Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.4 024/100] drm/amdgpu: remove always false comparison in 'amdgpu_atombios_i2c_process_i2c_ch' | Date | Fri, 14 Feb 2020 11:23:08 -0500 |
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From: yu kuai <yukuai3@huawei.com>
[ Upstream commit 220ac8d1444054ade07ce14498fcda266410f90e ]
Fixes gcc '-Wtype-limits' warning:
drivers/gpu/drm/amd/amdgpu/atombios_i2c.c: In function ‘amdgpu_atombios_i2c_process_i2c_ch’: drivers/gpu/drm/amd/amdgpu/atombios_i2c.c:79:11: warning: comparison is always false due to limited range of data type [-Wtype-limits]
'num' is 'u8', so it will never be greater than 'TOM_MAX_HW_I2C_READ', which is defined as 255. Therefore, the comparison can be removed.
Fixes: d38ceaf99ed0 ("drm/amdgpu: add core driver (v4)") Signed-off-by: yu kuai <yukuai3@huawei.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 13cdb01e9b450..59fd674128540 100644 --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c @@ -68,11 +68,6 @@ static int amdgpu_atombios_i2c_process_i2c_ch(struct amdgpu_i2c_chan *chan, memcpy(&out, &buf[1], num); 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; } -- 2.20.1
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