Nimrod Andy 213a9922d1 net: fec: avoid kernal crash by NULL pointer when no phy connection ... On i.MX6SX sabreauto board, when there have no phy daughter board connection, there have kernel crash by NULL pointer: fec 2188000.ethernet eth0: could not attach to PHY Unable to handle kernel NULL pointer dereference at virtual address 00000220 pgd = 80004000 [00000220] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.24-01042-g27eaeea-dirty #405 task: d8078000 ti: d8076000 task.ti: d8076000 PC is at mutex_lock+0x10/0x54 LR is at phy_start+0x14/0x68 pc : [<806ad4e4>] lr : [<803b0f90>] psr: 60000113 sp : d8077d80 ip : 00000000 fp : d83cc000 r10: 0000100c r9 : d83cc800 r8 : 00000000 r7 : d83bcd0c r6 : 00000200 r5 : 00000220 r4 : 00000220 r3 : 00000000 r2 : 00000000 r1 : d83bcd90 r0 : 00000220 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c5387d Table: 8000404a DAC: 00000015 Process swapper/0 (pid: 1, stack limit = 0xd8076240) Stack: (0xd8077d80 to 0xd8078000) 7d80: 00000000 803b0f90 00000001 00000000 d83bc800 803be034 00000007 805c3fb4 7da0: 00000003 80d4e0bc 805efcb8 fffffff1 fffffff0 00000000 00000000 d8077dfc 7dc0: 0000000d 80d6ce80 80d126b0 800499c8 d83bc800 d83bc800 806f0f40 d83bc82c 7de0: 00000000 00000000 80d6ce80 80d126b0 0000016b 80540250 d8076008 d83bc800 7e00: 0000016b d83bc800 00001003 00000001 00001002 805404d4 d83bc800 00000120 7e20: 00001002 00001002 00000000 805405d4 d83bc800 00000001 80d126c0 00001002 7e40: 80dbc5dc 80d02024 00000000 806ae360 00000002 d6128420 d6127198 12400000 7e60: 00000000 00000000 00000002 d61271e8 00000000 12400000 d801674c 800e49f0 7e80: d6127198 d6124e58 00000000 80238848 d61271c4 00000000 00000001 d8016700 7ea0: 80dd2e00 80d752c0 80d752c0 80cfdaec 0000010c 80239430 806c2e90 d800f080 7ec0: d800f380 804e46b4 ffffffbc 80d15cb0 00000007 80d752c0 80d752c0 80d01e94 7ee0: 0000010c d8076030 00000000 800088cc 80dbaba4 80bd411c d80a6f00 806b1e04 7f00: 00000000 00000000 00000000 80125b84 00000000 80d2c56c 60000113 00000001 7f20: ef7ff9df 806c80cc 0000010c 80043f5c 80c95eb8 00000007 ef7ffa1d 00000007 7f40: 80d2c55c 80d15cb0 00000007 80d752c0 80d752c0 80ccc50c 0000010c 80d0a114 7f60: 80d0a10c 80cccc04 00000007 00000007 80ccc50c 806ae410 00000000 8004cb84 7f80: 80d17bc0 00000000 806a4bd4 00000000 00000000 00000000 00000000 00000000 7fa0: 00000000 806a4bdc 00000000 8000e5f8 00000000 00000000 00000000 00000000 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 1e79a7bb e5337f77 [<806ad4e4>] (mutex_lock) from [<803b0f90>] (phy_start+0x14/0x68) [<803b0f90>] (phy_start) from [<803be034>] (fec_enet_open+0x448/0x5dc) [<803be034>] (fec_enet_open) from [<80540250>] (__dev_open+0xa8/0x110) [<80540250>] (__dev_open) from [<805404d4>] (__dev_change_flags+0x88/0x170) [<805404d4>] (__dev_change_flags) from [<805405d4>] (dev_change_flags+0x18/0x48) [<805405d4>] (dev_change_flags) from [<80d02024>] (ip_auto_config+0x190/0xf94) [<80d02024>] (ip_auto_config) from [<800088cc>] (do_one_initcall+0xe8/0x144) [<800088cc>] (do_one_initcall) from [<80cccc04>] (kernel_init_freeable+0x104/0x1c8) [<80cccc04>] (kernel_init_freeable) from [<806a4bdc>] (kernel_init+0x8/0xec) [<806a4bdc>] (kernel_init) from [<8000e5f8>] (ret_from_fork+0x14/0x3c) Code: e92d4010 e3a03000 e1a04000 ee073fba (e1903f9f) Add phydev check to fix the issue. Signed-off-by: Fugang Duan <B38611@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-12-09 18:29:13 -05:00
..
fs_enet	net: fs_enet: set back promiscuity mode after restart	2014-10-22 15:33:13 -04:00
fec_main.c	net: fec: avoid kernal crash by NULL pointer when no phy connection	2014-12-09 18:29:13 -05:00
fec_mpc52xx_phy.c	net: fec_mpc52xx_phy: remove unnecessary dev_set_drvdata()	2013-08-21 12:27:04 -07:00
fec_mpc52xx.c	fec_mpc52xx: delete unneeded test before of_node_put	2014-08-08 10:28:08 -07:00
fec_mpc52xx.h	drivers/net: fix up stale paths from driver reorg	2012-01-30 12:54:40 -05:00
fec_ptp.c	net: fec: ptp: fix convergence issue to support LinuxPTP stack	2014-10-15 16:40:11 -04:00
fec.h	net: fec: init maximum receive buffer size for ring1 and ring2	2014-11-24 15:22:57 -05:00
fsl_pq_mdio.c	net/fsl_pq_mdio: Replace spin_event_timeout() with arch independent	2014-10-09 01:40:37 -04:00
gianfar_ethtool.c	gianfar: Implement PAUSE frame generation support	2014-10-29 14:33:16 -04:00
gianfar_ptp.c	ptp: drivers: set the number of programmable pins.	2014-03-21 14:21:14 -04:00
gianfar.c	gianfar: Implement PAUSE frame generation support	2014-10-29 14:33:16 -04:00
gianfar.h	gianfar: Implement PAUSE frame generation support	2014-10-29 14:33:16 -04:00
Kconfig	net/fsl: xgmac_mdio is dependent on OF_MDIO	2014-06-11 15:50:59 -07:00
Makefile	gianfar: Remove sysfs stubs for FIFOCFG and stashing	2014-02-18 15:03:02 -05:00
ucc_geth_ethtool.c	net: get rid of SET_ETHTOOL_OPS	2014-05-13 17:43:20 -04:00
ucc_geth.c	net: ucc_geth: fix build failure	2014-08-10 21:40:15 -07:00
ucc_geth.h	net: remove skb recycling	2012-10-07 00:40:54 -04:00
xgmac_mdio.c	net/fsl: Add format length modifier to avoid negative values	2014-07-30 19:58:09 -07:00