diff options
| author | Borislav Petkov <bp@suse.de> | 2022-04-05 17:15:10 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2022-05-21 18:02:47 +0200 |
| commit | 6556551f8848f98eff356c8aacae42c8dd65b2df (patch) | |
| tree | 540553db65eb027d2551f6ce2d3b164324d9a222 | |
| parent | 0b4c48f3e315d172e4cc06e10f2c8ba180788baf (diff) | |
| download | linux-6556551f8848f98eff356c8aacae42c8dd65b2df.tar.bz2 | |
drm/r128: Fix undefined behavior due to shift overflowing the constant
Fix:
drivers/gpu/drm/r128/r128_cce.c: In function ‘r128_do_init_cce’:
drivers/gpu/drm/r128/r128_cce.c:417:2: error: case label does not reduce to an integer constant
case R128_PM4_64BM_64VCBM_64INDBM:
^~~~
drivers/gpu/drm/r128/r128_cce.c:418:2: error: case label does not reduce to an integer constant
case R128_PM4_64PIO_64VCPIO_64INDPIO:
^~~~
See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory
details as to why it triggers with older gccs only.
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220405151517.29753-5-bp@alien8.de
| -rw-r--r-- | drivers/gpu/drm/r128/r128_drv.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/r128/r128_drv.h b/drivers/gpu/drm/r128/r128_drv.h index 2e1bc01aa5c9..970e192b0d51 100644 --- a/drivers/gpu/drm/r128/r128_drv.h +++ b/drivers/gpu/drm/r128/r128_drv.h @@ -300,8 +300,8 @@ extern long r128_compat_ioctl(struct file *filp, unsigned int cmd, # define R128_PM4_64PIO_128INDBM (5 << 28) # define R128_PM4_64BM_128INDBM (6 << 28) # define R128_PM4_64PIO_64VCBM_64INDBM (7 << 28) -# define R128_PM4_64BM_64VCBM_64INDBM (8 << 28) -# define R128_PM4_64PIO_64VCPIO_64INDPIO (15 << 28) +# define R128_PM4_64BM_64VCBM_64INDBM (8U << 28) +# define R128_PM4_64PIO_64VCPIO_64INDPIO (15U << 28) # define R128_PM4_BUFFER_CNTL_NOUPDATE (1 << 27) #define R128_PM4_BUFFER_WM_CNTL 0x0708 |