Zumeng Chen 034317d43f gianfar: fix a flooded alignment reports because of padding issue. ... [ Upstream commit 58117672943734715bbe7565ac9f062effa524f0 ] According to LS1021A RM, the value of PAL can be set so that the start of the IP header in the receive data buffer is aligned to a 32-bit boundary. Normally, setting PAL = 2 provides minimal padding to ensure such alignment of the IP header. However every incoming packet's 8-byte time stamp will be inserted into the packet data buffer as padding alignment bytes when hardware time stamping is enabled. So we set the padding 8+2 here to avoid the flooded alignment faults: root@128:~# cat /proc/cpu/alignment User: 0 System: 17539 (inet_gro_receive+0x114/0x2c0) Skipped: 0 Half: 0 Word: 0 DWord: 0 Multi: 17539 User faults: 2 (fixup) Also shown when exception report enablement CPU: 0 PID: 161 Comm: irq/66-eth1_g0_ Not tainted 4.1.21-rt13-WR8.0.0.0_preempt-rt #16 Hardware name: Freescale LS1021A [<8001b420>] (unwind_backtrace) from [<8001476c>] (show_stack+0x20/0x24) [<8001476c>] (show_stack) from [<807cfb48>] (dump_stack+0x94/0xac) [<807cfb48>] (dump_stack) from [<80025d70>] (do_alignment+0x720/0x958) [<80025d70>] (do_alignment) from [<80009224>] (do_DataAbort+0x40/0xbc) [<80009224>] (do_DataAbort) from [<80015398>] (__dabt_svc+0x38/0x60) Exception stack(0x86ad1cc0 to 0x86ad1d08) 1cc0: f9b3e080 86b3d072 2d78d287 00000000 866816c0 86b3d05e 86e785d0 00000000 1ce0: 00000011 0000000e 80840ab0 86ad1d3c 86ad1d08 86ad1d08 806d7fc0 806d806c 1d00: 40070013 ffffffff [<80015398>] (__dabt_svc) from [<806d806c>] (inet_gro_receive+0x114/0x2c0) [<806d806c>] (inet_gro_receive) from [<80660eec>] (dev_gro_receive+0x21c/0x3c0) [<80660eec>] (dev_gro_receive) from [<8066133c>] (napi_gro_receive+0x44/0x17c) [<8066133c>] (napi_gro_receive) from [<804f0538>] (gfar_clean_rx_ring+0x39c/0x7d4) [<804f0538>] (gfar_clean_rx_ring) from [<804f0bf4>] (gfar_poll_rx_sq+0x58/0xe0) [<804f0bf4>] (gfar_poll_rx_sq) from [<80660b10>] (net_rx_action+0x27c/0x43c) [<80660b10>] (net_rx_action) from [<80033638>] (do_current_softirqs+0x1e0/0x3dc) [<80033638>] (do_current_softirqs) from [<800338c4>] (__local_bh_enable+0x90/0xa8) [<800338c4>] (__local_bh_enable) from [<8008025c>] (irq_forced_thread_fn+0x70/0x84) [<8008025c>] (irq_forced_thread_fn) from [<800805e8>] (irq_thread+0x16c/0x244) [<800805e8>] (irq_thread) from [<8004e490>] (kthread+0xe8/0x104) [<8004e490>] (kthread) from [<8000fda8>] (ret_from_fork+0x14/0x2c) Signed-off-by: Zumeng Chen <zumeng.chen@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-02-25 11:03:40 +01:00
..
fs_enet	82xx: FCC: Fixing a bug causing to FCC port lock-up	2015-12-16 18:32:35 -05:00
fec.h	net: fec: introduce fec_ptp_stop and use in probe fail path	2015-07-26 21:51:53 -07:00
fec_main.c	net: fec: fix multicast filtering hardware setup	2017-12-09 18:42:43 +01:00
fec_mpc52xx.c	net/fsl: constify of_device_id array	2015-03-17 15:00:21 -04:00
fec_mpc52xx.h
fec_mpc52xx_phy.c	net/fsl: constify of_device_id array	2015-03-17 15:00:21 -04:00
fec_ptp.c	net: fec: avoid timespec use	2015-10-05 03:16:39 -07:00
fsl_pq_mdio.c	net: fsl: avoid 64-bit warning on pq_mdio	2015-12-08 22:51:56 -05:00
gianfar.c	gianfar: fix a flooded alignment reports because of padding issue.	2018-02-25 11:03:40 +01:00
gianfar.h	gianfar: Don't enable RX Filer if not supported	2015-12-16 18:31:00 -05:00
gianfar_ethtool.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-11-01 00:15:30 -04:00
gianfar_ptp.c	net: fsl: Fix error checking for platform_get_irq()	2015-11-30 15:19:44 -05:00
Kconfig	net: fsl: expands dependencies of NET_VENDOR_FREESCALE	2015-11-23 12:11:58 -05:00
Makefile
ucc_geth.c	net: fix phy refcounting in a bunch of drivers	2015-09-24 23:04:53 -07:00
ucc_geth.h
ucc_geth_ethtool.c	drivers/net: get rid of unnecessary initializations in .get_drvinfo()	2015-10-16 00:24:10 -07:00
xgmac_mdio.c	net/fsl: constify of_device_id array	2015-03-17 15:00:21 -04:00