On Mon, Jan 9, 2023 at 10:58 AM Srinivasan Shanmugam
<srinivasan.shanmugam@xxxxxxx> wrote:
>
> CC drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.o
> drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c:217:71: error: variable 'i' is uninitialized when used here [-Werror,-Wuninitialized]
> snprintf(fw_name, sizeof(fw_name), "amdgpu/%s%d.bin", ucode_prefix, i);
> ^
> drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c:207:16: note: initialize the variable 'i' to silence this warning
> int err = 0, i;
> ^
> = 0
>
> As suggested by Christian, buggy
> "snprintf(fw_name, sizeof(fw_name), "amdgpu/%s%d.bin", ucode_prefix, i);"
> shouldn't be "i" in the first place, but rather using "instance",
> because for instance greater than 0, we want to have different
> sdma firmware for different instance we add the instance number.
>
> Remove setting err to 0 as well. This is considered very bad coding style.
>
> Cc: Christian König <christian.koenig@xxxxxxx>
> Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> Change-Id: I2f1180af4f37bf1efd4d47e7bf64425b0b3809fb
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
> index 0e1e2521fe25a..e9b78739b9ff7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
> @@ -204,7 +204,7 @@ int amdgpu_sdma_init_microcode(struct amdgpu_device *adev,
> {
> struct amdgpu_firmware_info *info = NULL;
> const struct common_firmware_header *header = NULL;
> - int err = 0, i;
> + int err, i;
> const struct sdma_firmware_header_v2_0 *sdma_hdr;
> uint16_t version_major;
> char ucode_prefix[30];
> @@ -214,7 +214,7 @@ int amdgpu_sdma_init_microcode(struct amdgpu_device *adev,
> if (instance == 0)
> snprintf(fw_name, sizeof(fw_name), "amdgpu/%s.bin", ucode_prefix);
> else
> - snprintf(fw_name, sizeof(fw_name), "amdgpu/%s%d.bin", ucode_prefix, i);
> + snprintf(fw_name, sizeof(fw_name), "amdgpu/%s%d.bin", ucode_prefix, instance);
> err = amdgpu_ucode_request(adev, &adev->sdma.instance[instance].fw, fw_name);
> if (err)
> goto out;
> --
> 2.25.1
>
