[PATCH v2 09/13] scsi: fnic: Remove usage of host_lock

Karan Tilak Kumar
2023-10-27T18:04:10Z

Remove usage of host_lock.
Replace with fnic_lock, where necessary.

Reviewed-by: Sesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: Arulprabhu Ponnusamy <arulponn@cisco.com>
Signed-off-by: Karan Tilak Kumar <kartilak@cisco.com>
---
drivers/scsi/fnic/fnic_scsi.c | 27 ++++++---------------------
1 file changed, 6 insertions(+), 21 deletions(-)

diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index f32781f8fdd0..9a1beb3e7269 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -170,17 +170,14 @@ __fnic_set_state_flags(struct fnic *fnic, unsigned long st_flags,
unsigned long clearbits)
{
unsigned long flags = 0;
- unsigned long host_lock_flags = 0;

spin_lock_irqsave(&fnic->fnic_lock, flags);
- spin_lock_irqsave(fnic->lport->host->host_lock, host_lock_flags);

if (clearbits)
fnic->state_flags &= ~st_flags;
else
fnic->state_flags |= st_flags;

- spin_unlock_irqrestore(fnic->lport->host->host_lock, host_lock_flags);
spin_unlock_irqrestore(&fnic->fnic_lock, flags);

return;
@@ -479,12 +476,6 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc)

atomic_inc(&fnic->in_flight);

- /*
- * Release host lock, use driver resource specific locks from here.
- * Don't re-enable interrupts in case they were disabled prior to the
- * caller disabling them.
- */
- spin_unlock(lp->host->host_lock);
fnic_priv(sc)->state = FNIC_IOREQ_NOT_INITED;
fnic_priv(sc)->flags = FNIC_NO_FLAGS;

@@ -569,8 +560,6 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc)
mempool_free(io_req, fnic->io_req_pool);
}
atomic_dec(&fnic->in_flight);
- /* acquire host lock before returning to SCSI */
- spin_lock(lp->host->host_lock);
return ret;
} else {
atomic64_inc(&fnic_stats->io_stats.active_ios);
@@ -598,8 +587,6 @@ static int fnic_queuecommand_lck(struct scsi_cmnd *sc)
spin_unlock_irqrestore(io_lock, flags);

atomic_dec(&fnic->in_flight);
- /* acquire host lock before returning to SCSI */
- spin_lock(lp->host->host_lock);
return ret;
}

@@ -1477,18 +1464,17 @@ static inline int fnic_queue_abort_io_req(struct fnic *fnic, int tag,
struct fnic_io_req *io_req)
{
struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0];
- struct Scsi_Host *host = fnic->lport->host;
struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
unsigned long flags;

- spin_lock_irqsave(host->host_lock, flags);
+ spin_lock_irqsave(&fnic->fnic_lock, flags);
if (unlikely(fnic_chk_state_flags_locked(fnic,
FNIC_FLAGS_IO_BLOCKED))) {
- spin_unlock_irqrestore(host->host_lock, flags);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);
return 1;
} else
atomic_inc(&fnic->in_flight);
- spin_unlock_irqrestore(host->host_lock, flags);
+ spin_unlock_irqrestore(&fnic->fnic_lock, flags);

spin_lock_irqsave(&fnic->wq_copy_lock[0], flags);

@@ -1923,20 +1909,19 @@ static inline int fnic_queue_dr_io_req(struct fnic *fnic,
struct fnic_io_req *io_req)
{
struct vnic_wq_copy *wq = &fnic->hw_copy_wq[0];
- struct Scsi_Host *host = fnic->lport->host;
struct misc_stats *misc_stats = &fnic->fnic_stats.misc_stats;
struct scsi_lun fc_lun;
int ret = 0;
unsigned long intr_flags;

- spin_lock_irqsave(host->host_lock, intr_flags);
+ spin_lock_irqsave(&fnic->fnic_lock, intr_flags);
if (unlikely(fnic_chk_state_flags_locked(fnic,
FNIC_FLAGS_IO_BLOCKED))) {
- spin_unlock_irqrestore(host->host_lock, intr_flags);
+ spin_unlock_irqrestore(&fnic->fnic_lock, intr_flags);
return FAILED;
} else
atomic_inc(&fnic->in_flight);
- spin_unlock_irqrestore(host->host_lock, intr_flags);
+ spin_unlock_irqrestore(&fnic->fnic_lock, intr_flags);

spin_lock_irqsave(&fnic->wq_copy_lock[0], intr_flags);

--
2.31.1