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* [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-02 22:42 ` Nathan Chancellor
  0 siblings, 0 replies; 9+ messages in thread
From: Nathan Chancellor @ 2020-03-02 22:42 UTC (permalink / raw)
  To: Harry Wentland, Leo Li, Alex Deucher, Christian König,
	David (ChunMing) Zhou
  Cc: amd-gfx, dri-devel, linux-kernel, clang-built-linux, Nathan Chancellor

Clang warns:

drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
address of 'pipe_ctx->plane_res' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
                         ~ ~~~~~~~~~~^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
address of 'pipe_ctx->stream_res' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
                                                  ~ ~~~~~~~~~~^~~~~~~~~~
2 warnings generated.

As long as pipe_ctx is not NULL, the address of members in this struct
cannot be NULL, which means these checks will always evaluate to false.

Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
Link: https://github.com/ClangBuiltLinux/linux/issues/915
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
index 2c932c29f1f9..a9e1c01e9d9b 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
@@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
 		}
 	}
 
-	if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
+	if (!pipe_ctx)
 		return false;
 
 	// First, set the psr version
-- 
2.25.1


^ permalink raw reply related	[flat|nested] 9+ messages in thread
* [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-02 22:42 ` Nathan Chancellor
  0 siblings, 0 replies; 9+ messages in thread
From: Nathan Chancellor @ 2020-03-02 22:42 UTC (permalink / raw)
  To: Harry Wentland, Leo Li, Alex Deucher, Christian König,
	David (ChunMing) Zhou
  Cc: clang-built-linux, Nathan Chancellor, dri-devel, amd-gfx, linux-kernel

Clang warns:

drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
address of 'pipe_ctx->plane_res' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
                         ~ ~~~~~~~~~~^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
address of 'pipe_ctx->stream_res' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
                                                  ~ ~~~~~~~~~~^~~~~~~~~~
2 warnings generated.

As long as pipe_ctx is not NULL, the address of members in this struct
cannot be NULL, which means these checks will always evaluate to false.

Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
Link: https://github.com/ClangBuiltLinux/linux/issues/915
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
index 2c932c29f1f9..a9e1c01e9d9b 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
@@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
 		}
 	}
 
-	if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
+	if (!pipe_ctx)
 		return false;
 
 	// First, set the psr version
-- 
2.25.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply related	[flat|nested] 9+ messages in thread
* [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-02 22:42 ` Nathan Chancellor
  0 siblings, 0 replies; 9+ messages in thread
From: Nathan Chancellor @ 2020-03-02 22:42 UTC (permalink / raw)
  To: Harry Wentland, Leo Li, Alex Deucher, Christian König,
	David (ChunMing) Zhou
  Cc: clang-built-linux, Nathan Chancellor, dri-devel, amd-gfx, linux-kernel

Clang warns:

drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
address of 'pipe_ctx->plane_res' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
                         ~ ~~~~~~~~~~^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
address of 'pipe_ctx->stream_res' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
                                                  ~ ~~~~~~~~~~^~~~~~~~~~
2 warnings generated.

As long as pipe_ctx is not NULL, the address of members in this struct
cannot be NULL, which means these checks will always evaluate to false.

Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
Link: https://github.com/ClangBuiltLinux/linux/issues/915
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
index 2c932c29f1f9..a9e1c01e9d9b 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
@@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
 		}
 	}
 
-	if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
+	if (!pipe_ctx)
 		return false;
 
 	// First, set the psr version
-- 
2.25.1

_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

^ permalink raw reply related	[flat|nested] 9+ messages in thread
* Re: [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
  2020-03-02 22:42 ` Nathan Chancellor
  (?)
@ 2020-03-03 21:58   ` Nick Desaulniers
  -1 siblings, 0 replies; 9+ messages in thread
From: Nick Desaulniers @ 2020-03-03 21:58 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: Harry Wentland, Leo Li, Alex Deucher, Christian König,
	David (ChunMing) Zhou, amd-gfx list, dri-devel, LKML,
	clang-built-linux

On Mon, Mar 2, 2020 at 2:43 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
> address of 'pipe_ctx->plane_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                          ~ ~~~~~~~~~~^~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
> address of 'pipe_ctx->stream_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                                                   ~ ~~~~~~~~~~^~~~~~~~~~
> 2 warnings generated.
>
> As long as pipe_ctx is not NULL, the address of members in this struct
> cannot be NULL, which means these checks will always evaluate to false.
>
> Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
> Link: https://github.com/ClangBuiltLinux/linux/issues/915
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Indeed, they are not pointers, and no members within `struct
plane_resource` or `struct stream_resource` seem to indicate that they
are somehow invalid.  Good job sleuthing out the correct fixes by tag.
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

> ---
>  drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> index 2c932c29f1f9..a9e1c01e9d9b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> @@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
>                 }
>         }
>
> -       if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
> +       if (!pipe_ctx)
>                 return false;
>
>         // First, set the psr version
> --
> 2.25.1
>


-- 
Thanks,
~Nick Desaulniers

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-03 21:58   ` Nick Desaulniers
  0 siblings, 0 replies; 9+ messages in thread
From: Nick Desaulniers @ 2020-03-03 21:58 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: Leo Li, LKML, amd-gfx list, clang-built-linux, dri-devel,
	Alex Deucher, Christian König

On Mon, Mar 2, 2020 at 2:43 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
> address of 'pipe_ctx->plane_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                          ~ ~~~~~~~~~~^~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
> address of 'pipe_ctx->stream_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                                                   ~ ~~~~~~~~~~^~~~~~~~~~
> 2 warnings generated.
>
> As long as pipe_ctx is not NULL, the address of members in this struct
> cannot be NULL, which means these checks will always evaluate to false.
>
> Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
> Link: https://github.com/ClangBuiltLinux/linux/issues/915
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Indeed, they are not pointers, and no members within `struct
plane_resource` or `struct stream_resource` seem to indicate that they
are somehow invalid.  Good job sleuthing out the correct fixes by tag.
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

> ---
>  drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> index 2c932c29f1f9..a9e1c01e9d9b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> @@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
>                 }
>         }
>
> -       if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
> +       if (!pipe_ctx)
>                 return false;
>
>         // First, set the psr version
> --
> 2.25.1
>


-- 
Thanks,
~Nick Desaulniers
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-03 21:58   ` Nick Desaulniers
  0 siblings, 0 replies; 9+ messages in thread
From: Nick Desaulniers @ 2020-03-03 21:58 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: David (ChunMing) Zhou, Leo Li, LKML, amd-gfx list,
	clang-built-linux, dri-devel, Alex Deucher, Harry Wentland,
	Christian König

On Mon, Mar 2, 2020 at 2:43 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
> address of 'pipe_ctx->plane_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                          ~ ~~~~~~~~~~^~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
> address of 'pipe_ctx->stream_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                                                   ~ ~~~~~~~~~~^~~~~~~~~~
> 2 warnings generated.
>
> As long as pipe_ctx is not NULL, the address of members in this struct
> cannot be NULL, which means these checks will always evaluate to false.
>
> Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
> Link: https://github.com/ClangBuiltLinux/linux/issues/915
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Indeed, they are not pointers, and no members within `struct
plane_resource` or `struct stream_resource` seem to indicate that they
are somehow invalid.  Good job sleuthing out the correct fixes by tag.
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

> ---
>  drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> index 2c932c29f1f9..a9e1c01e9d9b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> @@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
>                 }
>         }
>
> -       if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
> +       if (!pipe_ctx)
>                 return false;
>
>         // First, set the psr version
> --
> 2.25.1
>


-- 
Thanks,
~Nick Desaulniers
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
  2020-03-02 22:42 ` Nathan Chancellor
  (?)
@ 2020-03-04 18:34   ` Alex Deucher
  -1 siblings, 0 replies; 9+ messages in thread
From: Alex Deucher @ 2020-03-04 18:34 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: Harry Wentland, Leo Li, Alex Deucher, Christian König,
	David (ChunMing) Zhou, clang-built-linux,
	Maling list - DRI developers, amd-gfx list, LKML

On Mon, Mar 2, 2020 at 5:43 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
> address of 'pipe_ctx->plane_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                          ~ ~~~~~~~~~~^~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
> address of 'pipe_ctx->stream_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                                                   ~ ~~~~~~~~~~^~~~~~~~~~
> 2 warnings generated.
>
> As long as pipe_ctx is not NULL, the address of members in this struct
> cannot be NULL, which means these checks will always evaluate to false.
>
> Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
> Link: https://github.com/ClangBuiltLinux/linux/issues/915
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Applied.  Thanks!

Alex


> ---
>  drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> index 2c932c29f1f9..a9e1c01e9d9b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> @@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
>                 }
>         }
>
> -       if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
> +       if (!pipe_ctx)
>                 return false;
>
>         // First, set the psr version
> --
> 2.25.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-04 18:34   ` Alex Deucher
  0 siblings, 0 replies; 9+ messages in thread
From: Alex Deucher @ 2020-03-04 18:34 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: Leo Li, LKML, Maling list - DRI developers, clang-built-linux,
	amd-gfx list, Alex Deucher, Christian König

On Mon, Mar 2, 2020 at 5:43 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
> address of 'pipe_ctx->plane_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                          ~ ~~~~~~~~~~^~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
> address of 'pipe_ctx->stream_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                                                   ~ ~~~~~~~~~~^~~~~~~~~~
> 2 warnings generated.
>
> As long as pipe_ctx is not NULL, the address of members in this struct
> cannot be NULL, which means these checks will always evaluate to false.
>
> Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
> Link: https://github.com/ClangBuiltLinux/linux/issues/915
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Applied.  Thanks!

Alex


> ---
>  drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> index 2c932c29f1f9..a9e1c01e9d9b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> @@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
>                 }
>         }
>
> -       if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
> +       if (!pipe_ctx)
>                 return false;
>
>         // First, set the psr version
> --
> 2.25.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings
@ 2020-03-04 18:34   ` Alex Deucher
  0 siblings, 0 replies; 9+ messages in thread
From: Alex Deucher @ 2020-03-04 18:34 UTC (permalink / raw)
  To: Nathan Chancellor
  Cc: David (ChunMing) Zhou, Leo Li, LKML,
	Maling list - DRI developers, clang-built-linux, amd-gfx list,
	Alex Deucher, Harry Wentland, Christian König

On Mon, Mar 2, 2020 at 5:43 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:31: warning:
> address of 'pipe_ctx->plane_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                          ~ ~~~~~~~~~~^~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/../display/dc/dce/dmub_psr.c:147:56: warning:
> address of 'pipe_ctx->stream_res' will always evaluate to 'true'
> [-Wpointer-bool-conversion]
>         if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
>                                                   ~ ~~~~~~~~~~^~~~~~~~~~
> 2 warnings generated.
>
> As long as pipe_ctx is not NULL, the address of members in this struct
> cannot be NULL, which means these checks will always evaluate to false.
>
> Fixes: 4c1a1335dfe0 ("drm/amd/display: Driverside changes to support PSR in DMCUB")
> Link: https://github.com/ClangBuiltLinux/linux/issues/915
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

Applied.  Thanks!

Alex


> ---
>  drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> index 2c932c29f1f9..a9e1c01e9d9b 100644
> --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
> @@ -144,7 +144,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
>                 }
>         }
>
> -       if (!pipe_ctx || !&pipe_ctx->plane_res || !&pipe_ctx->stream_res)
> +       if (!pipe_ctx)
>                 return false;
>
>         // First, set the psr version
> --
> 2.25.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2020-03-04 18:35 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-03-02 22:42 [PATCH] drm/amd/display: Remove pointless NULL checks in dmub_psr_copy_settings Nathan Chancellor
2020-03-02 22:42 ` Nathan Chancellor
2020-03-02 22:42 ` Nathan Chancellor
2020-03-03 21:58 ` Nick Desaulniers
2020-03-03 21:58   ` Nick Desaulniers
2020-03-03 21:58   ` Nick Desaulniers
2020-03-04 18:34 ` Alex Deucher
2020-03-04 18:34   ` Alex Deucher
2020-03-04 18:34   ` Alex Deucher

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