[PATCH 5.4 143/214] Revert "scsi: qla2xxx: Fix crash on qla2x00_mailbox_command"

[Greg Kroah-Hartman]

From: Saurav Kashyap <skashyap@xxxxxxxxxxx>

[ Upstream commit de7e6194301ad31c4ce95395eb678e51a1b907e5 ]

FCoE adapter initialization failed for ISP8021 with the following patch
applied. In addition, reproduction of the issue the patch originally tried
to address has been unsuccessful.

This reverts commit 3cb182b3fa8b7a61f05c671525494697cba39c6a.

Link: https://lore.kernel.org/r/20200806111014.28434-11-njavali@xxxxxxxxxxx
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Saurav Kashyap <skashyap@xxxxxxxxxxx>
Signed-off-by: Nilesh Javali <njavali@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/qla2xxx/qla_mbx.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 62a16463f0254..c1631e42d35d1 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -335,14 +335,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			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]);
 
-- 
2.25.1