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Message-ID: <1373665694-7580-4-git-send-email-santosh.shilimkar@ti.com> Date: Fri, 12 Jul 2013 17:48:12 -0400 From: Santosh Shilimkar <santosh.shilimkar@...com> To: <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org> CC: Santosh Shilimkar <santosh.shilimkar@...com>, Russell King <linux@....linux.org.uk>, <linux-scsi@...r.kernel.org> Subject: [RFC/RFT PATCH 3/5] 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: Russell King <linux@....linux.org.uk> Cc: linux-scsi@...r.kernel.org Signed-off-by: Santosh Shilimkar <santosh.shilimkar@...com> --- drivers/scsi/scsi_lib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 86d5220..e8275fa 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1668,7 +1668,7 @@ 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; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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