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ata: libata: Introduce ata_ncq_supported()

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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>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
This commit is contained in:
Damien Le Moal 2022-10-27 13:07:55 +09:00
parent b4a6bb3a67
commit fa5bde139e
1 changed files with 21 additions and 7 deletions
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28
include/linux/libata.h
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@ -1691,21 +1691,35 @@ 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 false;
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)