diff options
| author | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2013-07-29 15:19:42 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-10-31 15:49:26 +0100 |
| commit | 7d35496dd98229cdf923238367fd3b3833fbde52 (patch) | |
| tree | c3007eb555503e12cbad14122ff7765c8863fcce /drivers/scsi/scsi_lib.c | |
| parent | ARM: 7795/1: mm: dma-mapping: Add dma_max_pfn(dev) helper function (diff) | |
| download | linux-7d35496dd98229cdf923238367fd3b3833fbde52.tar.xz linux-7d35496dd98229cdf923238367fd3b3833fbde52.zip | |
ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
DMA bounce limit is the maximum direct DMA'able memory beyond which
bounce buffers has to be used to perform dma operations. SCSI driver
relies on dma_mask but its calculation is based on max_*pfn which
don't have uniform meaning across architectures. So make use of
dma_max_pfn() which is expected to return the DMAable maximum pfn
value across architectures.
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to '')
| -rw-r--r-- | drivers/scsi/scsi_lib.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index d1549b74e2d1..7bd7f0d5f050 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1684,7 +1684,7 @@ u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost) host_dev = scsi_get_device(shost); if (host_dev && host_dev->dma_mask) - bounce_limit = *host_dev->dma_mask; + bounce_limit = dma_max_pfn(host_dev) << PAGE_SHIFT; return bounce_limit; } |