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scsi: block: Add a queue_max_bytes() helper

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Return the max_sectors value in bytes.  Lifted from scsi_ioctl.c.

Link: https://lore.kernel.org/r/20210724072033.1284840-13-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig
2021-07-24 09:20:21 +02:00
committed by Martin K. Petersen
parent 2e27f576ab
commit 547e2f7093
2 changed files with 7 additions and 11 deletions
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5
include/linux/blkdev.h
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@@ -1373,6 +1373,11 @@ static inline unsigned int queue_max_sectors(const struct request_queue *q)
return q->limits.max_sectors;
}
static inline unsigned int queue_max_bytes(struct request_queue *q)
{
return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9;
}
static inline unsigned int queue_max_hw_sectors(const struct request_queue *q)
{
return q->limits.max_hw_sectors;