Commit 1bd58b89 authored Sep 03, 2010 by Giridhar Malavali Committed by James Bottomley Sep 05, 2010

[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: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

parent 0374f55e

drivers/scsi/qla2xxx/qla_nx.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -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