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* [PATCH 1/3] gpu: drm: dead code elimination
@ 2019-12-18  3:49 ` Pan Zhang
  0 siblings, 0 replies; 6+ messages in thread
From: Pan Zhang @ 2019-12-18  3:49 UTC (permalink / raw)
  To: zhangpan26, hushiyuan, alexander.deucher, christian.koenig,
	David1.Zhou, airlied, daniel, sam
  Cc: amd-gfx, dri-devel, linux-kernel

this set adds support for removal of gpu drm dead code.

patch1:
`num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255, 

so there is a impossible condition '(num > 255) => (0-255 > 255)'.

Signed-off-by: Pan Zhang <zhangpan26@huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
index 980c363..b4cc7c5 100644
--- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
@@ -76,11 +76,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan,
 		}
 		args.lpI2CDataOut = cpu_to_le16(out);
 	} else {
-		if (num > ATOM_MAX_HW_I2C_READ) {
-			DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num);
-			r = -EINVAL;
-			goto done;
-		}
 		args.ucRegIndex = 0;
 		args.lpI2CDataOut = 0;
 	}
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 1/3] gpu: drm: dead code elimination
@ 2019-12-18  3:49 ` Pan Zhang
  0 siblings, 0 replies; 6+ messages in thread
From: Pan Zhang @ 2019-12-18  3:49 UTC (permalink / raw)
  To: zhangpan26, hushiyuan, alexander.deucher, christian.koenig,
	David1.Zhou, airlied, daniel, sam
  Cc: dri-devel, amd-gfx, linux-kernel

this set adds support for removal of gpu drm dead code.

patch1:
`num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255, 

so there is a impossible condition '(num > 255) => (0-255 > 255)'.

Signed-off-by: Pan Zhang <zhangpan26@huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
index 980c363..b4cc7c5 100644
--- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
@@ -76,11 +76,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan,
 		}
 		args.lpI2CDataOut = cpu_to_le16(out);
 	} else {
-		if (num > ATOM_MAX_HW_I2C_READ) {
-			DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num);
-			r = -EINVAL;
-			goto done;
-		}
 		args.ucRegIndex = 0;
 		args.lpI2CDataOut = 0;
 	}
-- 
2.7.4

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

^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH 1/3] gpu: drm: dead code elimination
@ 2019-12-18  3:49 ` Pan Zhang
  0 siblings, 0 replies; 6+ messages in thread
From: Pan Zhang @ 2019-12-18  3:49 UTC (permalink / raw)
  To: zhangpan26, hushiyuan, alexander.deucher, christian.koenig,
	David1.Zhou, airlied, daniel, sam
  Cc: dri-devel, amd-gfx, linux-kernel

this set adds support for removal of gpu drm dead code.

patch1:
`num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255, 

so there is a impossible condition '(num > 255) => (0-255 > 255)'.

Signed-off-by: Pan Zhang <zhangpan26@huawei.com>
---
 drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
index 980c363..b4cc7c5 100644
--- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
@@ -76,11 +76,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan,
 		}
 		args.lpI2CDataOut = cpu_to_le16(out);
 	} else {
-		if (num > ATOM_MAX_HW_I2C_READ) {
-			DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num);
-			r = -EINVAL;
-			goto done;
-		}
 		args.ucRegIndex = 0;
 		args.lpI2CDataOut = 0;
 	}
-- 
2.7.4

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

^ permalink raw reply related	[flat|nested] 6+ messages in thread
* Re: [PATCH 1/3] gpu: drm: dead code elimination
  2019-12-18  3:49 ` Pan Zhang
  (?)
@ 2019-12-18 20:11   ` Alex Deucher
  -1 siblings, 0 replies; 6+ messages in thread
From: Alex Deucher @ 2019-12-18 20:11 UTC (permalink / raw)
  To: Pan Zhang
  Cc: hushiyuan, Deucher, Alexander, Christian Koenig, Chunming Zhou,
	Dave Airlie, Daniel Vetter, Sam Ravnborg,
	Maling list - DRI developers, amd-gfx list, LKML

On Wed, Dec 18, 2019 at 3:13 AM Pan Zhang <zhangpan26@huawei.com> wrote:
>
> this set adds support for removal of gpu drm dead code.
>
> patch1:
> `num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255,
>
> so there is a impossible condition '(num > 255) => (0-255 > 255)'.
>
> Signed-off-by: Pan Zhang <zhangpan26@huawei.com>

This change was already made by someone else.

Alex


> ---
>  drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> index 980c363..b4cc7c5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> @@ -76,11 +76,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan,
>                 }
>                 args.lpI2CDataOut = cpu_to_le16(out);
>         } else {
> -               if (num > ATOM_MAX_HW_I2C_READ) {
> -                       DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num);
> -                       r = -EINVAL;
> -                       goto done;
> -               }
>                 args.ucRegIndex = 0;
>                 args.lpI2CDataOut = 0;
>         }
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [PATCH 1/3] gpu: drm: dead code elimination
@ 2019-12-18 20:11   ` Alex Deucher
  0 siblings, 0 replies; 6+ messages in thread
From: Alex Deucher @ 2019-12-18 20:11 UTC (permalink / raw)
  To: Pan Zhang
  Cc: hushiyuan, LKML, Maling list - DRI developers, Dave Airlie,
	amd-gfx list, Deucher, Alexander, Sam Ravnborg, Christian Koenig

On Wed, Dec 18, 2019 at 3:13 AM Pan Zhang <zhangpan26@huawei.com> wrote:
>
> this set adds support for removal of gpu drm dead code.
>
> patch1:
> `num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255,
>
> so there is a impossible condition '(num > 255) => (0-255 > 255)'.
>
> Signed-off-by: Pan Zhang <zhangpan26@huawei.com>

This change was already made by someone else.

Alex


> ---
>  drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> index 980c363..b4cc7c5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> @@ -76,11 +76,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan,
>                 }
>                 args.lpI2CDataOut = cpu_to_le16(out);
>         } else {
> -               if (num > ATOM_MAX_HW_I2C_READ) {
> -                       DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num);
> -                       r = -EINVAL;
> -                       goto done;
> -               }
>                 args.ucRegIndex = 0;
>                 args.lpI2CDataOut = 0;
>         }
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: [PATCH 1/3] gpu: drm: dead code elimination
@ 2019-12-18 20:11   ` Alex Deucher
  0 siblings, 0 replies; 6+ messages in thread
From: Alex Deucher @ 2019-12-18 20:11 UTC (permalink / raw)
  To: Pan Zhang
  Cc: Chunming Zhou, hushiyuan, LKML, Maling list - DRI developers,
	Dave Airlie, amd-gfx list, Daniel Vetter, Deucher, Alexander,
	Sam Ravnborg, Christian Koenig

On Wed, Dec 18, 2019 at 3:13 AM Pan Zhang <zhangpan26@huawei.com> wrote:
>
> this set adds support for removal of gpu drm dead code.
>
> patch1:
> `num` is a data of u8 type and ATOM_MAX_HW_I2C_READ == 255,
>
> so there is a impossible condition '(num > 255) => (0-255 > 255)'.
>
> Signed-off-by: Pan Zhang <zhangpan26@huawei.com>

This change was already made by someone else.

Alex


> ---
>  drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> index 980c363..b4cc7c5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> @@ -76,11 +76,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan,
>                 }
>                 args.lpI2CDataOut = cpu_to_le16(out);
>         } else {
> -               if (num > ATOM_MAX_HW_I2C_READ) {
> -                       DRM_ERROR("hw i2c: tried to read too many bytes (%d vs 255)\n", num);
> -                       r = -EINVAL;
> -                       goto done;
> -               }
>                 args.ucRegIndex = 0;
>                 args.lpI2CDataOut = 0;
>         }
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
_______________________________________________
amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-12-18 20:11 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-12-18  3:49 [PATCH 1/3] gpu: drm: dead code elimination Pan Zhang
2019-12-18  3:49 ` Pan Zhang
2019-12-18  3:49 ` Pan Zhang
2019-12-18 20:11 ` Alex Deucher
2019-12-18 20:11   ` Alex Deucher
2019-12-18 20:11   ` Alex Deucher

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