netdev - [PATCH 35/51] DMA-API: parport: parport_pc.c: use dma_coerce_mask_and

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 19 Sep 2013 23:00:03 +0100
From:	Russell King <rmk+kernel@....linux.org.uk>
To:	alsa-devel@...a-project.org, b43-dev@...ts.infradead.org,
	devel@...verdev.osuosl.org, devicetree@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, e1000-devel@...ts.sourceforge.net,
	linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-fbdev@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-media@...r.kernel.org,
	linux-mmc@...r.kernel.org, linux-nvme@...ts.infradead.org,
	linux-omap@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-samsung-soc@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	Solarflare linux maintainers <linux-net-drivers@...arflare.com>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: [PATCH 35/51] DMA-API: parport: parport_pc.c: use
 dma_coerce_mask_and_coherent()

The code sequence:
	dev->coherent_dma_mask = DMA_BIT_MASK(24);
	dev->dma_mask = &dev->coherent_dma_mask;
bypasses the architectures check on the DMA mask.  It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.

Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
---
 drivers/parport/parport_pc.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 903e128..9637615 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -2004,6 +2004,7 @@ struct parport *parport_pc_probe_port(unsigned long int base,
 	struct resource	*ECR_res = NULL;
 	struct resource	*EPP_res = NULL;
 	struct platform_device *pdev = NULL;
+	int ret;
 
 	if (!dev) {
 		/* We need a physical device to attach to, but none was
@@ -2014,8 +2015,11 @@ struct parport *parport_pc_probe_port(unsigned long int base,
 			return NULL;
 		dev = &pdev->dev;
 
-		dev->coherent_dma_mask = DMA_BIT_MASK(24);
-		dev->dma_mask = &dev->coherent_dma_mask;
+		ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(24));
+		if (ret) {
+			dev_err(dev, "Unable to set coherent dma mask: disabling DMA\n");
+			dma = PARPORT_DMA_NONE;
+		}
 	}
 
 	ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
-- 
1.7.4.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html