From: Santosh Shilimkar Date: Mon, 29 Jul 2013 13:19:42 +0000 (+0100) Subject: ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7d35496dd98229cdf923238367fd3b3833fbde52;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git 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 Signed-off-by: Russell King --- 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; }