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2013-08-30net: at91_ether: use dev_get_platdata()Jingoo Han1-1/+1
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. This is a cosmetic change to make the code simpler and enhance the readability. Signed-off-by: Jingoo Han <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-08-29net/cadence/macb: fix invalid 0 return if no phy is discovered on mii initBoris BREZILLON1-3/+3
Replace misleading -1 (-EPERM) by a more appropriate return code (-ENXIO) in macb_mii_probe function. Save macb_mii_probe return before branching to err_out_unregister to avoid erronous 0 return. Signed-off-by: Boris BREZILLON <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-08-26net/cadence/macb: add support for dt phy definitionBoris BREZILLON1-7/+34
The macb driver only handle PHY description through platform_data (macb_platform_data). Thus, when using dt you cannot define phy properties like phy address or phy irq pin. This patch makes use of the of_mdiobus_register to add support for phy device definition using dt. A fallback to the autoscan procedure is added in case there is no phy devices defined in dt. Signed-off-by: Boris BREZILLON <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-07-11drivers/net/ethernet/cadence: don't use devm_pinctrl_get_select_default() in ↵Wolfram Sang1-11/+0
probe Since commit ab78029 (drivers/pinctrl: grab default handles from device core), we can rely on device core for setting the default pins. Compile tested only. Acked-by: Linus Walleij <[email protected]> (personally at LCE13) Signed-off-by: Wolfram Sang <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-07-09net/cadence/macb: fix bug/typo in extracting gem_irq_read_clear bitJongsung Kim1-1/+1
Signed-off-by: Jongsung Kim <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-06-19at91_ether: Do not select NET_COREBen Hutchings1-1/+0
This has no dependency on any of the drivers under NET_CORE. Signed-off-by: Ben Hutchings <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-06-06net/macb: change RX path for GEMNicolas Ferre2-49/+272
GEM is able to adapt its DMA buffer size, so change the RX path to take advantage of this possibility and remove all kind of memcpy in this path. This modification introduces function pointers for managing differences between MACB and GEM adapter type. Signed-off-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-06-06net/macb: increase RX buffer size for GEMNicolas Ferre2-8/+38
Macb Ethernet controller requires a RX buffer of 128 bytes. It is highly sub-optimal for Gigabit-capable GEM that is able to use a bigger DMA buffer. Change this constant and associated macros with data stored in the private structure. RX DMA buffer size has to be multiple of 64 bytes as indicated in DMA Configuration Register specification. Signed-off-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-05-27net: ethernet: remove unnecessary platform_set_drvdata()Jingoo Han2-3/+0
The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <[email protected]> Acked-by: Nicolas Ferre <[email protected]> Acked-by: Rob Herring <[email protected]> Acked-by: Roland Stigge <[email protected]> Acked-by: Mugunthan V N <[email protected]> Reviewed-by: H Hartley Sweeten <[email protected]> Tested-by: Roland Stigge <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-05-14net/macb: fix ISR clear-on-write behavior only for some SoCNicolas Ferre2-2/+23
Commit 749a2b6 (net/macb: clear tx/rx completion flags in ISR) introduces clear-on-write on ISR register. This behavior is not always implemented when using Cadence MACB/GEM and is breaking other platforms. We are using the Design Configuration Register 1 information and a capability property to actually activate this clear-on-write behavior on ISR. Reported-by: Hein Tibosch <[email protected]> Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Hein Tibosch <[email protected]> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-05-11net/ethernet: MACB should depend on HAS_DMAGeert Uytterhoeven1-0/+1
If NO_DMA=y: drivers/built-in.o: In function `macb_free_consistent': drivers/net/ethernet/cadence/macb.c:878: undefined reference to `dma_free_coherent' drivers/net/ethernet/cadence/macb.c:883: undefined reference to `dma_free_coherent' drivers/net/ethernet/cadence/macb.c:888: undefined reference to `dma_free_coherent' drivers/built-in.o: In function `macb_alloc_consistent': drivers/net/ethernet/cadence/macb.c:905: undefined reference to `dma_alloc_coherent' drivers/built-in.o: In function `macb_tx_interrupt': drivers/net/ethernet/cadence/macb.c:515: undefined reference to `dma_unmap_single' drivers/built-in.o: In function `macb_tx_error_task': drivers/net/ethernet/cadence/macb.c:457: undefined reference to `dma_unmap_single' drivers/built-in.o: In function `macb_start_xmit': drivers/net/ethernet/cadence/macb.c:838: undefined reference to `dma_map_single' Signed-off-by: Geert Uytterhoeven <[email protected]> Cc: Nicolas Ferre <[email protected]> Cc: David S. Miller <[email protected]> Cc: [email protected] Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-05-11net/ethernet: ARM_AT91_ETHER should depend on HAS_DMAGeert Uytterhoeven1-1/+1
If NO_DMA=y: drivers/built-in.o: In function `at91ether_start': drivers/net/ethernet/cadence/at91_ether.c:49: undefined reference to `dma_alloc_coherent' drivers/net/ethernet/cadence/at91_ether.c:60: undefined reference to `dma_free_coherent' drivers/built-in.o: In function `at91ether_interrupt': drivers/net/ethernet/cadence/at91_ether.c:250: undefined reference to `dma_unmap_single' drivers/built-in.o: In function `at91ether_start_xmit': drivers/net/ethernet/cadence/at91_ether.c:169: undefined reference to `dma_map_single' drivers/built-in.o: In function `at91ether_close': drivers/net/ethernet/cadence/at91_ether.c:145: undefined reference to `dma_free_coherent' Signed-off-by: Geert Uytterhoeven <[email protected]> Cc: Nicolas Ferre <[email protected]> Cc: David S. Miller <[email protected]> Cc: [email protected] Acked-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-04-15net/macb: fix error return code in macb_probe()Nicolas Ferre1-2/+2
Fix to return a negative error code from the error handling case instead of 0, as returned elsewhere in this function. Original-idea-by: <[email protected]> Signed-off-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-04-12net/at91_ether: fix error return code in at91ether_probe()Wei Yongjun1-1/+2
Fix to return a negative error code from the error handling case instead of 0, as returned elsewhere in this function. Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-04-02net/cadence/macb: Simplify OF dependenciesGuenter Roeck1-37/+6
With of_get_mac_address() and of_get_phy_mode() now defined as dummy functions if OF_NET is not configured, it is no longer necessary to provide OF dependent functions as front-end. Also, the two functions depend on OF_NET, not on OF, so the conditional code was not correct anyway. Drop the front-end functions and call of_get_mac_address() and of_get_phy_mode() directly instead. Signed-off-by: Guenter Roeck <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-04-02net/cadence/at91_ether: Simplify OF dependenciesGuenter Roeck1-38/+6
With of_get_mac_address() and of_get_phy_mode() now defined as dummy functions if OF_NET is not configured, it is no longer necessary to provide OF dependent functions as front-end. Also, the two functions depend on OF_NET, not on OF, so the conditional code was not correct anyway. Drop the front-end functions and call of_get_mac_address() and of_get_phy_mode() directly instead. Signed-off-by: Guenter Roeck <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-28net/macb: make clk_enable atomicSteffen Trumtrar1-10/+10
Use clk_prepare_enable/clk_disable_unprepare to be safe on SMP systems. Signed-off-by: Steffen Trumtrar <[email protected]> Cc: Nicolas Ferre <[email protected]> Cc: Fabio Estevam <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-28net/macb: force endian_swp_pkt_en to offSteffen Trumtrar2-0/+3
The core has a bit for swapping packet data endianism. Reset default from Cadence is off. Xilinx however, who uses this core on the Zynq SoCs, opted for on. Force it to off. This shouldn't change the behaviour for current users of the macb, but enables usage on Zynq devices. Signed-off-by: Steffen Trumtrar <[email protected]> Cc: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-28net/macb: clear tx/rx completion flags in ISRSteffen Trumtrar1-0/+3
At least in the cadence IP core on the Xilinx Zynq SoC the TCOMP/RCOMP flags are not auto-cleaned. As these flags are evaluated, they need to be cleaned. Signed-off-by: Steffen Trumtrar <[email protected]> Cc: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-15drivers:net: Remove dma_alloc_coherent OOM messagesJoe Perches1-11/+8
I believe these error messages are already logged on allocation failure by warn_alloc_failed and so get a dump_stack on OOM. Remove the unnecessary additional error logging. Around these deletions: o Alignment neatening. o Remove unnecessary casts of dma_alloc_coherent. o Hoist assigns from ifs. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-09drivers:net: Remove unnecessary OOM messages after netdev_alloc_skbJoe Perches1-1/+0
Emitting netdev_alloc_skb and netdev_alloc_skb_ip_align OOM messages is unnecessary as there is already a dump_stack after allocation failures. Other trivial changes around these removals: Convert a few comparisons of pointer to 0 to !pointer. Change flow to remove unnecessary label. Remove now unused variable. Hoist assignment from if. Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-05net: macb: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-03-05net: at91_ether: use module_platform_driver_probe()Jingoo Han1-12/+1
This patch uses module_platform_driver_probe() macro which makes the code smaller and simpler. Signed-off-by: Jingoo Han <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-02-21Merge branch 'for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 update from Martin Schwidefsky: "The most prominent change in this patch set is the software dirty bit patch for s390. It removes __HAVE_ARCH_PAGE_TEST_AND_CLEAR_DIRTY and the page_test_and_clear_dirty primitive which makes the common memory management code a bit less obscure. Heiko fixed most of the PCI related fallout, more often than not missing GENERIC_HARDIRQS dependencies. Notable is one of the 3270 patches which adds an export to tty_io to be able to resize a tty. The rest is the usual bunch of cleanups and bug fixes." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (42 commits) s390/module: Add missing R_390_NONE relocation type drivers/gpio: add missing GENERIC_HARDIRQ dependency drivers/input: add couple of missing GENERIC_HARDIRQS dependencies s390/cleanup: rename SPP to LPP s390/mm: implement software dirty bits s390/mm: Fix crst upgrade of mmap with MAP_FIXED s390/linker skript: discard exit.data at runtime drivers/media: add missing GENERIC_HARDIRQS dependency s390/bpf,jit: add vlan tag support drivers/net,AT91RM9200: add missing GENERIC_HARDIRQS dependency iucv: fix kernel panic at reboot s390/Kconfig: sort list of arch selected config options phylib: remove !S390 dependeny from Kconfig uio: remove !S390 dependency from Kconfig dasd: fix sysfs cleanup in dasd_generic_remove s390/pci: fix hotplug module init s390/pci: cleanup clp page allocation s390/pci: cleanup clp inline assembly s390/perf: cpum_cf: fallback to software sampling events s390/mm: provide PAGE_SHARED define ...
2013-02-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net into netDavid S. Miller1-0/+5
Pull in 'net' to take in the bug fixes that didn't make it into 3.8-final. Also, deal with the semantic conflict of the change made to net/ipv6/xfrm6_policy.c A missing rt6->n neighbour release was added to 'net', but in 'net-next' we no longer cache the neighbour entries in the ipv6 routes so that change is not appropriate there. Signed-off-by: David S. Miller <[email protected]>
2013-02-14drivers/net,AT91RM9200: add missing GENERIC_HARDIRQS dependencyHeiko Carstens1-0/+1
The AT91RM9200 driver call devm_request_irq() and therefore should depend on GENERIC_HARDIRQS to prevent link/compile errors on plaforms without GENERIC_HARDIRQS. Signed-off-by: Heiko Carstens <[email protected]> Acked-by: David S. Miller <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2013-02-13net/macb: fix race with RX interrupt while doing NAPINicolas Ferre1-0/+5
When interrupts are disabled, an RX condition can occur but it is not reported when enabling interrupts again. We need to check RSR and use napi_reschedule() if condition is met. Signed-off-by: Nicolas Ferre <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-01-14net: phy: remove flags argument from phy_{attach, connect, connect_direct}Florian Fainelli1-1/+1
The flags argument of the phy_{attach,connect,connect_direct} functions is then used to assign a struct phy_device dev_flags with its value. All callers but the tg3 driver pass the flag 0, which results in the underlying PHY drivers in drivers/net/phy/ not being able to actually use any of the flags they would set in dev_flags. This patch gets rid of the flags argument, and passes phydev->dev_flags to the internal PHY library call phy_attach_direct() such that drivers which actually modify a phy device dev_flags get the value preserved for use by the underlying phy driver. Acked-by: Kosta Zertsekel <[email protected]> Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-12-03net/cadence: remove __dev* attributesBill Pemberton2-6/+6
CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Signed-off-by: Bill Pemberton <[email protected]> Cc: Nicolas Ferre <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-11-23net/macb: GEM DMA configuration register updateNicolas Ferre2-2/+19
Add information to the DMA Configuration Register to maximize system performance: - rx/tx packet buffer full memory size - allow possibility to use INCR16 if supported Signed-off-by: Nicolas Ferre <[email protected]> Acked-by: Joachim Eastwood <[email protected] Signed-off-by: David S. Miller <[email protected]>
2012-11-19net/ethernet: remove useless is_valid_ether_addr from drivers ndo_openJoachim Eastwood2-6/+0
If ndo_validate_addr is set to the generic eth_validate_addr function there is no point in calling is_valid_ether_addr from driver ndo_open if ndo_open is not used elsewhere in the driver. With this change is_valid_ether_addr will be called from the generic eth_validate_addr function. So there should be no change in the actual behavior. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-19net/macb: move to circ_buf macros and fix initial conditionNicolas Ferre1-10/+7
Move to circular buffers management macro and correct an error with circular buffer initial condition. Without this patch, the macb_tx_ring_avail() function was not reporting the proper ring availability at startup: macb macb: eth0: BUG! Tx Ring full when queue awake! macb macb: eth0: tx_head = 0, tx_tail = 0 And hanginig forever... I remove the macb_tx_ring_avail() function and use the proven macros from circ_buf.h. CIRC_CNT() is used in the "consumer" part of the driver: macb_tx_interrupt() to match advice from Documentation/circular-buffers.txt. Reported-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-14net/macb: clear unused address registerJoachim Eastwood2-0/+14
Only the first register set is used for matching but we support getting the initial hw addr from any of the registers. To prevent stale entries and false matches clear unused register sets. This most important for the at91_ether driver where u-boot always uses the 2nd register set. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-14net/macb: add support for phy irq via gpio pinJoachim Eastwood1-1/+11
Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/at91_ether: fix comment and style issuesJoachim Eastwood1-60/+51
Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/at91_ether: clean up print outsJoachim Eastwood1-10/+7
Convert all printk's to netdev_ counterparts and fix up some printed texts. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/at91_ether: drop board_data private struct memberJoachim Eastwood2-8/+1
No longer used after gpio phy interrupt support was removed from at91_ether. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/at91_ether: use stat function from macbJoachim Eastwood3-42/+11
Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/at91_ether: use macb functions for get/set hwaddrJoachim Eastwood1-109/+3
Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/macb: export macb_set_hwaddr and macb_get_hwaddrJoachim Eastwood2-3/+7
for usage in at91_ether driver. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/macb: support reversed hw addrJoachim Eastwood1-6/+18
This is used on one AT91RM9200 board where a bootloader stores the Ethernet address in the wrong order. Support this on macb so address setting functions can be shared with the at91_ether driver. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-07net/macb: check all address registers setsJoachim Eastwood1-15/+20
The macb driver in u-boot uses the first register set while the at91_ether driver in u-boot uses the second register set. By checking all register set, like at91_ether does, this code can be shared between the drivers. This only changes behavior on macb if no vaild address is found in the first register set. Signed-off-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-06net: at91_ether: add pinctrl supportJean-Christophe PLAGNIOL-VILLARD1-0/+11
If no pinctrl available just report a warning as some architecture may not need to do anything. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Cc: Nicolas Ferre <[email protected]> Cc: [email protected] Signed-off-by: David S. Miller <[email protected]>
2012-11-06net: at91_ether: add dt supportJean-Christophe PLAGNIOL-VILLARD1-7/+66
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Cc: Nicolas Ferre <[email protected]> Cc: [email protected] Signed-off-by: David S. Miller <[email protected]>
2012-11-03macb: Keep driver's speed/duplex in sync with actual NCFGRVitalii Demianets1-0/+2
When underlying phy driver restores its state very fast after being brought down and up so that macb driver function macb_handle_link_change() was never called with link state "down", driver's internal representation of phy speed and duplex (bp->speed and bp->duplex) didn't change. So, macb driver sees no reason to perform actual write to the NCFGR register, although the speed and duplex settings in that register were reset when interface was brought down and up. In that case actual phy speed and duplex differ from NCFGR settings. The patch fixes that by keeping internal driver representation of speed and duplex in sync with actual content of NCFGR. Signed-off-by: Vitalii Demianets <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-01net/macb: add pinctrl consumer supportJean-Christophe PLAGNIOL-VILLARD1-0/+11
If no pinctrl available just report a warning as some architecture may not need to do anything. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> [[email protected]: adapt the error path, remove unneeded headers] Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-01net/macb: Offset first RX buffer by two bytesHavard Skinnemoen1-7/+16
Make the ethernet frame payload word-aligned, possibly making the memcpy into the skb a bit faster. This will be even more important after we eliminate the copy altogether. Also eliminate the redundant RX_OFFSET constant -- it has the same definition and purpose as NET_IP_ALIGN. Signed-off-by: Havard Skinnemoen <[email protected]> [[email protected]: adapt to newer kernel] Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-01net/macb: better manage tx errorsNicolas Ferre2-54/+113
Handle all TX errors, not only underruns. TX error management is deferred to a dedicated workqueue. Reinitialize the TX ring after treating all remaining frames, and restart the controller when everything has been cleaned up properly. Napi is not stopped during this task as the driver only handles napi for RX for now. With this sequence, we do not need a special check during the xmit method as the packets will be caught by TX disable during workqueue execution. Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-01net/macb: ethtool interface: add register dump featureNicolas Ferre2-0/+43
Add macb_get_regs() ethtool function and its helper function: macb_get_regs_len(). The version field is deduced from the IP revision which gives the "MACB or GEM" information. An additional version field is reserved. Signed-off-by: Nicolas Ferre <[email protected]> Reviewed-by: Ben Hutchings <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-11-01net/macb: clean up ring buffer logicHavard Skinnemoen3-73/+127
Instead of masking head and tail every time we increment them, just let them wrap through UINT_MAX and mask them when subscripting. Add simple accessor functions to do the subscripting properly to minimize the chances of messing this up. This makes the code slightly smaller, and hopefully faster as well. Also, doing the ring buffer management this way will simplify things a lot when making the ring sizes configurable in the future. Available number of descriptors in ring buffer function by David Laight. Signed-off-by: Havard Skinnemoen <[email protected]> [[email protected]: split patch in topics, adapt to newer kernel] Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Joachim Eastwood <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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