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2016-08-02IB/hfi1: Make use of mm consistentIra Weiny8-31/+50
The hfi1 driver registers a mmu_notifier callback when /dev/hfi1_* is opened, and unregisters it when the device is closed. The driver incorrectly assumes that the close will always happen from the same context as the open. In particular, closes due to SIGKILL or OOM killer activity may happen from a different context. In these cases, the wrong mm is passed to mmu_notifier_unregister(), which causes improper reference counting for the victim mm, and eventual memory corruption. Preserve the mm for all open file descriptors and use this mm rather than current->mm for memory operations for the lifetime of that fd. Note: this patch leaves 1 use of current->mm in place. This use is removed in a follow on patch because other functional changes were required prior to that use being removed. If registration fails, there is no reason to keep the handler object around. Free the handler object rather than add it to the list to prevent any mmu_notifier operations, including unregister, when registration fails. Suggested-by: Jim Foraker <[email protected]> Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix user SDMA racy user request claimDean Luick2-13/+20
The user SDMA in-use claim bit is in the structure that gets zeroed out once the claim is made. Move the request in-use flag into its own bit array and use that for atomic claims. This cleans up the claim code and removes any race possibility. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix error condition that needs to clean upDean Luick1-1/+2
If input validation fails, properly free the request before returning. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Release node on insert failureDean Luick1-0/+1
If unable to insert node into the RB tree cache, node will be freed before returning from the function. Null out iovec's pointer to node so iovec does not try to free it later. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Validate SDMA user iovector countDean Luick1-2/+22
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Validate SDMA user request indexDean Luick1-0/+8
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Use the same capability state for all shared contextsDean Luick4-21/+12
Save the current capability state at user context creation time. Report this saved value for all shared contexts. Also get rid of unnecessary hfi1_get_base_kinfo function. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Prevent null pointer dereferenceIra Weiny1-1/+1
If a context has not been assigned or assignment failed, pq may be NULL. Move the unregister within the protection of the null check. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Rename TID mmu_rb_* functionsDean Luick1-12/+12
Clarify the names of the TID mmu functions. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unneeded empty check in hfi1_mmu_rb_unregister()Dean Luick1-9/+6
Checking if the rb tree is empty is redundant with the while loop which is emptying the rb tree. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Restructure hfi1_file_openIra Weiny1-4/+10
Rearrange the file open call in prep for new changes. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Make iovec loop index easy to understandDean Luick1-3/+3
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Use "false" not 0Ira Weiny1-1/+1
For bool parameters "false" should be used Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unused sub-context parameterIra Weiny1-5/+4
subctxt is not used, just remove it. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Consolidate __mmu_rb_remove and hfi1_mmu_rb_removeIra Weiny1-17/+9
__mmu_rb_remove was called in only 1 place which was a very simple call site. Combine this function into its caller. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Always expect ops functionsDean Luick1-14/+6
Remove, insert, and invalidate are always provided. No need to test. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Add parameter names to callback declarationsIra Weiny1-5/+6
This makes it more clear what these functions are operating on. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Add parameter names to function declarationsIra Weiny1-3/+5
Parameter names to function declarations make it more clear what those parameters do. Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unused function hfi1_mmu_rb_searchDean Luick2-19/+0
Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Remove unused uctxt->subpid and uctxt->pidDean Luick2-7/+0
These are no longer needed. Reviewed-by: Ira Weiny <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Fix minor format errorIra Weiny1-1/+2
Brackets should be on the next line of a function Reviewed-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Expand reported serial numberIra Weiny1-1/+7
Expand the serial number space by using more bits from the GUID. Reviewed-by: Jubin John <[email protected]> Signed-off-by: Dean Luick <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Allow for non-double word multiple message sizes for user SDMAIra Weiny1-9/+22
The driver pads non-double word multiple message sizes but it doesn't account for this padding when the packet length is calculated. Also, the data length is miscalculated for message sizes less than 4 bytes due to the bit representation in LRH. And there's a check for non-double word multiple message sizes that prevents these messages from being sent. This patch fixes length miscalculations and enables the functionality to send non-double word multiple message sizes. Reviewed-by: Harish Chegondi <[email protected]> Signed-off-by: Sebastian Sanchez <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/rdmavt: Eliminate redundant opcode test in mr ref clearIra Weiny1-2/+1
The use of the specific opcode test is redundant since all ack entry users correctly manipulate the mr pointer to selectively trigger the reference clearing. The overly specific test hinders the use of implementation specific operations. The change needs to get rid of the union to insure that an atomic value is not seen as an MR pointer. Reviewed-by: Ashutosh Dixit <[email protected]> Signed-off-by: Mike Marciniszyn <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02IB/hfi1: Handle kzalloc failure in init_pervl_scsIra Weiny1-3/+16
Checking the return value of the memory allocation call in init_pervl_scs() was missed. Recently the kmalloc() was changed to kzalloc() which identified the problem. While fixing this issue 2 other bugs were noticed. First, the array being allocated is accessed in the nomem path which can be reached before it is allocated. Second, kernel_send_context was not released on error. Fix both of these by creating a more common memory unwind label structure. Fixes: 35f6befc8441 ("staging/rdma/hfi1: Add qp to send context mapping for PIO") Reported-by: Leon Romanovsky <[email protected]> Reviewed-by: Mike Marciniszyn <[email protected]> Signed-off-by: Dennis Dalessandro <[email protected]> Signed-off-by: Ira Weiny <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2016-08-02Merge branch 'akpm' (patches from Andrew)Linus Torvalds38-469/+3166
Merge yet more updates from Andrew Morton: - the rest of ocfs2 - various hotfixes, mainly MM - quite a bit of misc stuff - drivers, fork, exec, signals, etc. - printk updates - firmware - checkpatch - nilfs2 - more kexec stuff than usual - rapidio updates - w1 things * emailed patches from Andrew Morton <[email protected]>: (111 commits) ipc: delete "nr_ipc_ns" kcov: allow more fine-grained coverage instrumentation init/Kconfig: add clarification for out-of-tree modules config: add android config fragments init/Kconfig: ban CONFIG_LOCALVERSION_AUTO with allmodconfig relay: add global mode support for buffer-only channels init: allow blacklisting of module_init functions w1:omap_hdq: fix regression w1: add helper macro module_w1_family w1: remove need for ida and use PLATFORM_DEVID_AUTO rapidio/switches: add driver for IDT gen3 switches powerpc/fsl_rio: apply changes for RIO spec rev 3 rapidio: modify for rev.3 specification changes rapidio: change inbound window size type to u64 rapidio/idt_gen2: fix locking warning rapidio: fix error handling in mbox request/release functions rapidio/tsi721_dma: advance queue processing from transfer submit call rapidio/tsi721: add messaging mbox selector parameter rapidio/tsi721: add PCIe MRRS override parameter rapidio/tsi721_dma: add channel mask and queue size parameters ...
2016-08-02Merge tag 'ceph-for-4.8-rc1' of git://github.com/ceph/ceph-clientLinus Torvalds1-7/+8
Pull Ceph updates from Ilya Dryomov: "The highlights are: - RADOS namespace support in libceph and CephFS (Zheng Yan and myself). The stopgaps added in 4.5 to deny access to inodes in namespaces are removed and CEPH_FEATURE_FS_FILE_LAYOUT_V2 feature bit is now fully supported - A large rework of the MDS cap flushing code (Zheng Yan) - Handle some of ->d_revalidate() in RCU mode (Jeff Layton). We were overly pessimistic before, bailing at the first sight of LOOKUP_RCU On top of that we've got a few CephFS bug fixes, a couple of cleanups and Arnd's workaround for a weird genksyms issue" * tag 'ceph-for-4.8-rc1' of git://github.com/ceph/ceph-client: (34 commits) ceph: fix symbol versioning for ceph_monc_do_statfs ceph: Correctly return NXIO errors from ceph_llseek ceph: Mark the file cache as unreclaimable ceph: optimize cap flush waiting ceph: cleanup ceph_flush_snaps() ceph: kick cap flushes before sending other cap message ceph: introduce an inode flag to indicates if snapflush is needed ceph: avoid sending duplicated cap flush message ceph: unify cap flush and snapcap flush ceph: use list instead of rbtree to track cap flushes ceph: update types of some local varibles ceph: include 'follows' of pending snapflush in cap reconnect message ceph: update cap reconnect message to version 3 ceph: mount non-default filesystem by name libceph: fsmap.user subscription support ceph: handle LOOKUP_RCU in ceph_d_revalidate ceph: allow dentry_lease_is_valid to work under RCU walk ceph: clear d_fsinfo pointer under d_lock ceph: remove ceph_mdsc_lease_release ceph: don't use ->d_time ...
2016-08-02w1:omap_hdq: fix regressionH. Nikolaus Schaller1-2/+0
Commit e93762bbf681 ("w1: masters: omap_hdq: add support for 1-wire mode") added a statement to clear the hdq_irqstatus flags in hdq_read_byte(). If the hdq reading process is scheduled slowly or interrupts are disabled for a while the hardware read activity might already be finished on entry of hdq_read_byte(). And hdq_isr() already has set the hdq_irqstatus to 0x6 (can be seen in debug mode) denoting that both, the TXCOMPLETE and RXCOMPLETE interrupts occurred in parallel. This means there is no need to wait and the hdq_read_byte() can just read the byte from the hdq controller. By resetting hdq_irqstatus to 0 the read process is forced to be always waiting again (because the if statement always succeeds) but the hardware will not issue another RXCOMPLETE interrupt. This results in a false timeout. After such a situation the hdq bus hangs. Link: http://lkml.kernel.org/r/b724765f87ad276a69625bc19806c8c8844c4590.1469513669.git.hns@goldelico.com Signed-off-by: H. Nikolaus Schaller <[email protected]> Cc: Evgeniy Polyakov <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02w1: add helper macro module_w1_familyAndrew F. Davis11-131/+22
The helper macro module_w1_family can be used in module drivers that only register a w1 driver in their module init functions. Add this macro and use it in all applicable drivers. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andrew F. Davis <[email protected]> Acked-by: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02w1: remove need for ida and use PLATFORM_DEVID_AUTOAndrew F. Davis3-66/+13
PLATFORM_DEVID_AUTO can be used to have the platform core assign a unique ID instead of manually creating one with IDA. Do this in all applicable drivers. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Andrew F. Davis <[email protected]> Acked-by: Evgeniy Polyakov <[email protected]> Cc: Greg KH <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio/switches: add driver for IDT gen3 switchesAlexandre Bounine3-0/+389
Add RapidIO switch driver for IDT Gen3 switch devices: RXS1632 and RXS2448. [[email protected]: fixup for original driver patch] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Tested-by: Barry Wood <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio: modify for rev.3 specification changesAlexandre Bounine6-149/+113
Implement changes made in RapidIO specification rev.3 to LP-Serial Physical Layer register definitions: - use per-port register offset calculations based on LP-Serial Extended Features Block (EFB) Register Map type (I or II) with different per-port offset step (0x20 vs 0x40 respectfully). - remove deprecated Parallel Physical layer definitions and related code. [[email protected]: fix DocBook warning for gen3 update] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Tested-by: Barry Wood <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio: change inbound window size type to u64Alexandre Bounine1-5/+9
Current definition of map_inb() mport operations callback uses u32 type to specify required inbound window (IBW) size. This is limiting factor because existing hardware - tsi721 and fsl_rio, both support IBW size up to 16GB. Changing type of size parameter to u64 to allow IBW size configurations larger than 4GB. [[email protected]: remove compiler warning about size of constant] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio/idt_gen2: fix locking warningAlexandre Bounine1-4/+3
Fix lockdep warning during device probing: move sysfs initialization out of code protected by a spin lock. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio: fix error handling in mbox request/release functionsAlexandre Bounine1-12/+42
Add checking for error code returned by HW-specific mbox open routines. Ensure that resources are properly release if failed. This patch is applicable to kernel versions starting from v2.6.15. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio/tsi721_dma: advance queue processing from transfer submit callAlexandre Bounine1-0/+1
Add advancing transfer queue immediately from transfer submit call. DMA performance improvement: This will start transfer without waiting for 'issue_pending' command if there is no DMA transfer in progress. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio/tsi721: add messaging mbox selector parameterAlexandre Bounine1-0/+15
Add module parameter to allow load time configuration of available RapidIO messaging mailboxes (MBOX1 - MBOX4). Having a messaging MBOX selector mask allows to define which MBOXes are controlled by the mport device driver and reserve some of them for direct use by other drivers. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Tested-by: Barry Wood <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio/tsi721: add PCIe MRRS override parameterAlexandre Bounine1-1/+15
Add PCIe Maximum Read Request Size (MRRS) adjustment parameter to allow users to override configuration register value set during PCIe bus initialization. Performance of Tsi721 device as PCIe bus master can be improved if MRRS is set to its maximum value (4096 bytes). Some platforms have limitations for supported MRRS and therefore the default value should be preserved, unless it is known that given platform supports full set of MRRS values defined by PCI Express specification. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio/tsi721_dma: add channel mask and queue size parametersAlexandre Bounine2-10/+18
Add module parameters to allow load time configuration of DMA channels. Depending on application, performance of DMA data transfers can benefit from adjusted sizes of buffer descriptor ring and/or transaction requests queue. Having HW DMA channel selector mask allows to define which channels (from seven available) are controlled by the mport device driver and reserve some of them for direct use by other drivers. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Tested-by: Barry Wood <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio: fix return value description for dma_prep functionsAlexandre Bounine1-2/+6
Update return value description for rio_dma_prep_... functions to include error-valued pointer that can be returned by HW mport device drivers. Return values from these functions must be checked using IS_ERR_OR_NULL macro. This patch is applicable to kernel versions starting from v4.6-rc1. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio: remove unnecessary 0x prefixes before %pa extension usesJoe Perches2-6/+6
Patch series "RapidIO subsystem updates". This set of patches contains RapidIO subsystem fixes and updates that have been made since kernel v4.6. The most significant update brings changes related to the latest revision of RapidIO specification (rev.3.x) and introduction of next generation of RapidIO switches by IDT (RXS1632 and RXS2448). This patch (of 13): This is RapidIO part of the original patch submitted by Joe Perches. (see: https://lkml.org/lkml/2016/3/5/19) Since commit 3cab1e711297 ("lib/vsprintf: refactor duplicate code to special_hex_number()") %pa uses have been output with a 0x prefix. These 0x prefixes in the formats are unnecessary. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Joe Perches <[email protected]> Signed-off-by: Alexandre Bounine <[email protected]> Cc: Matt Porter <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02rapidio: add RapidIO channelized messaging driverAlexandre Bounine3-0/+2376
Add channelized messaging driver to support native RapidIO messaging exchange between multiple senders/recipients on devices that use kernel RapidIO subsystem services. This device driver is the result of collaboration within the RapidIO.org Software Task Group (STG) between Texas Instruments, Prodrive Technologies, Nokia Networks, BAE and IDT. Additional input was received from other members of RapidIO.org. The objective was to create a character mode driver interface which exposes messaging capabilities of RapidIO endpoint devices (mports) directly to applications, in a manner that allows the numerous and varied RapidIO implementations to interoperate. This char mode device driver allows user-space applications to setup messaging communication channels using single shared RapidIO messaging mailbox. By default this driver uses RapidIO MBOX_1 (MBOX_0 is reserved for use by RIONET Ethernet emulation driver). [[email protected]: rapidio/rio_cm: fix return value check in riocm_init()] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Alexandre Bounine <[email protected]> Tested-by: Barry Wood <[email protected]> Cc: Matt Porter <[email protected]> Cc: Aurelien Jacquiot <[email protected]> Cc: Andre van Herk <[email protected]> Cc: Barry Wood <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02firmware: support loading into a pre-allocated bufferStephen Boyd1-26/+99
Some systems are memory constrained but they need to load very large firmwares. The firmware subsystem allows drivers to request this firmware be loaded from the filesystem, but this requires that the entire firmware be loaded into kernel memory first before it's provided to the driver. This can lead to a situation where we map the firmware twice, once to load the firmware into kernel memory and once to copy the firmware into the final resting place. This creates needless memory pressure and delays loading because we have to copy from kernel memory to somewhere else. Let's add a request_firmware_into_buf() API that allows drivers to request firmware be loaded directly into a pre-allocated buffer. This skips the intermediate step of allocating a buffer in kernel memory to hold the firmware image while it's read from the filesystem. It also requires that drivers know how much memory they'll require before requesting the firmware and negates any benefits of firmware caching because the firmware layer doesn't manage the buffer lifetime. For a 16MB buffer, about half the time is spent performing a memcpy from the buffer to the final resting place. I see loading times go from 0.081171 seconds to 0.047696 seconds after applying this patch. Plus the vmalloc pressure is reduced. This is based on a patch from Vikram Mulukutla on codeaurora.org: https://www.codeaurora.org/cgit/quic/la/kernel/msm-3.18/commit/drivers/base/firmware_class.c?h=rel/msm-3.18&id=0a328c5f6cd999f5c591f172216835636f39bcb5 Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Stephen Boyd <[email protected]> Cc: Mimi Zohar <[email protected]> Cc: Vikram Mulukutla <[email protected]> Cc: Mark Brown <[email protected]> Cc: Ming Lei <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02firmware: provide infrastructure to make fw caching optionalVikram Mulukutla1-2/+5
Some low memory systems with complex peripherals cannot afford to have the relatively large firmware images taking up valuable memory during suspend and resume. Change the internal implementation of firmware_class to disallow caching based on a configurable option. In the near future, variants of request_firmware will take advantage of this feature. Link: http://lkml.kernel.org/r/[email protected] [[email protected]: Drop firmware_desc design and use flags] Signed-off-by: Vikram Mulukutla <[email protected]> Signed-off-by: Stephen Boyd <[email protected]> Cc: Mimi Zohar <[email protected]> Cc: Mark Brown <[email protected]> Cc: Ming Lei <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02firmware: consolidate kmap/read/write logicStephen Boyd1-31/+26
Some systems are memory constrained but they need to load very large firmwares. The firmware subsystem allows drivers to request this firmware be loaded from the filesystem, but this requires that the entire firmware be loaded into kernel memory first before it's provided to the driver. This can lead to a situation where we map the firmware twice, once to load the firmware into kernel memory and once to copy the firmware into the final resting place. This design creates needless memory pressure and delays loading because we have to copy from kernel memory to somewhere else. This patch sets adds support to the request firmware API to load the firmware directly into a pre-allocated buffer, skipping the intermediate copying step and alleviating memory pressure during firmware loading. The drawback is that we can't use the firmware caching feature because the memory for the firmware cache is not managed by the firmware layer. This patch (of 3): We use similar structured code to read and write the kmapped firmware pages. The only difference is read copies from the kmap region and write copies to it. Consolidate this into one function to reduce duplication. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Stephen Boyd <[email protected]> Cc: Vikram Mulukutla <[email protected]> Cc: Mimi Zohar <[email protected]> Cc: Mark Brown <[email protected]> Cc: Ming Lei <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02fbdev/bfin_adv7393fb: move DRIVER_NAME before its first useBorislav Petkov2-2/+2
Move the DRIVER_NAME macro definition before the first usage site and fix build error. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Borislav Petkov <[email protected]> Reported-by: kbuild test robot <[email protected]> Cc: Jean-Christophe Plagniol-Villard <[email protected]> Cc: Tomi Valkeinen <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-02dynamic_debug: only add header when usedLuis de Bethencourt2-1/+1
kernel.h header doesn't directly use dynamic debug, instead we can include it in module.c (which used it via kernel.h). printk.h only uses it if CONFIG_DYNAMIC_DEBUG is on, changing the inclusion to only happen in that case. Link: http://lkml.kernel.org/r/[email protected] [[email protected]: include dynamic_debug.h in drb_int.h] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Luis de Bethencourt <[email protected]> Cc: Rusty Russell <[email protected]> Cc: Hidehiro Kawai <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Michal Nazarewicz <[email protected]> Cc: Rasmus Villemoes <[email protected]> Cc: Joe Perches <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-03cpufreq: Do not default-yes CPU_FREQ_STATBorislav Petkov1-1/+0
CPU frequency transition statistics are not absolutely required for proper cpufreq operation on the system AFAICT so remove the default-yes setting in Kconfig. Signed-off-by: Borislav Petkov <[email protected]> Acked-by: Viresh Kumar <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2016-08-02Merge tag 'drm-psr-fixes-for-v4.8' of ↵Linus Torvalds4-4/+55
git://people.freedesktop.org/~airlied/linux Pull i915 drm fixes from Dave Airlie: "These are the two fixes from Ville for the bug you are seeing on your HSW laptop. They pretty much disable PSR in some cases where the panel reports a setup time that would cause issues, like you seem to have" * tag 'drm-psr-fixes-for-v4.8' of git://people.freedesktop.org/~airlied/linux: drm/i915: Check PSR setup time vs. vblank length drm/dp: Add drm_dp_psr_setup_time()
2016-08-03ACPI / button: remove pointer to old lid_sysfs on unbindBenjamin Tissoires1-0/+4
When we removed the procfs dir on error or if the driver is unbound, the two variables acpi_lid_dir and acpi_button_dir were not reset. On the next rebind, those static variables were not null and we couldn't re-register the device again. Signed-off-by: Benjamin Tissoires <[email protected]> Acked-by: Lv Zheng <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
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