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[14/16] can: mpc5xxx_can: don't treat NULL clk as an error

Message ID 1294749833-32019-15-git-send-email-jamie@jamieiles.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Jamie Iles Jan. 11, 2011, 12:43 p.m. UTC 
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: netdev@vger.kernel.org
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
---
 drivers/net/can/mscan/mpc5xxx_can.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

Comments

Wolfram Sang Jan. 11, 2011, 3:18 p.m. UTC | #1 
On Tue, Jan 11, 2011 at 12:43:51PM +0000, Jamie Iles wrote:
> 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: netdev@vger.kernel.org
> Signed-off-by: Jamie Iles <jamie@jamieiles.com>

Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
diff mbox

Patch

diff --git a/drivers/net/can/mscan/mpc5xxx_can.c b/drivers/net/can/mscan/mpc5xxx_can.c
index 312b9c8..15377c0 100644
--- a/drivers/net/can/mscan/mpc5xxx_can.c
+++ b/drivers/net/can/mscan/mpc5xxx_can.c
@@ -29,6 +29,7 @@ 
 #include <linux/of_platform.h>
 #include <sysdev/fsl_soc.h>
 #include <linux/clk.h>
+#include <linux/err.h>
 #include <linux/io.h>
 #include <asm/mpc52xx.h>
 
@@ -181,7 +182,7 @@  static u32 __devinit mpc512x_can_get_clock(struct platform_device *ofdev,
 
 		if (!clock_name || !strcmp(clock_name, "sys")) {
 			sys_clk = clk_get(&ofdev->dev, "sys_clk");
-			if (!sys_clk) {
+			if (IS_ERR(sys_clk)) {
 				dev_err(&ofdev->dev, "couldn't get sys_clk\n");
 				goto exit_unmap;
 			}
@@ -204,7 +205,7 @@  static u32 __devinit mpc512x_can_get_clock(struct platform_device *ofdev,
 
 		if (clocksrc < 0) {
 			ref_clk = clk_get(&ofdev->dev, "ref_clk");
-			if (!ref_clk) {
+			if (IS_ERR(ref_clk)) {
 				dev_err(&ofdev->dev, "couldn't get ref_clk\n");
 				goto exit_unmap;
 			}