linux-kernel - [PATCH 15/16] spi: dw_spi: don't treat NULL clk as an error

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Message-Id: <1294749833-32019-16-git-send-email-jamie@jamieiles.com>
Date:	Tue, 11 Jan 2011 12:43:52 +0000
From:	Jamie Iles <jamie@...ieiles.com>
To:	linux-kernel@...r.kernel.org
Cc:	Jamie Iles <jamie@...ieiles.com>,
	spi-devel-general@...ts.sourceforge.net
Subject: [PATCH 15/16] spi: dw_spi: don't treat NULL clk as an error

clk_get() returns a struct clk cookie to the driver and some platforms
may return NULL if they only support a single clock.  clk_get() has only
failed if it returns a ERR_PTR() encoded pointer.

Cc: spi-devel-general@...ts.sourceforge.net
Signed-off-by: Jamie Iles <jamie@...ieiles.com>
---
 drivers/spi/dw_spi_mmio.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/dw_spi_mmio.c b/drivers/spi/dw_spi_mmio.c
index db35bd9..2fa012c 100644
--- a/drivers/spi/dw_spi_mmio.c
+++ b/drivers/spi/dw_spi_mmio.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -68,8 +69,8 @@ static int __devinit dw_spi_mmio_probe(struct platform_device *pdev)
 	}
 
 	dwsmmio->clk = clk_get(&pdev->dev, NULL);
-	if (!dwsmmio->clk) {
-		ret = -ENODEV;
+	if (IS_ERR(dwsmmio->clk)) {
+		ret = PTR_ERR(dwsmmio->clk);
 		goto err_irq;
 	}
 	clk_enable(dwsmmio->clk);
-- 
1.7.3.4

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