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This patch fixes the Kdump failure reported by Redhat wich was caused by
be2iscsi resetting the Chip when be2iscsi detects it is in crashdump mode. If
be2net was loaded before be2iscsi then this leaves be2net driver hanging on to
resources that the chip stopped recognising after the reset.
This patch replaces chip reset with Function reset so that only the
particular function and not the whole chip is affected
Signed-off-by: Jayamohan Kallickal <[email protected]>
Signed-off-by: Mike Christie <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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qlogicpti times out for some tape library operations (like mtx
inventory). It seems SCSI command timeout is hardcoded into the driver.
Fix it by propagating the timeout from scsi request to the controller as
suggested by James Bottomley.
Tested on Sun Ultra 1 with Sun StorEdge L8 Autoloader.
Signed-off-by: Meelis Roos <[email protected]>
Acked-by: David S. Miller <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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This patch adds one more check-condition for scsi_dh_alua handler. Without
this, the handler attach fails sometimes during the discovery. I have noticed
this with NetApp E-Series storage with alua mode. Also removed some
unnecessary brackets {} for consistency.
Signed-off-by: Babu Moger <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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The write buffer command is used to download and burn new IOA FW images.
The same interface can now be used to flash FPGA and flash back DRAM images.
To download and flash the new images takes more than 15 minutes, so increase
the write buffer command timeout to 30 minutes.
The FPGA and flash back DRAM images don't have the same card_type as the IOA FW
image. So, remove the sanity checking from the driver. The adapter has sanity
checking and will only accept a valid image.
Signed-off-by: Wayne Boyer <[email protected]>
Acked-by: Brian King <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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port->dev_list maintains a list of devices attached to a given sas root port.
It needs to be mutated under a lock as contexts outside of the
single-threaded-libsas-workqueue access the list via sas_find_dev_by_rphy().
Fixup locations where the list was being mutated without a lock.
This is a follow-up to commit 5911e963 "[SCSI] libsas: remove expander
from dev list on error", where Luben noted [1]:
> 2/ We have unlocked list manipulations in sas_ex_discover_end_dev(),
> sas_unregister_common_dev(), and sas_ex_discover_end_dev()
Yes, I can see that and that is very unfortunate.
[1]: http://marc.info/?l=linux-scsi&m=131480962006471&w=2
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Signed-off-by: Bhanu Prakash Gollapudi <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Add support for get_lesb so that the valid statistics are returned by the
remote peer when RLS command is issued.
Signed-off-by: Bhanu Prakash Gollapudi <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Except for obtaining the netdev from lport, fcoe_get_lesb is the common code
for the LLDs.
Signed-off-by: Bhanu Prakash Gollapudi <[email protected]>
Acked-by: Yi Zou <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Link may not be up when the driver receives ulp_start event, and hence
fcoe_ctlr_link_up is not called. Call fcoe_ctlr_link_up during
indicate_netevent only when the interface is enabled. (It has to be called when
enabled because that is an indication that the vlan discovery is completed).
Signed-off-by: Bhanu Prakash Gollapudi <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Signed-off-by: Paul Bolle <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>
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Conflicts:
net/batman-adv/soft-interface.c
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When a wide port is being utilized to a target, if one disables only one
of the
phys, we get an OS crash:
BUG: unable to handle kernel NULL pointer dereference at
0000000000000238
IP: [<ffffffff814ca9b1>] mutex_lock+0x21/0x50
PGD 4103f5067 PUD 41dba9067 PMD 0
Oops: 0002 [#1] SMP
last sysfs file: /sys/bus/pci/slots/5/address
CPU 0
Modules linked in: pm8001(U) ses enclosure fuse nfsd exportfs autofs4
ipmi_devintf ipmi_si ipmi_msghandler nfs lockd fscache nfs_acl
auth_rpcgss 8021q fcoe libfcoe garp libfc scsi_transport_fc stp scsi_tgt
llc sunrpc cpufreq_ondemand acpi_cpufreq freq_table ipv6 sr_mod cdrom
dm_mirror dm_region_hash dm_log uinput sg i2c_i801 i2c_core iTCO_wdt
iTCO_vendor_support e1000e mlx4_ib ib_mad ib_core mlx4_en mlx4_core ext3
jbd mbcache sd_mod crc_t10dif usb_storage ata_generic pata_acpi ata_piix
libsas(U) scsi_transport_sas dm_mod [last unloaded: pm8001]
Modules linked in: pm8001(U) ses enclosure fuse nfsd exportfs autofs4
ipmi_devintf ipmi_si ipmi_msghandler nfs lockd fscache nfs_acl
auth_rpcgss 8021q fcoe libfcoe garp libfc scsi_transport_fc stp scsi_tgt
llc sunrpc cpufreq_ondemand acpi_cpufreq freq_table ipv6 sr_mod cdrom
dm_mirror dm_region_hash dm_log uinput sg i2c_i801 i2c_core iTCO_wdt
iTCO_vendor_support e1000e mlx4_ib ib_mad ib_core mlx4_en mlx4_core ext3
jbd mbcache sd_mod crc_t10dif usb_storage ata_generic pata_acpi ata_piix
libsas(U) scsi_transport_sas dm_mod [last unloaded: pm8001]
Pid: 5146, comm: scsi_wq_5 Not tainted
2.6.32-71.29.1.el6.lustre.7.x86_64 #1 Storage Server
RIP: 0010:[<ffffffff814ca9b1>] [<ffffffff814ca9b1>]
mutex_lock+0x21/0x50
RSP: 0018:ffff8803e4e33d30 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000238 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff8803e664c800 RDI: 0000000000000238
RBP: ffff8803e4e33d40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000238 R14: ffff88041acb7200 R15: ffff88041c51ada0
FS: 0000000000000000(0000) GS:ffff880028200000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000238 CR3: 0000000410143000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process scsi_wq_5 (pid: 5146, threadinfo ffff8803e4e32000, task
ffff8803e4e294a0)
Stack:
ffff8803e664c800 0000000000000000 ffff8803e4e33d70 ffffffffa001f06e
<0> ffff8803e4e33d60 ffff88041c51ada0 ffff88041acb7200 ffff88041bc0aa00
<0> ffff8803e4e33d90 ffffffffa0032b6c 0000000000000014 ffff88041acb7200
Call Trace:
[<ffffffffa001f06e>] sas_port_delete_phy+0x2e/0xa0 [scsi_transport_sas]
[<ffffffffa0032b6c>] sas_unregister_devs_sas_addr+0xac/0xe0 [libsas]
[<ffffffffa0034914>] sas_ex_revalidate_domain+0x204/0x330 [libsas]
[<ffffffffa00307f0>] ? sas_revalidate_domain+0x0/0x90 [libsas]
[<ffffffffa0030855>] sas_revalidate_domain+0x65/0x90 [libsas]
[<ffffffff8108c7d0>] worker_thread+0x170/0x2a0
[<ffffffff81091ea0>] ? autoremove_wake_function+0x0/0x40
[<ffffffff8108c660>] ? worker_thread+0x0/0x2a0
[<ffffffff81091b36>] kthread+0x96/0xa0
[<ffffffff810141ca>] child_rip+0xa/0x20
[<ffffffff81091aa0>] ? kthread+0x0/0xa0
[<ffffffff810141c0>] ? child_rip+0x0/0x20
Code: ff ff 85 c0 75 ed eb d6 66 90 55 48 89 e5 48 83 ec 10 48 89 1c 24
4c 89 64 24 08 0f 1f 44 00 00 48 89 fb e8 92 f4 ff ff 48 89 df <f0> ff
0f 79 05 e8 25 00 00 00 65 48 8b 04 25 08 cc 00 00 48 2d
RIP [<ffffffff814ca9b1>] mutex_lock+0x21/0x50
RSP <ffff8803e4e33d30>
CR2: 0000000000000238
The following patch is admittedly a band-aid, and does not solve the
root cause, but it still is a good candidate for hardening as a pointer
check before reference.
Signed-off-by: Mark Salyzyn <[email protected]>
Tested-by: Jack Wang <[email protected]>
Cc: [email protected]
Signed-off-by: James Bottomley <[email protected]>
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Allow the sas-transport-class to update events for local phys via a new
PHY_FUNC_GET_EVENTS command to ->lldd_control_phy(). Fixup drivers that
are not prepared for new enum phy_func values, and unify
->lldd_control_phy() error codes.
These are the SAS defined phy events that are reported in a
smp-report-phy-error-log command:
* /sys/class/sas_phy/<phyX>/invalid_dword_count
* /sys/class/sas_phy/<phyX>/running_disparity_error_count
* /sys/class/sas_phy/<phyX>/loss_of_dword_sync_count
* /sys/class/sas_phy/<phyX>/phy_reset_problem_count
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Fixes a bug where any phy removed from the port set the port
state to "stopping" - do this only when the last phy removed
from the port.
Signed-off-by: Jeff Skirvin <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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DONE_CRC_ERR is not a RNC suspension condition, so do not change the
state to expect the incoming suspension notification.
Signed-off-by: Jeff Skirvin <[email protected]>
[djbw: dropped DONE_CMD_LL_R_ERR change]
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Since libsas has it's own means to escalate SATA/STP device error
handling depending on task status codes, return all SATA/STP I/O
on the normal path.
i.e. skip sas_task_abort() and let sas_ata_task_done() disposition the
qc. Longer term we want to audit non-essential calls to
sas_task_abort().
Signed-off-by: Jeff Skirvin <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Based on original implementation from Jiangbi Liu and Maciej Trela.
ATAPI transfers happen in two-to-three stages. The two stage atapi
commands are those that include a dma data transfer. The data transfer
portion of these operations is handled by the hardware packet-dma
acceleration. The three-stage commands do not have a data transfer and
are handled without hardware assistance in raw frame mode.
stage1: transmit host-to-device fis to notify the device of an incoming
atapi cdb. Upon reception of the pio-setup-fis repost the task_context
to perform the dma transfer of the cdb+data (go to stage3), or repost
the task_context to transmit the cdb as a raw frame (go to stage 2).
stage2: wait for hardware notification of the cdb transmission and then
go to stage 3.
stage3: wait for the arrival of the terminating device-to-host fis and
terminate the command.
To keep the implementation simple we only support ATAPI packet-dma
protocol (for commands with data) to avoid needing to handle the data
transfer manually (like we do for SATA-PIO). This may affect
compatibility for a small number of devices (see
ATA_HORKAGE_ATAPI_MOD16_DMA).
If the data-transfer underruns, or encounters an error the
device-to-host fis is expected to arrive in the unsolicited frame queue
to pass to libata for disposition. However, in the DONE_UNEXP_FIS (data
underrun) case it appears we need to craft a response. In the
DONE_REG_ERR case we do receive the UF and propagate it to libsas.
Signed-off-by: Maciej Trela <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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This will synchronize the version string with internal driver.
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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set SMP link timeout value to maximum.
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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with 1 expander, connect 8 HDD, the write performance will be
improved by 80%.
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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-- change connection behavior
-- set bit8 to 1 for performance tuning
-- set bit0 to 0 to enable retry for no_dest reject case.
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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disable non data frame retry
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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spin up issue: some direct attached SAS device can't spin up
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Add support for Marvell 88SE9480 SAS/SATA HBA
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Expanders fail to link when the phy rates are mismatched.
Signed-off-by: Xiangliang Yu <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Needed to jump to scic_lock unlock.
Also spotted by coccicheck.
Signed-off-by: Jeff Skirvin <[email protected]>
Cc: <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Kill the local smp response buffer.
Besides being unnecessary, it is too small (currently truncates
responses to 60 bytes). The mid-layer will have already allocated a
sufficiently sized buffer, just kmap and copy into it directly.
Cc: <[email protected]>
Reported-by: Derick Marks <[email protected]>
Tested-by: Derick Marks <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Code Inspection: found two missing break directives. First one will
result in not retrying an a task that report
IO_OPEN_CNX_ERROR_HW_RESOURCE_BUSY, the second will result in cosmetic
debug printk conflicting statement stutter. Because checkpatch.pl came
up with a warning regarding unnecessary space before a newline on one of
the fragments associated with the diff context, I took the liberty of
fixing all the cases of this issue in the pair of files touched by this
defect. These cosmetic changes hide the break changes :-(
To help focus, break changes are in pm8001_hwi.c fragment line 1649 for
the IO_OPEN_CNX_ERROR_HW_RESOURCE_BUSY case statement and pm8001_sas.c
line 1000 deals with the conflicting debug print stutter.
Signed-off-by: Mark Salyzyn <[email protected]>
Acked-by: Jack Wang <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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On the pm8001, when a device is in the process of going away (device
power off or hot plug), depending on the timing, the driver would return
SAS_PHY_DOWN as the return value to the queuecommand DEV_IS_GONE logic.
The net result is an near infinite retry (especially if SAS debugging is
enabled), the logs will fill with:
kernel: mpi_ssp_completion 2119:e21:SSP IO status 0x13 tag 0xcc1c0000
dlen=90 param=0xe
kernel: wwn=5000c50034069e86 cdb=12 00 00 00 5a 00 00 00 00 00 00 00 00
00 00 00
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
. . .
This patch changes to leverage the port_attached logic to complete the
command with a status of PHY_DOWN so that the disposition can be handled
immediately and correctly.
Signed-off-by: Mark Salyzyn <[email protected]>
Acked-by: Jack Wang <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Currently fcoe_ddp_min doesn't have default value
so by default not used, so setting up default value
as 4k as this works better by avoiding overhead
of programing DDP for small IOs.
Signed-off-by: Vasu Dev <[email protected]>
Tested-by: Ross Brattain <[email protected]>
Signed-off-by: Yi Zou <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Use real dev in case it has HW vlan acceleration
support since in this case the real dev would
do needed vlan processing, this way unnecessary
vlan layer processing avoided and it gives
slightly better IOPS with 512B size IOs.
Signed-off-by: Vasu Dev <[email protected]>
Tested-by: Ross Brattain <[email protected]>
Signed-off-by: Yi Zou <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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fix holes and better cache aligned fields.
Signed-off-by: Vasu Dev <[email protected]>
Tested-by: Ross Brattain <[email protected]>
Signed-off-by: Yi Zou <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Re-arrange its fields to avoid padding and have better
cacheline alignments.
Removed not used start_time, end_time and last_pkt_time
fields.
This all reduced this struct size to 448 from 480 and
that also reduced one cacheline on x86_64 beside
eliminating 8 pads. However kept logical fields together.
Signed-off-by: Vasu Dev <[email protected]>
Tested-by: Ross Brattain <[email protected]>
Signed-off-by: Yi Zou <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Since fcoe_percpu_thread_create() creates percpu kthread, it makes sense
to use kthread_create_on_node() to get proper NUMA affinity for kthread
stack.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: Yi Zou <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Libsas forget to set the sas_address and device type of rphy lead to file
under /sys/class/sas_x show wrong value, fix that.
Signed-off-by: Jack Wang <[email protected]>
Tested-by: Crystal Yu <[email protected]>
Cc: [email protected]
Signed-off-by: James Bottomley <[email protected]>
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libsas handles:
1/ limiting ata scanning to lun0
2/ changes to /sys/block/<sdX>/device/queue_depth for ata devices
libata handles turning off ncq globally via kernel command line
(libata.force=noncq) or sysfs (echo 1 >
/sys/block/<sdX>/device/queue_depth). A lldd specific compile option is
not necessary.
Cc: Jack Wang <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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libsas now handles:
1/ limiting ata scanning to lun0
2/ maximizing the queue_depth of sas devices (up to 256, mvsas only
supports 64)
3/ changes to /sys/block/<sdX>/device/queue_depth for ata devices
Acked-by: Xiangliang Yu <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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The queue-depth for libsas-attached devices initializes to 32 and can
only be increased manually via sysfs to a max of 64, while mpt2sas
attached devices initialize to 254 and dynamically float via the
midlayer ->change_queue_depth interface.
No performance regression was observed with this change on the isci
driver.
Tested-by: Dave Jiang <[email protected]>
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Pass queue_depth change requests to libata, and prevent queue_type
changes for ATA devices.
Otherwise:
1/ we do not honor the libata specific restrictions on the queue depth
2/ libsas drivers that do not set sdev->tagged_supported are unable to
change the queue_depth of ata devices via sysfs
Signed-off-by: Dan Williams <[email protected]>
Acked-by: Jeff Garzik <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Currently mvsas and pm8001 have custom ->slave_alloc implementations to
achieve this. Uplevel it for all libsas drivers as isci encounters problems
with atapi devices when scanning past lun0.
Just do what Darrick suggested [1], and limit the scan for ata devices.
[1] http://marc.info/?l=linux-scsi&m=116604101119861&w=2
Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Allow expander table-to-table attachments for
expanders that support it.
Signed-off-by: Luben Tuikov <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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I hit a crash in qla2x00_abort_all_cmds() if the qla2xxx module is
unloaded right after it is loaded. I debugged this down to the abort
handling improperly treating a command of type SRB_ADISC_CMD as if it
had a bsg_job to complete when that command actually uses the iocb_cmd
part of the union. (I guess to hit this one has to unload the module
while the async FC initialization is still in progress)
It seems we should only look for a bsg_job if type is SRB_ELS_CMD_RPT,
SRB_ELS_CMD_HST or SRB_CT_CMD, so switch the test to make that explicit.
Signed-off-by: Roland Dreier <[email protected]>
Acked-by: Chad Dupuis <[email protected]>
Cc: [email protected]
Signed-off-by: James Bottomley <[email protected]>
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* git://bedivere.hansenpartnership.com/git/scsi-rc-fixes-2.6:
[SCSI] 3w-9xxx: fix iommu_iova leak
[SCSI] cxgb3i: convert cdev->l2opt to use rcu to prevent NULL dereference
[SCSI] scsi: qla4xxx needs libiscsi.o
[SCSI] libsas: fix failure to revalidate domain for anything but the first expander child.
[SCSI] aacraid: reset should disable MSI interrupt
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There are numerous broken references to Documentation files (in other
Documentation files, in comments, etc.). These broken references are
caused by typo's in the references, and by renames or removals of the
Documentation files. Some broken references are simply odd.
Fix these broken references, sometimes by dropping the irrelevant text
they were part of.
Signed-off-by: Paul Bolle <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>
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Following reports on the list, it looks like the 3e-9xxx driver will leak dma
mappings every time we get a transient queueing error back from the card.
This is because it maps the sg list in the routine that sends the command, but
doesn't unmap again in the transient failure path (even though the command is
sent back to the block layer). Fix by unmapping before returning the status.
Reported-by: Chris Boot <[email protected]>
Tested-by: Chris Boot <[email protected]>
Acked-by: Adam Radford <[email protected]>
Cc: [email protected]
Signed-off-by: James Bottomley <[email protected]>
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This oops was reported recently:
d:mon> e
cpu 0xd: Vector: 300 (Data Access) at [c0000000fd4c7120]
pc: d00000000076f194: .t3_l2t_get+0x44/0x524 [cxgb3]
lr: d000000000b02108: .init_act_open+0x150/0x3d4 [cxgb3i]
sp: c0000000fd4c73a0
msr: 8000000000009032
dar: 0
dsisr: 40000000
current = 0xc0000000fd640d40
paca = 0xc00000000054ff80
pid = 5085, comm = iscsid
d:mon> t
[c0000000fd4c7450] d000000000b02108 .init_act_open+0x150/0x3d4 [cxgb3i]
[c0000000fd4c7500] d000000000e45378 .cxgbi_ep_connect+0x784/0x8e8 [libcxgbi]
[c0000000fd4c7650] d000000000db33f0 .iscsi_if_rx+0x71c/0xb18
[scsi_transport_iscsi2]
[c0000000fd4c7740] c000000000370c9c .netlink_data_ready+0x40/0xa4
[c0000000fd4c77c0] c00000000036f010 .netlink_sendskb+0x4c/0x9c
[c0000000fd4c7850] c000000000370c18 .netlink_sendmsg+0x358/0x39c
[c0000000fd4c7950] c00000000033be24 .sock_sendmsg+0x114/0x1b8
[c0000000fd4c7b50] c00000000033d208 .sys_sendmsg+0x218/0x2ac
[c0000000fd4c7d70] c00000000033f55c .sys_socketcall+0x228/0x27c
[c0000000fd4c7e30] c0000000000086a4 syscall_exit+0x0/0x40
--- Exception: c01 (System Call) at 00000080da560cfc
The root cause was an EEH error, which sent us down the offload_close path in
the cxgb3 driver, which in turn sets cdev->l2opt to NULL, without regard for
upper layer driver (like the cxgbi drivers) which might have execution contexts
in the middle of its use. The result is the oops above, when t3_l2t_get attempts
to dereference L2DATA(cdev)->nentries in arp_hash right after the EEH error handler sets it to NULL.
The fix is to prevent the setting of the NULL pointer until after there are no
further users of it. The t3cdev->l2opt pointer is now converted to be an rcu
pointer and the L2DATA macro is now called under the protection of the
rcu_read_lock(). When the EEH error path:
t3_adapter_error->offload_close->cxgb3_offload_deactivate
Is exectured, setting of that l2opt pointer to NULL, is now gated on an rcu
quiescence point, preventing, allowing L2DATA callers to safely check for a NULL
pointer without concern that the underlying data will be freeded before the
pointer is dereferenced.
This has been tested by the reporter and shown to fix the reproted oops
[nhorman: fix up unitinialised variable reported by Dan Carpenter]
Signed-off-by: Neil Horman <[email protected]>
Reviewed-by: Karen Xie <[email protected]>
Cc: [email protected]
Signed-off-by: James Bottomley <[email protected]>
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sector_t can be different types, so cast it to its largest possible
type.
drivers/scsi/qla2xxx/qla_isr.c:1509:5: warning: format '%lx' expects type 'long unsigned int', but argument 5 has type 'sector_t'
Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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SCSI_ISCI needs to select SCSI_SAS_HOST_SMP to ensure that all
needed symbols are available to it.
Fixes this build error:
ERROR: "try_test_sas_gpio_gp_bit" [drivers/scsi/isci/isci.ko] undefined!
Signed-off-by: Randy Dunlap <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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When the ipr driver decides to dump the adapter, it changes the
sdt_state to GET_DUMP, then prepares the adapter so that the dump
can be read. However, if the ipr worker thread wakes up for some
reason before the driver has put the adapter in a state where it
can succesfully dump the adapter, the driver will start dumping
the adapter too early, which can potentially trigger a BUG check
in the pci config blocking API. Fix this by adding a new
sdt_state to differentiate between the ipr driver wanting to dump
the adapter in the near future and wanting to dump the adapter now.
Signed-off-by: Brian King <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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Signed-off-by: Vijay Chauhan <[email protected]>
Reviewed-by: Bob Stankey <[email protected]>
Reviewed-by: Babu Moger <[email protected]>
Acked-by: Chandra Seetharaman <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
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