Commit 1bd58b89 authored by Giridhar Malavali's avatar Giridhar Malavali Committed by James Bottomley

[SCSI] qla2xxx: Check for empty slot in request queue before posting Command type 6 request.

For ISP82xx, the check for empty slot in request queue before posting command type 6
request was missing. This could lead to request queue entry corruptions causing
IO timeouts.
Signed-off-by: default avatarGiridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@suse.de>
parent 0374f55e
......@@ -2672,6 +2672,19 @@ qla82xx_start_scsi(srb_t *sp)
sufficient_dsds:
req_cnt = 1;
if (req->cnt < (req_cnt + 2)) {
cnt = (uint16_t)RD_REG_DWORD_RELAXED(
&reg->req_q_out[0]);
if (req->ring_index < cnt)
req->cnt = cnt - req->ring_index;
else
req->cnt = req->length -
(req->ring_index - cnt);
}
if (req->cnt < (req_cnt + 2))
goto queuing_error;
ctx = sp->ctx = mempool_alloc(ha->ctx_mempool, GFP_ATOMIC);
if (!sp->ctx) {
DEBUG(printk(KERN_INFO
......
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