unimore/kernel-hacking-2024-linux-steffo
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scsi: qla2xxx: Use QP lock to search for bsg

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On bsg timeout, hardware_lock is used as part of search for the srb.
Instead, qpair lock should be used to iterate through different qpair.

Cc: stable@vger.kernel.org
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20240710171057.35066-11-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Quinn Tran 2024-07-10 22:40:56 +05:30 committed by Martin K. Petersen
parent beafd69246
commit c449b41987
1 changed files with 57 additions and 39 deletions
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96
drivers/scsi/qla2xxx/qla_bsg.c
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@ -3059,16 +3059,60 @@ qla24xx_bsg_request(struct bsg_job *bsg_job)
return ret;
}
static bool qla_bsg_found(struct qla_qpair *qpair, struct bsg_job *bsg_job)
{
bool found = false;
struct fc_bsg_reply *bsg_reply = bsg_job->reply;
scsi_qla_host_t *vha = shost_priv(fc_bsg_to_shost(bsg_job));
struct qla_hw_data *ha = vha->hw;
srb_t *sp = NULL;
int cnt;
unsigned long flags;
struct req_que *req;
spin_lock_irqsave(qpair->qp_lock_ptr, flags);
req = qpair->req;
for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
sp = req->outstanding_cmds[cnt];
if (sp &&
(sp->type == SRB_CT_CMD ||
sp->type == SRB_ELS_CMD_HST ||
sp->type == SRB_ELS_CMD_HST_NOLOGIN) &&
sp->u.bsg_job == bsg_job) {
req->outstanding_cmds[cnt] = NULL;
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
if (!ha->flags.eeh_busy && ha->isp_ops->abort_command(sp)) {
ql_log(ql_log_warn, vha, 0x7089,
"mbx abort_command failed.\n");
bsg_reply->result = -EIO;
} else {
ql_dbg(ql_dbg_user, vha, 0x708a,
"mbx abort_command success.\n");
bsg_reply->result = 0;
}
/* ref: INIT */
kref_put(&sp->cmd_kref, qla2x00_sp_release);
found = true;
goto done;
}
}
spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
done:
return found;
}
int
qla24xx_bsg_timeout(struct bsg_job *bsg_job)
{
struct fc_bsg_reply *bsg_reply = bsg_job->reply;
scsi_qla_host_t *vha = shost_priv(fc_bsg_to_shost(bsg_job));
struct qla_hw_data *ha = vha->hw;
srb_t *sp;
int cnt, que;
unsigned long flags;
struct req_que *req;
int i;
struct qla_qpair *qpair;
ql_log(ql_log_info, vha, 0x708b, "%s CMD timeout. bsg ptr %p.\n",
__func__, bsg_job);
@ -3079,48 +3123,22 @@ qla24xx_bsg_timeout(struct bsg_job *bsg_job)
qla_pci_set_eeh_busy(vha);
}
if (qla_bsg_found(ha->base_qpair, bsg_job))
goto done;
/* find the bsg job from the active list of commands */
spin_lock_irqsave(&ha->hardware_lock, flags);
for (que = 0; que < ha->max_req_queues; que++) {
req = ha->req_q_map[que];
if (!req)
for (i = 0; i < ha->max_qpairs; i++) {
qpair = vha->hw->queue_pair_map[i];
if (!qpair)
continue;
for (cnt = 1; cnt < req->num_outstanding_cmds; cnt++) {
sp = req->outstanding_cmds[cnt];
if (sp &&
(sp->type == SRB_CT_CMD ||
sp->type == SRB_ELS_CMD_HST ||
sp->type == SRB_ELS_CMD_HST_NOLOGIN ||
sp->type == SRB_FXIOCB_BCMD) &&
sp->u.bsg_job == bsg_job) {
req->outstanding_cmds[cnt] = NULL;
spin_unlock_irqrestore(&ha->hardware_lock, flags);
if (!ha->flags.eeh_busy && ha->isp_ops->abort_command(sp)) {
ql_log(ql_log_warn, vha, 0x7089,
"mbx abort_command failed.\n");
bsg_reply->result = -EIO;
} else {
ql_dbg(ql_dbg_user, vha, 0x708a,
"mbx abort_command success.\n");
bsg_reply->result = 0;
}
spin_lock_irqsave(&ha->hardware_lock, flags);
goto done;
}
}
if (qla_bsg_found(qpair, bsg_job))
goto done;
}
spin_unlock_irqrestore(&ha->hardware_lock, flags);
ql_log(ql_log_info, vha, 0x708b, "SRB not found to abort.\n");
bsg_reply->result = -ENXIO;
return 0;
done:
spin_unlock_irqrestore(&ha->hardware_lock, flags);
/* ref: INIT */
kref_put(&sp->cmd_kref, qla2x00_sp_release);
return 0;
}