From: Santosh Shilimkar santosh.shilimkar@ti.com
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.
Signed-off-by: Santosh Shilimkar santosh.shilimkar@ti.com Signed-off-by: Russell King rmk+kernel@arm.linux.org.uk --- 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 d1549b7..7bd7f0d 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; }