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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2009-06-03 09:33:18 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-06-03 09:33:18 +0200 |
| commit | a05c0205ba031c01bba33a21bf0a35920eb64833 (patch) | |
| tree | 517c7682fc415cdb122ee7fcfc75eff674cc7b78 /block/blk-settings.c | |
| parent | dbdc9dd342f0a7e32f40f0d4ade662bdfe057484 (diff) | |
| download | linux-next-a05c0205ba031c01bba33a21bf0a35920eb64833.tar.gz | |
block: Fix bounce limit setting in DM
blk_queue_bounce_limit() is more than a wrapper about the request queue
limits.bounce_pfn variable. Introduce blk_queue_bounce_pfn() which can
be called by stacking drivers that wish to set the bounce limit
explicitly.
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 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 8d3393492891..9acd0b7e802a 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -194,6 +194,23 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask) EXPORT_SYMBOL(blk_queue_bounce_limit); /** + * blk_queue_bounce_pfn - set the bounce buffer limit for queue + * @q: the request queue for the device + * @pfn: max address + * + * Description: + * This function is similar to blk_queue_bounce_limit except it + * neither changes allocation flags, nor does it set up the ISA DMA + * pool. This function should only be used by stacking drivers. + * Hardware drivers should use blk_queue_bounce_limit instead. + */ +void blk_queue_bounce_pfn(struct request_queue *q, u64 pfn) +{ + q->limits.bounce_pfn = pfn; +} +EXPORT_SYMBOL(blk_queue_bounce_pfn); + +/** * blk_queue_max_sectors - set max sectors for a request for this queue * @q: the request queue for the device * @max_sectors: max sectors in the usual 512b unit |