public inbox for u-boot@lists.denx.de
 help / color / mirror / Atom feed
* [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference
@ 2015-05-23  7:16 Axel Lin
  2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
                   ` (3 more replies)
  0 siblings, 4 replies; 8+ messages in thread
From: Axel Lin @ 2015-05-23  7:16 UTC (permalink / raw)
  To: u-boot

pwm_id_to_reg() can return NULL, so add NULL testing to prevent NULL pointer
dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
 drivers/pwm/pwm-imx.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 40bf027..47799fc 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -18,6 +18,9 @@ int pwm_init(int pwm_id, int div, int invert)
 {
 	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
 
+	if (!pwm)
+		return -1;
+
 	writel(0, &pwm->ir);
 	return 0;
 }
@@ -28,6 +31,9 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns)
 	unsigned long period_cycles, duty_cycles, prescale;
 	u32 cr;
 
+	if (!pwm)
+		return -1;
+
 	pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles,
 			  &prescale);
 
@@ -47,6 +53,9 @@ int pwm_enable(int pwm_id)
 {
 	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
 
+	if (!pwm)
+		return -1;
+
 	setbits_le32(&pwm->cr, PWMCR_EN);
 	return 0;
 }
@@ -55,5 +64,8 @@ void pwm_disable(int pwm_id)
 {
 	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
 
+	if (!pwm)
+		return;
+
 	clrbits_le32(&pwm->cr, PWMCR_EN);
 }
-- 
2.1.0

^ permalink raw reply related	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code
  2015-05-23  7:16 [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Axel Lin
@ 2015-05-23  7:17 ` Axel Lin
  2015-05-23 10:22   ` Stefano Babic
                     ` (2 more replies)
  2015-05-23 10:22 ` [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Stefano Babic
                   ` (2 subsequent siblings)
  3 siblings, 3 replies; 8+ messages in thread
From: Axel Lin @ 2015-05-23  7:17 UTC (permalink / raw)
  To: u-boot

The break after return is unreachable code, remove it.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
 drivers/pwm/pwm-imx-util.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/pwm/pwm-imx-util.c b/drivers/pwm/pwm-imx-util.c
index 79d86028..f92c370 100644
--- a/drivers/pwm/pwm-imx-util.c
+++ b/drivers/pwm/pwm-imx-util.c
@@ -21,16 +21,12 @@ struct pwm_regs *pwm_id_to_reg(int pwm_id)
 	switch (pwm_id) {
 	case 0:
 		return (struct pwm_regs *)PWM1_BASE_ADDR;
-		break;
 	case 1:
 		return (struct pwm_regs *)PWM2_BASE_ADDR;
-		break;
 	case 2:
 		return (struct pwm_regs *)PWM3_BASE_ADDR;
-		break;
 	case 3:
 		return (struct pwm_regs *)PWM4_BASE_ADDR;
-		break;
 	default:
 		printf("unknown pwm_id: %d\n", pwm_id);
 		break;
-- 
2.1.0

^ permalink raw reply related	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference
  2015-05-23  7:16 [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Axel Lin
  2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
@ 2015-05-23 10:22 ` Stefano Babic
  2015-05-26  4:27 ` Heiko Schocher
  2015-05-26 12:14 ` Stefano Babic
  3 siblings, 0 replies; 8+ messages in thread
From: Stefano Babic @ 2015-05-23 10:22 UTC (permalink / raw)
  To: u-boot

Hi Axel,

On 23/05/2015 09:16, Axel Lin wrote:
> pwm_id_to_reg() can return NULL, so add NULL testing to prevent NULL pointer
> dereference.
> 
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
>  drivers/pwm/pwm-imx.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
> index 40bf027..47799fc 100644
> --- a/drivers/pwm/pwm-imx.c
> +++ b/drivers/pwm/pwm-imx.c
> @@ -18,6 +18,9 @@ int pwm_init(int pwm_id, int div, int invert)
>  {
>  	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
>  
> +	if (!pwm)
> +		return -1;
> +
>  	writel(0, &pwm->ir);
>  	return 0;
>  }
> @@ -28,6 +31,9 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns)
>  	unsigned long period_cycles, duty_cycles, prescale;
>  	u32 cr;
>  
> +	if (!pwm)
> +		return -1;
> +
>  	pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles,
>  			  &prescale);
>  
> @@ -47,6 +53,9 @@ int pwm_enable(int pwm_id)
>  {
>  	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
>  
> +	if (!pwm)
> +		return -1;
> +
>  	setbits_le32(&pwm->cr, PWMCR_EN);
>  	return 0;
>  }
> @@ -55,5 +64,8 @@ void pwm_disable(int pwm_id)
>  {
>  	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
>  
> +	if (!pwm)
> +		return;
> +
>  	clrbits_le32(&pwm->cr, PWMCR_EN);
>  }
> 

Right !

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code
  2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
@ 2015-05-23 10:22   ` Stefano Babic
  2015-05-26  4:27   ` Heiko Schocher
  2015-05-26 12:14   ` Stefano Babic
  2 siblings, 0 replies; 8+ messages in thread
From: Stefano Babic @ 2015-05-23 10:22 UTC (permalink / raw)
  To: u-boot



On 23/05/2015 09:17, Axel Lin wrote:
> The break after return is unreachable code, remove it.
> 
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
>  drivers/pwm/pwm-imx-util.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-imx-util.c b/drivers/pwm/pwm-imx-util.c
> index 79d86028..f92c370 100644
> --- a/drivers/pwm/pwm-imx-util.c
> +++ b/drivers/pwm/pwm-imx-util.c
> @@ -21,16 +21,12 @@ struct pwm_regs *pwm_id_to_reg(int pwm_id)
>  	switch (pwm_id) {
>  	case 0:
>  		return (struct pwm_regs *)PWM1_BASE_ADDR;
> -		break;
>  	case 1:
>  		return (struct pwm_regs *)PWM2_BASE_ADDR;
> -		break;
>  	case 2:
>  		return (struct pwm_regs *)PWM3_BASE_ADDR;
> -		break;
>  	case 3:
>  		return (struct pwm_regs *)PWM4_BASE_ADDR;
> -		break;
>  	default:
>  		printf("unknown pwm_id: %d\n", pwm_id);
>  		break;
> 

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference
  2015-05-23  7:16 [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Axel Lin
  2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
  2015-05-23 10:22 ` [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Stefano Babic
@ 2015-05-26  4:27 ` Heiko Schocher
  2015-05-26 12:14 ` Stefano Babic
  3 siblings, 0 replies; 8+ messages in thread
From: Heiko Schocher @ 2015-05-26  4:27 UTC (permalink / raw)
  To: u-boot

Hello Axel,

Am 23.05.2015 09:16, schrieb Axel Lin:
> pwm_id_to_reg() can return NULL, so add NULL testing to prevent NULL pointer
> dereference.
>
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
>   drivers/pwm/pwm-imx.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)

Acked-by: Heiko Schocher <hs@denx.de>

bye,
Heiko
>
> diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
> index 40bf027..47799fc 100644
> --- a/drivers/pwm/pwm-imx.c
> +++ b/drivers/pwm/pwm-imx.c
> @@ -18,6 +18,9 @@ int pwm_init(int pwm_id, int div, int invert)
>   {
>   	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
>
> +	if (!pwm)
> +		return -1;
> +
>   	writel(0, &pwm->ir);
>   	return 0;
>   }
> @@ -28,6 +31,9 @@ int pwm_config(int pwm_id, int duty_ns, int period_ns)
>   	unsigned long period_cycles, duty_cycles, prescale;
>   	u32 cr;
>
> +	if (!pwm)
> +		return -1;
> +
>   	pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles,
>   			  &prescale);
>
> @@ -47,6 +53,9 @@ int pwm_enable(int pwm_id)
>   {
>   	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
>
> +	if (!pwm)
> +		return -1;
> +
>   	setbits_le32(&pwm->cr, PWMCR_EN);
>   	return 0;
>   }
> @@ -55,5 +64,8 @@ void pwm_disable(int pwm_id)
>   {
>   	struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
>
> +	if (!pwm)
> +		return;
> +
>   	clrbits_le32(&pwm->cr, PWMCR_EN);
>   }
>

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code
  2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
  2015-05-23 10:22   ` Stefano Babic
@ 2015-05-26  4:27   ` Heiko Schocher
  2015-05-26 12:14   ` Stefano Babic
  2 siblings, 0 replies; 8+ messages in thread
From: Heiko Schocher @ 2015-05-26  4:27 UTC (permalink / raw)
  To: u-boot

Hello Axel,

Am 23.05.2015 09:17, schrieb Axel Lin:
> The break after return is unreachable code, remove it.
>
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
>   drivers/pwm/pwm-imx-util.c | 4 ----
>   1 file changed, 4 deletions(-)

Acked-by: Heiko Schocher <hs@denx.de>

bye,
Heiko
>
> diff --git a/drivers/pwm/pwm-imx-util.c b/drivers/pwm/pwm-imx-util.c
> index 79d86028..f92c370 100644
> --- a/drivers/pwm/pwm-imx-util.c
> +++ b/drivers/pwm/pwm-imx-util.c
> @@ -21,16 +21,12 @@ struct pwm_regs *pwm_id_to_reg(int pwm_id)
>   	switch (pwm_id) {
>   	case 0:
>   		return (struct pwm_regs *)PWM1_BASE_ADDR;
> -		break;
>   	case 1:
>   		return (struct pwm_regs *)PWM2_BASE_ADDR;
> -		break;
>   	case 2:
>   		return (struct pwm_regs *)PWM3_BASE_ADDR;
> -		break;
>   	case 3:
>   		return (struct pwm_regs *)PWM4_BASE_ADDR;
> -		break;
>   	default:
>   		printf("unknown pwm_id: %d\n", pwm_id);
>   		break;
>

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference
  2015-05-23  7:16 [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Axel Lin
                   ` (2 preceding siblings ...)
  2015-05-26  4:27 ` Heiko Schocher
@ 2015-05-26 12:14 ` Stefano Babic
  3 siblings, 0 replies; 8+ messages in thread
From: Stefano Babic @ 2015-05-26 12:14 UTC (permalink / raw)
  To: u-boot

On 23/05/2015 09:16, Axel Lin wrote:
> pwm_id_to_reg() can return NULL, so add NULL testing to prevent NULL pointer
> dereference.
> 
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---

Applied to u-boot-imx, thanks!

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code
  2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
  2015-05-23 10:22   ` Stefano Babic
  2015-05-26  4:27   ` Heiko Schocher
@ 2015-05-26 12:14   ` Stefano Babic
  2 siblings, 0 replies; 8+ messages in thread
From: Stefano Babic @ 2015-05-26 12:14 UTC (permalink / raw)
  To: u-boot

On 23/05/2015 09:17, Axel Lin wrote:
> The break after return is unreachable code, remove it.
> 
> Signed-off-by: Axel Lin <axel.lin@ingics.com>
> ---
>  drivers/pwm/pwm-imx-util.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-imx-util.c b/drivers/pwm/pwm-imx-util.c
> index 79d86028..f92c370 100644
> --- a/drivers/pwm/pwm-imx-util.c
> +++ b/drivers/pwm/pwm-imx-util.c
> @@ -21,16 +21,12 @@ struct pwm_regs *pwm_id_to_reg(int pwm_id)
>  	switch (pwm_id) {
>  	case 0:
>  		return (struct pwm_regs *)PWM1_BASE_ADDR;
> -		break;
>  	case 1:
>  		return (struct pwm_regs *)PWM2_BASE_ADDR;
> -		break;
>  	case 2:
>  		return (struct pwm_regs *)PWM3_BASE_ADDR;
> -		break;
>  	case 3:
>  		return (struct pwm_regs *)PWM4_BASE_ADDR;
> -		break;
>  	default:
>  		printf("unknown pwm_id: %d\n", pwm_id);
>  		break;
> 
Applied to u-boot-imx, thanks!

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2015-05-26 12:14 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2015-05-23  7:16 [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Axel Lin
2015-05-23  7:17 ` [U-Boot] [PATCH 2/2] pwm: imx: Remove unreachable code Axel Lin
2015-05-23 10:22   ` Stefano Babic
2015-05-26  4:27   ` Heiko Schocher
2015-05-26 12:14   ` Stefano Babic
2015-05-23 10:22 ` [U-Boot] [PATCH 1/2] pwm: imx: Prevent NULL pointer dereference Stefano Babic
2015-05-26  4:27 ` Heiko Schocher
2015-05-26 12:14 ` Stefano Babic

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox