Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757865Ab3GLVtW (ORCPT ); Fri, 12 Jul 2013 17:49:22 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:49637 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757641Ab3GLVtT (ORCPT ); Fri, 12 Jul 2013 17:49:19 -0400 From: Santosh Shilimkar To: , CC: Santosh Shilimkar , Russell King , Subject: [RFC/RFT PATCH 3/5] scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations Date: Fri, 12 Jul 2013 17:48:12 -0400 Message-ID: <1373665694-7580-4-git-send-email-santosh.shilimkar@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1373665694-7580-1-git-send-email-santosh.shilimkar@ti.com> References: <1373665694-7580-1-git-send-email-santosh.shilimkar@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1272 Lines: 36 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 Cc: linux-scsi@vger.kernel.org Signed-off-by: Santosh Shilimkar --- 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/