[PATCH 10/16] drivers/net: stmmac: don't treat NULL clk as an error

[PATCH 10/16] drivers/net: stmmac: don't treat NULL clk as an error

[Jamie Iles]

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: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
---
 drivers/net/stmmac/stmmac_timer.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/net/stmmac/stmmac_timer.c b/drivers/net/stmmac/stmmac_timer.c
index 2a0e1ab..ebb1b37 100644
--- a/drivers/net/stmmac/stmmac_timer.c
+++ b/drivers/net/stmmac/stmmac_timer.c
@@ -91,6 +91,7 @@ int stmmac_close_ext_timer(void)
 
 #elif defined(CONFIG_STMMAC_TMU_TIMER)
 #include <linux/clk.h>
+#include <linux/err.h>
 #define TMU_CHANNEL "tmu2_clk"
 static struct clk *timer_clock;
 
@@ -109,7 +110,7 @@ int stmmac_open_ext_timer(struct net_device *dev, struct stmmac_timer *tm)
 {
 	timer_clock = clk_get(NULL, TMU_CHANNEL);
 
-	if (timer_clock == NULL)
+	if (IS_ERR(timer_clock))
 		return -1;
 
 	if (tmu2_register_user(stmmac_timer_handler, (void *)dev) < 0) {
-- 
1.7.3.4

Re: [PATCH 10/16] drivers/net: stmmac: don't treat NULL clk as an error

[Peppe CAVALLARO]

Hello

On 1/11/2011 1:43 PM, 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.
>
Thanks for the patch that actually useful.
I'm going to rework this part of the driver.
At any rate, all my new changes can be done on top of this patch.

Regards,
Peppe
>
>
> Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
> Cc: netdev@vger.kernel.org
> Signed-off-by: Jamie Iles <jamie@jamieiles.com>
> ---
>  drivers/net/stmmac/stmmac_timer.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/stmmac/stmmac_timer.c
> b/drivers/net/stmmac/stmmac_timer.c
> index 2a0e1ab..ebb1b37 100644
> --- a/drivers/net/stmmac/stmmac_timer.c
> +++ b/drivers/net/stmmac/stmmac_timer.c
> @@ -91,6 +91,7 @@ int stmmac_close_ext_timer(void)
>
>  #elif defined(CONFIG_STMMAC_TMU_TIMER)
>  #include <linux/clk.h>
> +#include <linux/err.h>
>  #define TMU_CHANNEL "tmu2_clk"
>  static struct clk *timer_clock;
>
> @@ -109,7 +110,7 @@ int stmmac_open_ext_timer(struct net_device *dev,
> struct stmmac_timer *tm)
>  {
>         timer_clock = clk_get(NULL, TMU_CHANNEL);
>
> -       if (timer_clock == NULL)
> +       if (IS_ERR(timer_clock))
>                 return -1;
>
>         if (tmu2_register_user(stmmac_timer_handler, (void *)dev) < 0) {
> --
> 1.7.3.4
>

[PATCH 11/16] drivers/net: sh_irda: don't treat NULL clk as an error

[Jamie Iles]

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: Samuel Ortiz <samuel@sortiz.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
---
 drivers/net/irda/sh_sir.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/irda/sh_sir.c b/drivers/net/irda/sh_sir.c
index 52a7c86..56ba91a 100644
--- a/drivers/net/irda/sh_sir.c
+++ b/drivers/net/irda/sh_sir.c
@@ -12,6 +12,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -278,9 +279,9 @@ static int sh_sir_set_baudrate(struct sh_sir_self *self, u32 baudrate)
 	}
 
 	clk = clk_get(NULL, "irda_clk");
-	if (!clk) {
+	if (IS_ERR(clk)) {
 		dev_err(dev, "can not get irda_clk\n");
-		return -EIO;
+		return PTR_ERR(clk);
 	}
 
 	clk_set_rate(clk, sh_sir_find_sclk(clk));
-- 
1.7.3.4

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

[Jamie Iles]

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(-)

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;
 			}
-- 
1.7.3.4

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

[Wolfram Sang]

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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>

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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