[PATCH] ata: libata: Introduce ata_port_eh_scheduled()

[Damien Le Moal <dlemoal@kernel.org>]

Introduce the inline helper function ata_port_eh_scheduled() to test if
EH is pending (ATA_PFLAG_EH_PENDING port flag is set) or running
(ATA_PFLAG_EH_IN_PROGRESS port flag is set) for a port. Use this helper
in ata_port_wait_eh() and __ata_scsi_queuecmd() to replace the hardcoded
port flag tests.

No functional changes.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
---
 drivers/ata/libata-eh.c   | 2 +-
 drivers/ata/libata-scsi.c | 5 +++--
 drivers/ata/libata.h      | 5 +++++
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 1f8a6b930f5d..42aafb1ddb5a 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -823,7 +823,7 @@ void ata_port_wait_eh(struct ata_port *ap)
  retry:
 	spin_lock_irqsave(ap->lock, flags);
 
-	while (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS)) {
+	while (ata_port_eh_scheduled(ap)) {
 		prepare_to_wait(&ap->eh_wait_q, &wait, TASK_UNINTERRUPTIBLE);
 		spin_unlock_irqrestore(ap->lock, flags);
 		schedule();
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index b502b123008a..27b15176db56 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -4316,9 +4316,10 @@ int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev)
 	 * scsi_queue_rq() will defer commands if scsi_host_in_recovery().
 	 * However, this check is done without holding the ap->lock (a libata
 	 * specific lock), so we can have received an error irq since then,
-	 * therefore we must check if EH is pending, while holding ap->lock.
+	 * therefore we must check if EH is pending or running, while holding
+	 * ap->lock.
 	 */
-	if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS))
+	if (ata_port_eh_scheduled(ap))
 		return SCSI_MLQUEUE_DEVICE_BUSY;
 
 	if (unlikely(!scmd->cmd_len))
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 135e1e5ee44e..ca44fb792aeb 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -51,6 +51,11 @@ static inline bool ata_dev_is_zac(struct ata_device *dev)
 		ata_id_zoned_cap(dev->id) == 0x01;
 }
 
+static inline bool ata_port_eh_scheduled(struct ata_port *ap)
+{
+	return ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS);
+}
+
 #ifdef CONFIG_ATA_FORCE
 extern void ata_force_cbl(struct ata_port *ap);
 #else
-- 
2.50.0