aboutsummaryrefslogtreecommitdiff
path: root/block/blk-settings.c
diff options
context:
space:
mode:
authorMartin K. Petersen <martin.petersen@oracle.com>2009-05-22 17:17:50 -0400
committerJens Axboe <jens.axboe@oracle.com>2009-05-22 23:22:54 +0200
commitae03bf639a5027d27270123f5f6e3ee6a412781d (patch)
treed705f41a188ad656b1f47f7952626a9f992e3b8f /block/blk-settings.c
parente1defc4ff0cf57aca6c5e3ff99fa503f5943c1f1 (diff)
downloadlinux-2.6.34-ux500-ae03bf639a5027d27270123f5f6e3ee6a412781d.tar.gz
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.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index 15c3164537b..0b32f984eed 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;