diff options
| author | Somnath Kotur <somnath.kotur@broadcom.com> | 2021-07-18 22:36:31 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-19 18:25:44 +0300 |
| commit | 11a39259ff79b74bc99f8b7c44075a2d6d5e7ab1 (patch) | |
| tree | 07ceddea97a034c485d907a8c7ac74c23e224ebe /drivers/net/ethernet/broadcom | |
| parent | 96bdd4b9ea7ef9a12db8fdd0ce90e37dffbd3703 (diff) | |
| download | linux-11a39259ff79b74bc99f8b7c44075a2d6d5e7ab1.tar.xz | |
bnxt_en: Check abort error state in bnxt_half_open_nic()
bnxt_half_open_nic() is called during during ethtool self test and is
protected by rtnl_lock. Firmware reset can be happening at the same
time. Only critical portions of the entire firmware reset sequence
are protected by the rtnl_lock. It is possible that bnxt_half_open_nic()
can be called when the firmware reset sequence is aborting. In that
case, bnxt_half_open_nic() needs to check if the ABORT_ERR flag is set
and abort if it is. The ethtool self test will fail but the NIC will be
brought to a consistent IF_DOWN state.
Without this patch, if bnxt_half_open_nic() were to continue in this
error state, it may crash like this:
bnxt_en 0000:82:00.1 enp130s0f1np1: FW reset in progress during close, FW reset will be aborted
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
...
Process ethtool (pid: 333327, stack limit = 0x0000000046476577)
Call trace:
bnxt_alloc_mem+0x444/0xef0 [bnxt_en]
bnxt_half_open_nic+0x24/0xb8 [bnxt_en]
bnxt_self_test+0x2dc/0x390 [bnxt_en]
ethtool_self_test+0xe0/0x1f8
dev_ethtool+0x1744/0x22d0
dev_ioctl+0x190/0x3e0
sock_ioctl+0x238/0x480
do_vfs_ioctl+0xc4/0x758
ksys_ioctl+0x84/0xb8
__arm64_sys_ioctl+0x28/0x38
el0_svc_handler+0xb0/0x180
el0_svc+0x8/0xc
Fixes: a1301f08c5ac ("bnxt_en: Check abort error state in bnxt_open_nic().")
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 169f093e01de..31eb3c00851a 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -10208,6 +10208,12 @@ int bnxt_half_open_nic(struct bnxt *bp) { int rc = 0; + if (test_bit(BNXT_STATE_ABORT_ERR, &bp->state)) { + netdev_err(bp->dev, "A previous firmware reset has not completed, aborting half open\n"); + rc = -ENODEV; + goto half_open_err; + } + rc = bnxt_alloc_mem(bp, false); if (rc) { netdev_err(bp->dev, "bnxt_alloc_mem err: %x\n", rc); |