redonkable/alistair23-linux
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[SCSI] qla2xxx: Ensure there's enough request-queue space for passthru IOCBs.

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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>
This commit is contained in:
Andrew Vasquez 2011-11-18 09:03:20 -08:00 committed by James Bottomley
parent a00f6296aa
commit 5780790ee6
4 changed files with 27 additions and 2 deletions
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16
drivers/scsi/qla2xxx/qla_bsg.c
View file

@ -31,6 +31,7 @@ qla2x00_get_ctx_bsg_sp(scsi_qla_host_t *vha, fc_port_t *fcport, size_t size)
memset(sp, 0, sizeof(*sp));
sp->fcport = fcport;
sp->ctx = ctx;
ctx->iocbs = 1;
done:
return sp;
}
@ -389,6 +390,20 @@ done:
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 @@ qla2x00_process_ct(struct fc_bsg_job *bsg_job)
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,

1
drivers/scsi/qla2xxx/qla_def.h
View file

@ -271,6 +271,7 @@ struct srb_iocb {
struct srb_ctx {
uint16_t type;
char *name;
int iocbs;
union {
struct srb_iocb *iocb_cmd;
struct fc_bsg_job *bsg_job;

1
drivers/scsi/qla2xxx/qla_init.c
View file

@ -111,6 +111,7 @@ qla2x00_get_ctx_sp(scsi_qla_host_t *vha, fc_port_t *fcport, size_t size,
memset(sp, 0, sizeof(*sp));
sp->fcport = fcport;
sp->ctx = ctx;
ctx->iocbs = 1;
ctx->u.iocb_cmd = iocb;
iocb->free = qla2x00_ctx_sp_free;

11
drivers/scsi/qla2xxx/qla_iocb.c
View file

@ -1818,6 +1818,7 @@ qla2x00_alloc_iocbs(scsi_qla_host_t *vha, srb_t *sp)
uint32_t index, handle;
request_t *pkt;
uint16_t cnt, req_cnt;
struct srb_ctx *ctx;
pkt = NULL;
req_cnt = 1;
@ -1846,6 +1847,12 @@ qla2x00_alloc_iocbs(scsi_qla_host_t *vha, srb_t *sp)
req->outstanding_cmds[handle] = sp;
sp->handle = handle;
/* Adjust entry-counts as needed. */
if (sp->ctx) {
ctx = sp->ctx;
req_cnt = ctx->iocbs;
}
skip_cmd_array:
/* Check for room on request queue. */
if (req->cnt < req_cnt) {
@ -2622,8 +2629,8 @@ qla2x00_start_sp(srb_t *sp)
break;
case SRB_CT_CMD:
IS_FWI2_CAPABLE(ha) ?
qla24xx_ct_iocb(sp, pkt) :
qla2x00_ct_iocb(sp, pkt);
qla24xx_ct_iocb(sp, pkt) :
qla2x00_ct_iocb(sp, pkt);
break;
case SRB_ADISC_CMD:
IS_FWI2_CAPABLE(ha) ?