[PATCH v2] drm/amd/amdgpu: Fix an uninitialized variable

[Srinivasan Shanmugam]

  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 at amd.com>
Cc: Mario Limonciello <mario.limonciello at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam at amd.com>
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