mirror of https://github.com/torvalds/linux.git
442866ff97
When "NETDEV WATCHDOG: em4 (bnx2x): transmit queue 2 timed out" occurs,
BNX2X_SP_RTNL_TX_TIMEOUT is set. In the function bnx2x_sp_rtnl_task,
bnx2x_nic_unload and bnx2x_nic_load are executed to shutdown and open
NIC. In the function bnx2x_nic_load, bnx2x_alloc_mem allocates dma
failure. The message "bnx2x: [bnx2x_alloc_mem:8399(em4)]Can't
allocate memory" pops out. The variable slowpath is set to NULL.
When shutdown the NIC, the function bnx2x_nic_unload is called. In
the function bnx2x_nic_unload, the following functions are executed.
bnx2x_chip_cleanup
bnx2x_set_storm_rx_mode
bnx2x_set_q_rx_mode
bnx2x_set_q_rx_mode
bnx2x_config_rx_mode
bnx2x_set_rx_mode_e2
In the function bnx2x_set_rx_mode_e2, the variable slowpath is operated.
Then the crash occurs.
To fix this crash, the variable slowpath is checked. And in the function
bnx2x_sp_rtnl_task, after dma memory allocation fails, another shutdown
and open NIC is executed.
CC: Joe Jin <joe.jin@oracle.com>
CC: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Acked-by: Ariel Elior <aelior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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|---|---|---|
| .. | ||
| bnx2x | ||
| bnxt | ||
| genet | ||
| Kconfig | ||
| Makefile | ||
| b44.c | ||
| b44.h | ||
| bcm63xx_enet.c | ||
| bcm63xx_enet.h | ||
| bcmsysport.c | ||
| bcmsysport.h | ||
| bgmac-bcma-mdio.c | ||
| bgmac-bcma.c | ||
| bgmac-platform.c | ||
| bgmac.c | ||
| bgmac.h | ||
| bnx2.c | ||
| bnx2.h | ||
| bnx2_fw.h | ||
| cnic.c | ||
| cnic.h | ||
| cnic_defs.h | ||
| cnic_if.h | ||
| sb1250-mac.c | ||
| tg3.c | ||
| tg3.h | ||