[PATCH v6 2/7] ata: libata: Introduce ata_ncq_supported()

Damien Le Moal
2022-11-08T05:55:54Z

Introduce the inline helper function ata_ncq_supported() to test if a
device supports NCQ commands. The function ata_ncq_enabled() is also
rewritten using this new helper function.

Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
include/linux/libata.h | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/include/linux/libata.h b/include/linux/libata.h
index af4953b95f76..58651f565b36 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1690,21 +1690,35 @@ extern struct ata_device *ata_dev_next(struct ata_device *dev,
(dev) = ata_dev_next((dev), (link), ATA_DITER_##mode))

/**
- * ata_ncq_enabled - Test whether NCQ is enabled
- * @dev: ATA device to test for
+ * ata_ncq_supported - Test whether NCQ is supported
+ * @dev: ATA device to test
*
* LOCKING:
* spin_lock_irqsave(host lock)
*
* RETURNS:
- * 1 if NCQ is enabled for @dev, 0 otherwise.
+ * true if @dev supports NCQ, false otherwise.
*/
-static inline int ata_ncq_enabled(struct ata_device *dev)
+static inline bool ata_ncq_supported(struct ata_device *dev)
{
if (!IS_ENABLED(CONFIG_SATA_HOST))
return 0;
- return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ_OFF |
- ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
+ return (dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ;
+}
+
+/**
+ * ata_ncq_enabled - Test whether NCQ is enabled
+ * @dev: ATA device to test
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ *
+ * RETURNS:
+ * true if NCQ is enabled for @dev, false otherwise.
+ */
+static inline bool ata_ncq_enabled(struct ata_device *dev)
+{
+ return ata_ncq_supported(dev) && !(dev->flags & ATA_DFLAG_NCQ_OFF);
}

static inline bool ata_fpdma_dsm_supported(struct ata_device *dev)
--
2.38.1