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If the registration fails then mdio_unregister is called. However at unbind the unregister ia attempted again resulting in the below crash [ 73.544038] kernel BUG at drivers/net/phy/mdio_bus.c:415! [ 73.549362] Internal error: Oops - BUG: 0 [#1] SMP [ 73.554127] Modules linked in: [ 73.557168] CPU: 0 PID: 2249 Comm: sh Not tainted 4.14.0 #183 [ 73.562895] Hardware name: xlnx,zynqmp (DT) [ 73.567062] task: ffffffc879e41180 task.stack: ffffff800cbe0000 [ 73.572973] PC is at mdiobus_unregister+0x84/0x88 [ 73.577656] LR is at axienet_mdio_teardown+0x18/0x30 [ 73.582601] pc : [<ffffff80085fa4cc>] lr : [<ffffff8008616858>] pstate: 20000145 [ 73.589981] sp : ffffff800cbe3c30 [ 73.593277] x29: ffffff800cbe3c30 x28: ffffffc879e41180 [ 73.598573] x27: ffffff8008a21000 x26: 0000000000000040 [ 73.603868] x25: 0000000000000124 x24: ffffffc879efe920 [ 73.609164] x23: 0000000000000060 x22: ffffffc879e02000 [ 73.614459] x21: ffffffc879e02800 x20: ffffffc87b0b8870 [ 73.619754] x19: ffffffc879e02800 x18: 000000000000025d [ 73.625050] x17: 0000007f9a719ad0 x16: ffffff8008195bd8 [ 73.630345] x15: 0000007f9a6b3d00 x14: 0000000000000010 [ 73.635640] x13: 74656e7265687465 x12: 0000000000000030 [ 73.640935] x11: 0000000000000030 x10: 0101010101010101 [ 73.646231] x9 : 241f394f42533300 x8 : ffffffc8799f6e98 [ 73.651526] x7 : ffffffc8799f6f18 x6 : ffffffc87b0ba318 [ 73.656822] x5 : ffffffc87b0ba498 x4 : 0000000000000000 [ 73.662117] x3 : 0000000000000000 x2 : 0000000000000008 [ 73.667412] x1 : 0000000000000004 x0 : ffffffc8799f4000 [ 73.672708] Process sh (pid: 2249, stack limit = 0xffffff800cbe0000) Fix the same by making the bus NULL on unregister. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| 3com | ||
| 8390 | ||
| adaptec | ||
| aeroflex | ||
| agere | ||
| alacritech | ||
| allwinner | ||
| alteon | ||
| altera | ||
| amazon | ||
| amd | ||
| apm | ||
| apple | ||
| aquantia | ||
| arc | ||
| atheros | ||
| aurora | ||
| broadcom | ||
| brocade | ||
| cadence | ||
| calxeda | ||
| cavium | ||
| chelsio | ||
| cirrus | ||
| cisco | ||
| cortina | ||
| davicom | ||
| dec | ||
| dlink | ||
| emulex | ||
| ezchip | ||
| faraday | ||
| freescale | ||
| fujitsu | ||
| hisilicon | ||
| hp | ||
| huawei | ||
| i825xx | ||
| ibm | ||
| intel | ||
| marvell | ||
| mediatek | ||
| mellanox | ||
| micrel | ||
| microchip | ||
| moxa | ||
| mscc | ||
| myricom | ||
| natsemi | ||
| neterion | ||
| netronome | ||
| ni | ||
| nuvoton | ||
| nvidia | ||
| nxp | ||
| oki-semi | ||
| packetengines | ||
| pasemi | ||
| qlogic | ||
| qualcomm | ||
| rdc | ||
| realtek | ||
| renesas | ||
| rocker | ||
| samsung | ||
| seeq | ||
| sfc | ||
| sgi | ||
| silan | ||
| sis | ||
| smsc | ||
| socionext | ||
| stmicro | ||
| sun | ||
| synopsys | ||
| tehuti | ||
| ti | ||
| toshiba | ||
| tundra | ||
| via | ||
| wiznet | ||
| xilinx | ||
| xircom | ||
| xscale | ||
| dnet.c | ||
| dnet.h | ||
| ec_bhf.c | ||
| ethoc.c | ||
| fealnx.c | ||
| jme.c | ||
| jme.h | ||
| Kconfig | ||
| korina.c | ||
| lantiq_etop.c | ||
| Makefile | ||
| netx-eth.c | ||