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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2009-05-22 17:17:50 -0400 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-22 23:22:54 +0200 |
| commit | ae03bf639a5027d27270123f5f6e3ee6a412781d (patch) | |
| tree | d705f41a188ad656b1f47f7952626a9f992e3b8f /block/blk-settings.c | |
| parent | e1defc4ff0cf57aca6c5e3ff99fa503f5943c1f1 (diff) | |
| download | lwn-ae03bf639a5027d27270123f5f6e3ee6a412781d.tar.gz lwn-ae03bf639a5027d27270123f5f6e3ee6a412781d.zip | |
block: Use accessor functions for queue limits
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 <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-settings.c')
| -rw-r--r-- | block/blk-settings.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 15c3164537b8..0b32f984eed2 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -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; |