[SCSI] qla2xxx: Ensure there's enough request-queue space for passthru IOCBs.
The driver should ensure there's a sufficient number of IOCBs
to satisfy the number of scatter-gather entries specified in the
command. Add a 'count' to the control structure, srb_ctx, to use
in qla2x00_alloc_iocbs().
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index c0bc0c6..b1d0f93 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -31,6 +31,7 @@
memset(sp, 0, sizeof(*sp));
sp->fcport = fcport;
sp->ctx = ctx;
+ ctx->iocbs = 1;
done:
return sp;
}
@@ -389,6 +390,20 @@
return rval;
}
+inline uint16_t
+qla24xx_calc_ct_iocbs(uint16_t dsds)
+{
+ uint16_t iocbs;
+
+ iocbs = 1;
+ if (dsds > 2) {
+ iocbs += (dsds - 2) / 5;
+ if ((dsds - 2) % 5)
+ iocbs++;
+ }
+ return iocbs;
+}
+
static int
qla2x00_process_ct(struct fc_bsg_job *bsg_job)
{
@@ -489,6 +504,7 @@
ct = sp->ctx;
ct->type = SRB_CT_CMD;
ct->name = "bsg_ct";
+ ct->iocbs = qla24xx_calc_ct_iocbs(req_sg_cnt + rsp_sg_cnt);
ct->u.bsg_job = bsg_job;
ql_dbg(ql_dbg_user, vha, 0x7016,