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SubjectRe: [PATCH v2 2/2] scsi: libsas: Use bool for queue_work() return code
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On 2022/02/25 19:57, John Garry wrote:
> Function queue_work() returns a bool, so use a bool to hold this value
> for the return code from callers, which should make the code a tiny bit
> more clear.
>
> Also take this opportunity to condense the code of the those callers, such
> as sas_queue_work(), as suggested by Damien.
>
> Signed-off-by: John Garry <john.garry@huawei.com>

Looks good to me.

Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

> ---
> drivers/scsi/libsas/sas_event.c | 30 +++++++++++-------------------
> drivers/scsi/libsas/sas_internal.h | 2 +-
> 2 files changed, 12 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/scsi/libsas/sas_event.c b/drivers/scsi/libsas/sas_event.c
> index 8ff58fd97837..f3a17191a4fe 100644
> --- a/drivers/scsi/libsas/sas_event.c
> +++ b/drivers/scsi/libsas/sas_event.c
> @@ -10,29 +10,26 @@
> #include <scsi/scsi_host.h>
> #include "sas_internal.h"
>
> -int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
> +bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw)
> {
> - /* it's added to the defer_q when draining so return succeed */
> - int rc = 1;
> -
> if (!test_bit(SAS_HA_REGISTERED, &ha->state))
> - return 0;
> + return false;
>
> if (test_bit(SAS_HA_DRAINING, &ha->state)) {
> /* add it to the defer list, if not already pending */
> if (list_empty(&sw->drain_node))
> list_add_tail(&sw->drain_node, &ha->defer_q);
> - } else
> - rc = queue_work(ha->event_q, &sw->work);
> + return true;
> + }
>
> - return rc;
> + return queue_work(ha->event_q, &sw->work);
> }
>
> -static int sas_queue_event(int event, struct sas_work *work,
> +static bool sas_queue_event(int event, struct sas_work *work,
> struct sas_ha_struct *ha)
> {
> unsigned long flags;
> - int rc;
> + bool rc;
>
> spin_lock_irqsave(&ha->lock, flags);
> rc = sas_queue_work(ha, work);
> @@ -44,13 +41,12 @@ static int sas_queue_event(int event, struct sas_work *work,
> void sas_queue_deferred_work(struct sas_ha_struct *ha)
> {
> struct sas_work *sw, *_sw;
> - int ret;
>
> spin_lock_irq(&ha->lock);
> list_for_each_entry_safe(sw, _sw, &ha->defer_q, drain_node) {
> list_del_init(&sw->drain_node);
> - ret = sas_queue_work(ha, sw);
> - if (ret != 1) {
> +
> + if (!sas_queue_work(ha, sw)) {
> pm_runtime_put(ha->dev);
> sas_free_event(to_asd_sas_event(&sw->work));
> }
> @@ -170,7 +166,6 @@ void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
> {
> struct sas_ha_struct *ha = phy->ha;
> struct asd_sas_event *ev;
> - int ret;
>
> BUG_ON(event >= PORT_NUM_EVENTS);
>
> @@ -186,8 +181,7 @@ void sas_notify_port_event(struct asd_sas_phy *phy, enum port_event event,
> if (sas_defer_event(phy, ev))
> return;
>
> - ret = sas_queue_event(event, &ev->work, ha);
> - if (ret != 1) {
> + if (!sas_queue_event(event, &ev->work, ha)) {
> pm_runtime_put(ha->dev);
> sas_free_event(ev);
> }
> @@ -199,7 +193,6 @@ void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
> {
> struct sas_ha_struct *ha = phy->ha;
> struct asd_sas_event *ev;
> - int ret;
>
> BUG_ON(event >= PHY_NUM_EVENTS);
>
> @@ -215,8 +208,7 @@ void sas_notify_phy_event(struct asd_sas_phy *phy, enum phy_event event,
> if (sas_defer_event(phy, ev))
> return;
>
> - ret = sas_queue_event(event, &ev->work, ha);
> - if (ret != 1) {
> + if (!sas_queue_event(event, &ev->work, ha)) {
> pm_runtime_put(ha->dev);
> sas_free_event(ev);
> }
> diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h
> index 24843db2cb65..13d0ffaada93 100644
> --- a/drivers/scsi/libsas/sas_internal.h
> +++ b/drivers/scsi/libsas/sas_internal.h
> @@ -67,7 +67,7 @@ void sas_porte_broadcast_rcvd(struct work_struct *work);
> void sas_porte_link_reset_err(struct work_struct *work);
> void sas_porte_timer_event(struct work_struct *work);
> void sas_porte_hard_reset(struct work_struct *work);
> -int sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
> +bool sas_queue_work(struct sas_ha_struct *ha, struct sas_work *sw);
>
> int sas_notify_lldd_dev_found(struct domain_device *);
> void sas_notify_lldd_dev_gone(struct domain_device *);


--
Damien Le Moal
Western Digital Research

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