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block: Use accessor functions for queue limits

Browse source 
Convert all external users of queue limits to using wrapper functions
instead of poking the request queue variables directly.

Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Martin K. Petersen 2009-05-22 17:17:50 -04:00 • committed by Jens Axboe
commit ae03bf639a
25 changed files with 147 additions and 97 deletions
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15
block/blk-settings.c
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@ -219,6 +219,15 @@ void blk_queue_max_sectors(struct request_queue *q, unsigned int max_sectors)
}
EXPORT_SYMBOL(blk_queue_max_sectors);
void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_sectors)
{
if (BLK_DEF_MAX_SECTORS > max_sectors)
q->max_hw_sectors = BLK_DEF_MAX_SECTORS;
else
q->max_hw_sectors = max_sectors;
}
EXPORT_SYMBOL(blk_queue_max_hw_sectors);
/**
* blk_queue_max_phys_segments - set max phys segments for a request for this queue
* @q: the request queue for the device
@ -395,11 +404,11 @@ int blk_queue_dma_drain(struct request_queue *q,
dma_drain_needed_fn *dma_drain_needed,
void *buf, unsigned int size)
{
if (q->max_hw_segments < 2 || q->max_phys_segments < 2)
if (queue_max_hw_segments(q) < 2 || queue_max_phys_segments(q) < 2)
return -EINVAL;
/* make room for appending the drain */
--q->max_hw_segments;
--q->max_phys_segments;
blk_queue_max_hw_segments(q, queue_max_hw_segments(q) - 1);
blk_queue_max_phys_segments(q, queue_max_phys_segments(q) - 1);
q->dma_drain_needed = dma_drain_needed;
q->dma_drain_buffer = buf;
q->dma_drain_size = size;