This patch fixes a crash on qla2x00_mailbox_command caused when the driver
is on UNLOADING state and tries to call qla2x00_poll, which triggers a
NULL pointer dereference.
Signed-off-by: Rodrigo R. Galvao <rosattig@linux.vnet.ibm.com>
Signed-off-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
if (time_after(jiffies, wait_time))
break;
+ /*
+ * Check if it's UNLOADING, cause we cannot poll in
+ * this case, or else a NULL pointer dereference
+ * is triggered.
+ */
+ if (unlikely(test_bit(UNLOADING, &base_vha->dpc_flags)))
+ return QLA_FUNCTION_TIMEOUT;
+
/* Check for pending interrupts. */
qla2x00_poll(ha->rsp_q_map[0]);