* [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-09-01 12:35 ` Jackie Liu
0 siblings, 0 replies; 14+ messages in thread
From: Jackie Liu @ 2021-09-01 12:35 UTC (permalink / raw)
To: krzysztof.kozlowski
Cc: linux-samsung-soc, linux-arm-kernel, liu.yun, liuyun01
From: Jackie Liu <liuyun01@kylinos.cn>
The s3c24xx_init_intc() returns an error pointer upon failure, not NULL.
let's add an error pointer check in s3c24xx_handle_irq.
s3c_intc[0] is not NULL or ERR, we can simplify the code.
Fixes: 1f629b7a3ced ("ARM: S3C24XX: transform irq handling into a declarative form")
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
---
arch/arm/mach-s3c/irq-s3c24xx.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-s3c/irq-s3c24xx.c b/arch/arm/mach-s3c/irq-s3c24xx.c
index 0c631c14a817..df471d322493 100644
--- a/arch/arm/mach-s3c/irq-s3c24xx.c
+++ b/arch/arm/mach-s3c/irq-s3c24xx.c
@@ -362,11 +362,24 @@ static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc,
static asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs)
{
do {
- if (likely(s3c_intc[0]))
- if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
- continue;
+ /* For platform based machines, neither ERR nor NULL can happen here.
+ * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
+ *
+ * s3c_intc[0] = s3c24xx_init_intc()
+ *
+ * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
+ *
+ * For DT machine, s3c_init_intc_of() could set the IRQ handler without
+ * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
+ * such code path, so again the s3c_intc[0] will have a valid pointer if
+ * set_handle_irq() is called.
+ *
+ * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
+ */
+ if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
+ continue;
- if (s3c_intc[2])
+ if (!IS_ERR_OR_NULL(s3c_intc[2]))
if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
continue;
--
2.25.1
^ permalink raw reply related [flat|nested] 14+ messages in thread
* [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-09-01 12:35 ` Jackie Liu
0 siblings, 0 replies; 14+ messages in thread
From: Jackie Liu @ 2021-09-01 12:35 UTC (permalink / raw)
To: krzysztof.kozlowski
Cc: linux-samsung-soc, linux-arm-kernel, liu.yun, liuyun01
From: Jackie Liu <liuyun01@kylinos.cn>
The s3c24xx_init_intc() returns an error pointer upon failure, not NULL.
let's add an error pointer check in s3c24xx_handle_irq.
s3c_intc[0] is not NULL or ERR, we can simplify the code.
Fixes: 1f629b7a3ced ("ARM: S3C24XX: transform irq handling into a declarative form")
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
---
arch/arm/mach-s3c/irq-s3c24xx.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/arch/arm/mach-s3c/irq-s3c24xx.c b/arch/arm/mach-s3c/irq-s3c24xx.c
index 0c631c14a817..df471d322493 100644
--- a/arch/arm/mach-s3c/irq-s3c24xx.c
+++ b/arch/arm/mach-s3c/irq-s3c24xx.c
@@ -362,11 +362,24 @@ static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc,
static asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs)
{
do {
- if (likely(s3c_intc[0]))
- if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
- continue;
+ /* For platform based machines, neither ERR nor NULL can happen here.
+ * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
+ *
+ * s3c_intc[0] = s3c24xx_init_intc()
+ *
+ * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
+ *
+ * For DT machine, s3c_init_intc_of() could set the IRQ handler without
+ * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
+ * such code path, so again the s3c_intc[0] will have a valid pointer if
+ * set_handle_irq() is called.
+ *
+ * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
+ */
+ if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
+ continue;
- if (s3c_intc[2])
+ if (!IS_ERR_OR_NULL(s3c_intc[2]))
if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
continue;
--
2.25.1
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
2021-09-01 12:35 ` Jackie Liu
@ 2021-09-06 10:23 ` Jackie Liu
-1 siblings, 0 replies; 14+ messages in thread
From: Jackie Liu @ 2021-09-06 10:23 UTC (permalink / raw)
To: krzysztof.kozlowski; +Cc: linux-samsung-soc, linux-arm-kernel, liuyun01
Hi, krzysztof. Any suggestion?
--
BR, Jackie Liu
在 2021/9/1 下午8:35, Jackie Liu 写道:
> From: Jackie Liu <liuyun01@kylinos.cn>
>
> The s3c24xx_init_intc() returns an error pointer upon failure, not NULL.
> let's add an error pointer check in s3c24xx_handle_irq.
>
> s3c_intc[0] is not NULL or ERR, we can simplify the code.
>
> Fixes: 1f629b7a3ced ("ARM: S3C24XX: transform irq handling into a declarative form")
> Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
> ---
> arch/arm/mach-s3c/irq-s3c24xx.c | 21 +++++++++++++++++----
> 1 file changed, 17 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/mach-s3c/irq-s3c24xx.c b/arch/arm/mach-s3c/irq-s3c24xx.c
> index 0c631c14a817..df471d322493 100644
> --- a/arch/arm/mach-s3c/irq-s3c24xx.c
> +++ b/arch/arm/mach-s3c/irq-s3c24xx.c
> @@ -362,11 +362,24 @@ static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc,
> static asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs)
> {
> do {
> - if (likely(s3c_intc[0]))
> - if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
> - continue;
> + /* For platform based machines, neither ERR nor NULL can happen here.
> + * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
> + *
> + * s3c_intc[0] = s3c24xx_init_intc()
> + *
> + * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
> + *
> + * For DT machine, s3c_init_intc_of() could set the IRQ handler without
> + * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
> + * such code path, so again the s3c_intc[0] will have a valid pointer if
> + * set_handle_irq() is called.
> + *
> + * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
> + */
> + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
> + continue;
>
> - if (s3c_intc[2])
> + if (!IS_ERR_OR_NULL(s3c_intc[2]))
> if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
> continue;
>
>
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-09-06 10:23 ` Jackie Liu
0 siblings, 0 replies; 14+ messages in thread
From: Jackie Liu @ 2021-09-06 10:23 UTC (permalink / raw)
To: krzysztof.kozlowski; +Cc: linux-samsung-soc, linux-arm-kernel, liuyun01
Hi, krzysztof. Any suggestion?
--
BR, Jackie Liu
在 2021/9/1 下午8:35, Jackie Liu 写道:
> From: Jackie Liu <liuyun01@kylinos.cn>
>
> The s3c24xx_init_intc() returns an error pointer upon failure, not NULL.
> let's add an error pointer check in s3c24xx_handle_irq.
>
> s3c_intc[0] is not NULL or ERR, we can simplify the code.
>
> Fixes: 1f629b7a3ced ("ARM: S3C24XX: transform irq handling into a declarative form")
> Signed-off-by: Jackie Liu <liuyun01@kylinos.cn>
> ---
> arch/arm/mach-s3c/irq-s3c24xx.c | 21 +++++++++++++++++----
> 1 file changed, 17 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/mach-s3c/irq-s3c24xx.c b/arch/arm/mach-s3c/irq-s3c24xx.c
> index 0c631c14a817..df471d322493 100644
> --- a/arch/arm/mach-s3c/irq-s3c24xx.c
> +++ b/arch/arm/mach-s3c/irq-s3c24xx.c
> @@ -362,11 +362,24 @@ static inline int s3c24xx_handle_intc(struct s3c_irq_intc *intc,
> static asmlinkage void __exception_irq_entry s3c24xx_handle_irq(struct pt_regs *regs)
> {
> do {
> - if (likely(s3c_intc[0]))
> - if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
> - continue;
> + /* For platform based machines, neither ERR nor NULL can happen here.
> + * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
> + *
> + * s3c_intc[0] = s3c24xx_init_intc()
> + *
> + * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
> + *
> + * For DT machine, s3c_init_intc_of() could set the IRQ handler without
> + * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
> + * such code path, so again the s3c_intc[0] will have a valid pointer if
> + * set_handle_irq() is called.
> + *
> + * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
> + */
> + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
> + continue;
>
> - if (s3c_intc[2])
> + if (!IS_ERR_OR_NULL(s3c_intc[2]))
> if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
> continue;
>
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
2021-09-06 10:23 ` Jackie Liu
@ 2021-09-06 10:52 ` Krzysztof Kozlowski
-1 siblings, 0 replies; 14+ messages in thread
From: Krzysztof Kozlowski @ 2021-09-06 10:52 UTC (permalink / raw)
To: Jackie Liu; +Cc: linux-samsung-soc, linux-arm-kernel, liuyun01
On 06/09/2021 12:23, Jackie Liu wrote:
> Hi, krzysztof. Any suggestion?
>
No, looks good, but it's a merge window time so this will wait.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-09-06 10:52 ` Krzysztof Kozlowski
0 siblings, 0 replies; 14+ messages in thread
From: Krzysztof Kozlowski @ 2021-09-06 10:52 UTC (permalink / raw)
To: Jackie Liu; +Cc: linux-samsung-soc, linux-arm-kernel, liuyun01
On 06/09/2021 12:23, Jackie Liu wrote:
> Hi, krzysztof. Any suggestion?
>
No, looks good, but it's a merge window time so this will wait.
Best regards,
Krzysztof
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
2021-09-01 12:35 ` Jackie Liu
@ 2021-09-15 7:50 ` Krzysztof Kozlowski
-1 siblings, 0 replies; 14+ messages in thread
From: Krzysztof Kozlowski @ 2021-09-15 7:50 UTC (permalink / raw)
To: Jackie Liu
Cc: Krzysztof Kozlowski, linux-samsung-soc, linux-arm-kernel, liuyun01
On Wed, 1 Sep 2021 20:35:57 +0800, Jackie Liu wrote:
> From: Jackie Liu <liuyun01@kylinos.cn>
>
> The s3c24xx_init_intc() returns an error pointer upon failure, not NULL.
> let's add an error pointer check in s3c24xx_handle_irq.
>
> s3c_intc[0] is not NULL or ERR, we can simplify the code.
>
> [...]
Applied, thanks!
[1/1] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
commit: 2aa717473ce96c93ae43a5dc8c23cedc8ce7dd9f
Best regards,
--
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-09-15 7:50 ` Krzysztof Kozlowski
0 siblings, 0 replies; 14+ messages in thread
From: Krzysztof Kozlowski @ 2021-09-15 7:50 UTC (permalink / raw)
To: Jackie Liu
Cc: Krzysztof Kozlowski, linux-samsung-soc, linux-arm-kernel, liuyun01
On Wed, 1 Sep 2021 20:35:57 +0800, Jackie Liu wrote:
> From: Jackie Liu <liuyun01@kylinos.cn>
>
> The s3c24xx_init_intc() returns an error pointer upon failure, not NULL.
> let's add an error pointer check in s3c24xx_handle_irq.
>
> s3c_intc[0] is not NULL or ERR, we can simplify the code.
>
> [...]
Applied, thanks!
[1/1] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
commit: 2aa717473ce96c93ae43a5dc8c23cedc8ce7dd9f
Best regards,
--
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
2021-09-01 12:35 ` Jackie Liu
@ 2021-10-26 15:10 ` Arnd Bergmann
-1 siblings, 0 replies; 14+ messages in thread
From: Arnd Bergmann @ 2021-10-26 15:10 UTC (permalink / raw)
To: Jackie Liu
Cc: Krzysztof Kozlowski,
moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES, Linux ARM,
Jackie Liu
On Wed, Sep 1, 2021 at 2:35 PM Jackie Liu <liu.yun@linux.dev> wrote:
> + /* For platform based machines, neither ERR nor NULL can happen here.
> + * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
> + *
> + * s3c_intc[0] = s3c24xx_init_intc()
> + *
> + * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
> + *
> + * For DT machine, s3c_init_intc_of() could set the IRQ handler without
> + * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
> + * such code path, so again the s3c_intc[0] will have a valid pointer if
> + * set_handle_irq() is called.
> + *
> + * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
> + */
> + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
> + continue;
>
> - if (s3c_intc[2])
> + if (!IS_ERR_OR_NULL(s3c_intc[2]))
> if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
> continue;
I just saw this in the pull request. I'm taking the pull request since
it's a bugfix and
the resulting code is technically correct, but I'd point out that this
is particularly
ugly. Any use of IS_ERR_OR_NULL() essentially means we have a misdefined
interface, and it's clear that this is one of them.
Nothing actually uses the return code of s3c24xx_init_intc(), so returning
NULL on error there and changing all the checks to that would be a much
more straightforward solution.
Any chance you could send a follow-up to do that?
Arnd
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-10-26 15:10 ` Arnd Bergmann
0 siblings, 0 replies; 14+ messages in thread
From: Arnd Bergmann @ 2021-10-26 15:10 UTC (permalink / raw)
To: Jackie Liu
Cc: Krzysztof Kozlowski,
moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES, Linux ARM,
Jackie Liu
On Wed, Sep 1, 2021 at 2:35 PM Jackie Liu <liu.yun@linux.dev> wrote:
> + /* For platform based machines, neither ERR nor NULL can happen here.
> + * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
> + *
> + * s3c_intc[0] = s3c24xx_init_intc()
> + *
> + * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
> + *
> + * For DT machine, s3c_init_intc_of() could set the IRQ handler without
> + * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
> + * such code path, so again the s3c_intc[0] will have a valid pointer if
> + * set_handle_irq() is called.
> + *
> + * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
> + */
> + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
> + continue;
>
> - if (s3c_intc[2])
> + if (!IS_ERR_OR_NULL(s3c_intc[2]))
> if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
> continue;
I just saw this in the pull request. I'm taking the pull request since
it's a bugfix and
the resulting code is technically correct, but I'd point out that this
is particularly
ugly. Any use of IS_ERR_OR_NULL() essentially means we have a misdefined
interface, and it's clear that this is one of them.
Nothing actually uses the return code of s3c24xx_init_intc(), so returning
NULL on error there and changing all the checks to that would be a much
more straightforward solution.
Any chance you could send a follow-up to do that?
Arnd
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
2021-10-26 15:10 ` Arnd Bergmann
@ 2021-10-26 15:22 ` Krzysztof Kozlowski
-1 siblings, 0 replies; 14+ messages in thread
From: Krzysztof Kozlowski @ 2021-10-26 15:22 UTC (permalink / raw)
To: Arnd Bergmann, Jackie Liu
Cc: moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES, Linux ARM,
Jackie Liu
On 26/10/2021 17:10, Arnd Bergmann wrote:
> On Wed, Sep 1, 2021 at 2:35 PM Jackie Liu <liu.yun@linux.dev> wrote:
>
>> + /* For platform based machines, neither ERR nor NULL can happen here.
>> + * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
>> + *
>> + * s3c_intc[0] = s3c24xx_init_intc()
>> + *
>> + * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
>> + *
>> + * For DT machine, s3c_init_intc_of() could set the IRQ handler without
>> + * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
>> + * such code path, so again the s3c_intc[0] will have a valid pointer if
>> + * set_handle_irq() is called.
>> + *
>> + * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
>> + */
>> + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
>> + continue;
>>
>> - if (s3c_intc[2])
>> + if (!IS_ERR_OR_NULL(s3c_intc[2]))
>> if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
>> continue;
>
> I just saw this in the pull request. I'm taking the pull request since
> it's a bugfix and
> the resulting code is technically correct, but I'd point out that this
> is particularly
> ugly. Any use of IS_ERR_OR_NULL() essentially means we have a misdefined
> interface, and it's clear that this is one of them.
Yes, that's the case.
>
> Nothing actually uses the return code of s3c24xx_init_intc(), so returning
> NULL on error there and changing all the checks to that would be a much
> more straightforward solution.
>
> Any chance you could send a follow-up to do that?
I can work on this but you know this is a legacy platform and none of us
can test it?
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-10-26 15:22 ` Krzysztof Kozlowski
0 siblings, 0 replies; 14+ messages in thread
From: Krzysztof Kozlowski @ 2021-10-26 15:22 UTC (permalink / raw)
To: Arnd Bergmann, Jackie Liu
Cc: moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES, Linux ARM,
Jackie Liu
On 26/10/2021 17:10, Arnd Bergmann wrote:
> On Wed, Sep 1, 2021 at 2:35 PM Jackie Liu <liu.yun@linux.dev> wrote:
>
>> + /* For platform based machines, neither ERR nor NULL can happen here.
>> + * The s3c24xx_handle_irq() will be set as IRQ handler iff this succeeds:
>> + *
>> + * s3c_intc[0] = s3c24xx_init_intc()
>> + *
>> + * If this fails, the next calls to s3c24xx_init_intc() won't be executed.
>> + *
>> + * For DT machine, s3c_init_intc_of() could set the IRQ handler without
>> + * setting s3c_intc[0] only if it was called with num_ctrl=0. There is no
>> + * such code path, so again the s3c_intc[0] will have a valid pointer if
>> + * set_handle_irq() is called.
>> + *
>> + * Therefore in s3c24xx_handle_irq(), the s3c_intc[0] is always something.
>> + */
>> + if (s3c24xx_handle_intc(s3c_intc[0], regs, 0))
>> + continue;
>>
>> - if (s3c_intc[2])
>> + if (!IS_ERR_OR_NULL(s3c_intc[2]))
>> if (s3c24xx_handle_intc(s3c_intc[2], regs, 64))
>> continue;
>
> I just saw this in the pull request. I'm taking the pull request since
> it's a bugfix and
> the resulting code is technically correct, but I'd point out that this
> is particularly
> ugly. Any use of IS_ERR_OR_NULL() essentially means we have a misdefined
> interface, and it's clear that this is one of them.
Yes, that's the case.
>
> Nothing actually uses the return code of s3c24xx_init_intc(), so returning
> NULL on error there and changing all the checks to that would be a much
> more straightforward solution.
>
> Any chance you could send a follow-up to do that?
I can work on this but you know this is a legacy platform and none of us
can test it?
Best regards,
Krzysztof
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
2021-10-26 15:22 ` Krzysztof Kozlowski
@ 2021-10-26 15:28 ` Arnd Bergmann
-1 siblings, 0 replies; 14+ messages in thread
From: Arnd Bergmann @ 2021-10-26 15:28 UTC (permalink / raw)
To: Krzysztof Kozlowski
Cc: Arnd Bergmann, Jackie Liu,
moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES, Linux ARM,
Jackie Liu
On Tue, Oct 26, 2021 at 5:22 PM Krzysztof Kozlowski
<krzysztof.kozlowski@canonical.com> wrote:
> On 26/10/2021 17:10, Arnd Bergmann wrote:
> > On Wed, Sep 1, 2021 at 2:35 PM Jackie Liu <liu.yun@linux.dev> wrote:
...
> > Nothing actually uses the return code of s3c24xx_init_intc(), so returning
> > NULL on error there and changing all the checks to that would be a much
> > more straightforward solution.
> >
> > Any chance you could send a follow-up to do that?
>
> I can work on this but you know this is a legacy platform and none of us
> can test it?
Sure. I was actually hoping for Jackie to send you that follow-up.
Arnd
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc()
@ 2021-10-26 15:28 ` Arnd Bergmann
0 siblings, 0 replies; 14+ messages in thread
From: Arnd Bergmann @ 2021-10-26 15:28 UTC (permalink / raw)
To: Krzysztof Kozlowski
Cc: Arnd Bergmann, Jackie Liu,
moderated list:ARM/SAMSUNG EXYNOS ARM ARCHITECTURES, Linux ARM,
Jackie Liu
On Tue, Oct 26, 2021 at 5:22 PM Krzysztof Kozlowski
<krzysztof.kozlowski@canonical.com> wrote:
> On 26/10/2021 17:10, Arnd Bergmann wrote:
> > On Wed, Sep 1, 2021 at 2:35 PM Jackie Liu <liu.yun@linux.dev> wrote:
...
> > Nothing actually uses the return code of s3c24xx_init_intc(), so returning
> > NULL on error there and changing all the checks to that would be a much
> > more straightforward solution.
> >
> > Any chance you could send a follow-up to do that?
>
> I can work on this but you know this is a legacy platform and none of us
> can test it?
Sure. I was actually hoping for Jackie to send you that follow-up.
Arnd
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2021-10-26 15:30 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-01 12:35 [PATCH v2] ARM: s3c: irq-s3c24xx: Fix return value check for s3c24xx_init_intc() Jackie Liu
2021-09-01 12:35 ` Jackie Liu
2021-09-06 10:23 ` Jackie Liu
2021-09-06 10:23 ` Jackie Liu
2021-09-06 10:52 ` Krzysztof Kozlowski
2021-09-06 10:52 ` Krzysztof Kozlowski
2021-09-15 7:50 ` Krzysztof Kozlowski
2021-09-15 7:50 ` Krzysztof Kozlowski
2021-10-26 15:10 ` Arnd Bergmann
2021-10-26 15:10 ` Arnd Bergmann
2021-10-26 15:22 ` Krzysztof Kozlowski
2021-10-26 15:22 ` Krzysztof Kozlowski
2021-10-26 15:28 ` Arnd Bergmann
2021-10-26 15:28 ` Arnd Bergmann
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