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drm/amdgpu: Avoid printing of stack contents on firmware load error

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In case when psp_init_asd_microcode() fails to load ASD microcode file,
psp_v12_0_init_microcode() tries to print the firmware filename that
failed to load before bailing out.

This is wrong because:

- the firmware filename it would want it print is an incorrect one as
  psp_init_asd_microcode() and psp_v12_0_init_microcode() are loading
  different filenames
- it tries to print fw_name, but that's not yet been initialized by that
  time, so it prints random stack contents, e.g.

    amdgpu 0000:04:00.0: Direct firmware load for amdgpu/renoir_asd.bin failed with error -2
    amdgpu 0000:04:00.0: amdgpu: fail to initialize asd microcode
    amdgpu 0000:04:00.0: amdgpu: psp v12.0: Failed to load firmware "\xfeTO\x8e\xff\xff"

Fix that by bailing out immediately, instead of priting the bogus error
message.

Reported-by: Vojtech Pavlik <vojtech@ucw.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jiri Kosina 2021-06-24 13:11:36 +02:00 committed by Alex Deucher
parent 4ef87d8f10
commit 36f5f9d37e
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/amd/amdgpu/psp_v12_0.c
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@ -67,7 +67,7 @@ static int psp_v12_0_init_microcode(struct psp_context *psp)
err = psp_init_asd_microcode(psp, chip_name);
if (err)
goto out;
return err;
snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_ta.bin", chip_name);
err = request_firmware(&adev->psp.ta_fw, fw_name, adev->dev);
@ -80,7 +80,7 @@ static int psp_v12_0_init_microcode(struct psp_context *psp)
} else {
err = amdgpu_ucode_validate(adev->psp.ta_fw);
if (err)
goto out2;
goto out;
ta_hdr = (const struct ta_firmware_header_v1_0 *)
adev->psp.ta_fw->data;
@ -105,10 +105,9 @@ static int psp_v12_0_init_microcode(struct psp_context *psp)
return 0;
out2:
out:
release_firmware(adev->psp.ta_fw);
adev->psp.ta_fw = NULL;
out:
if (err) {
dev_err(adev->dev,
"psp v12.0: Failed to load firmware \"%s\"\n",