Sankar Patchineelam 2247925f09
bnxt_en: Fix NULL pointer dereference in reopen failure path ...
Net device reset can fail when the h/w or f/w is in a bad state.
Subsequent netdevice open fails in bnxt_hwrm_stat_ctx_alloc().
The cleanup invokes bnxt_hwrm_resource_free() which inturn
calls bnxt_disable_int(). In this routine, the code segment
if (ring->fw_ring_id != INVALID_HW_RING_ID)
BNXT_CP_DB(cpr->cp_doorbell, cpr->cp_raw_cons);
results in NULL pointer dereference as cpr->cp_doorbell is not yet
initialized, and fw_ring_id is zero.
The fix is to initialize cpr fw_ring_id to INVALID_HW_RING_ID before
bnxt_init_chip() is invoked.
Signed-off-by: Sankar Patchineelam <sankar.patchineelam@broadcom.com >
Signed-off-by: Michael Chan <michael.chan@broadcom.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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2247925f09