[PATCH 07/11] ASoC: SOF: core: Skip firmware test for undefined fw_name

[Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>]

Some SOF drivers like AMD ACP do not always rely on a single static
firmware file, but may require multiple files having their names
dynamically computed on probe time, e.g. based on chip name.

In those cases, providing an invalid default_fw_filename in their
sof_dev_desc struct will prevent probing due to 'SOF firmware
and/or topology file not found' error.

Fix the issue by allowing drivers to omit initialization for this member
(or alternatively provide a dynamic override via ipc_file_profile_base)
and update sof_test_firmware_file() to verify the given profile data and
skip firmware testing if either fw_path or fw_name is not defined.

Fixes: 6c393ebbd74a ("ASoC: SOF: core: Implement IPC version fallback if firmware files are missing")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
 sound/soc/sof/fw-file-profile.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/sof/fw-file-profile.c b/sound/soc/sof/fw-file-profile.c
index 138a1ca2c4a8..e63700234df0 100644
--- a/sound/soc/sof/fw-file-profile.c
+++ b/sound/soc/sof/fw-file-profile.c
@@ -21,6 +21,9 @@ static int sof_test_firmware_file(struct device *dev,
 	const u32 *magic;
 	int ret;
 
+	if (!profile->fw_path || !profile->fw_name || !*profile->fw_name)
+		return 0;
+
 	fw_filename = kasprintf(GFP_KERNEL, "%s/%s", profile->fw_path,
 				profile->fw_name);
 	if (!fw_filename)
-- 
2.43.0