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213a9922d1
linux/drivers/net/ethernet
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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
..
3com net: typhoon: Remove redundant casts 2014-10-24 00:41:31 -04:00
8390 PCI changes for the v3.17 merge window (part 2): 2014-08-14 18:10:33 -06:00
adaptec PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
adi net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
aeroflex greth: moved TX ring cleaning to NAPI rx poll func 2014-09-05 21:57:09 -07:00
agere et131x: Add PCIe gigabit ethernet driver et131x to drivers/net 2014-10-03 12:22:19 -07:00
allwinner net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
alteon PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
altera Altera TSE: Add support for no PHY 2014-10-05 21:39:40 -04:00
amd amd-xgbe: IRQ names require allocated memory 2014-12-09 13:13:39 -05:00
apm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-11-06 22:01:18 -05:00
apple
arc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-09-23 12:09:27 -04:00
atheros PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
broadcom net: systemport: allow changing MAC address 2014-12-09 18:26:08 -05:00
brocade bna: use netdev_rss_key_fill() helper 2014-11-16 15:59:11 -05:00
cadence net: macb: Remove obsolete comment from Kconfig 2014-12-09 15:39:38 -05:00
calxeda net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
chelsio chelsio: fix misspelling of current function in string 2014-12-09 16:18:47 -05:00
cirrus cirrus/mac89x0: Remove superfluous interrupt disable/restore 2014-10-24 00:43:28 -04:00
cisco enic: use netdev_rss_key_fill() helper 2014-11-23 21:01:42 -05:00
davicom net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
dec uli526x: fix misspelling of current function in string 2014-12-09 16:18:46 -05:00
dlink PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
emulex ethtool: Support for configurable RSS hash function 2014-12-08 21:07:10 -05:00
faraday
freescale net: fec: avoid kernal crash by NULL pointer when no phy connection 2014-12-09 18:29:13 -05:00
fujitsu drivers/net: ethernet: Remove typedef for struct and enum 2014-08-07 16:02:58 -07:00
hisilicon
hp hp100: fix misspelling of current function in string 2014-12-09 16:18:47 -05:00
i825xx
ibm IBM-EMAC: Deletion of unnecessary checks before the function call "of_dev_put" 2014-11-21 15:14:12 -05:00
icplus PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
intel i40e/i40evf: Convert macro to static inline 2014-12-09 12:57:05 -08:00
marvell sky2: Fix crash inside sky2_rx_clean 2014-11-26 15:16:40 -05:00
mellanox net/mlx4_en: Support for configurable RSS hash function 2014-12-08 21:07:10 -05:00
micrel net: ks8842: use dmaengine_terminate_all() API 2014-10-15 21:31:00 +05:30
microchip
moxa net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
myricom myri10ge: use eth_skb_pad helper 2014-12-08 20:47:42 -05:00
natsemi natsemi/macsonic: Remove superfluous interrupt disable/restore 2014-10-24 00:43:28 -04:00
neterion net: ethernet: neterion: vxge: vxge-main.c: Cleaning up missing null-terminate in conjunction with strncpy 2014-09-15 14:17:00 -04:00
nuvoton net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
nvidia ethernet: nvidia: Remove extra parens 2014-09-02 13:47:25 -07:00
nxp net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
octeon drivers: net: ethernet: octeon_mgmt: fix a compiler warning 2014-09-08 14:23:46 -07:00
oki-semi pch_gbe: 'select' NET_PTP_CLASSIFY. 2014-09-22 13:25:51 -04:00
packetengines drivers/net: Convert remaining uses of pr_warning to pr_warn 2014-09-09 20:37:08 -07:00
pasemi net-PA Semi: Deletion of unnecessary checks before the function call "pci_dev_put" 2014-12-05 21:14:20 -08:00
qlogic net: rename netdev_phys_port_id to more generic name 2014-12-02 20:01:19 -08:00
qualcomm net: qualcomm: Fix dependency 2014-11-11 18:12:32 -05:00
rdc PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
realtek r8169: Use eth_skb_pad function 2014-12-08 20:47:42 -05:00
renesas sh_eth: Remove redundant alignment adjustment 2014-12-09 18:05:08 -05:00
rocker rocker: remove swdev mode 2014-12-09 18:24:47 -05:00
samsung ethernet: samsung: sxgbe: remove unnecessary check 2014-10-27 19:16:02 -04:00
seeq
sfc ethtool: Support for configurable RSS hash function 2014-12-08 21:07:10 -05:00
sgi PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
silan PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
sis PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
smsc net/smsc911x: Add minimal runtime PM support 2014-11-24 16:41:50 -05:00
stmicro stmmac: pci: allocate memory resources dynamically 2014-12-05 21:03:48 -08:00
sun sunvnet: fix incorrect rcu_read_unlock() in vnet_start_xmit() 2014-12-08 21:55:01 -05:00
tehuti PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
ti drivers: net : cpsw: Update Kconfig for CPSW 2014-12-09 13:44:16 -05:00
tile Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
toshiba net: spider_net: avoid using signed char for bitops 2014-10-05 21:15:16 -04:00
tundra
via Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-10-07 21:16:26 -04:00
wiznet ethernet: wiznet: remove unnecessary check 2014-10-27 19:16:01 -04:00
xilinx net: Xilinx: Deletion of unnecessary checks before two function calls 2014-11-21 15:14:12 -05:00
xircom ethernet: amd: Remove typedef local_info_t 2014-08-11 12:19:53 -07:00
xscale
dnet.c
dnet.h
ec_bhf.c net: ec_bhf: remove excessive debug messages 2014-08-24 18:36:57 -07:00
ethoc.c net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
fealnx.c PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
jme.c PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use 2014-08-12 12:15:14 -06:00
jme.h
Kconfig rocker: introduce rocker switch driver 2014-12-02 20:01:24 -08:00
korina.c
lantiq_etop.c net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
Makefile rocker: introduce rocker switch driver 2014-12-02 20:01:24 -08:00
netx-eth.c net: ethernet: Remove superfluous ether_setup after alloc_etherdev 2014-10-03 15:31:40 -07:00
s6gmac.c