]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations
authorSantosh Shilimkar <santosh.shilimkar@ti.com>
Mon, 29 Jul 2013 13:19:42 +0000 (14:19 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Thu, 31 Oct 2013 14:49:26 +0000 (14:49 +0000)
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>
drivers/scsi/scsi_lib.c

index d1549b74e2d1b91eeb4f8ebf459ec4f13db73275..7bd7f0d5f050a2ece3f176b1f05ca2f8936270a3 100644 (file)
@@ -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;
 }