[PATCH v3 04/10] ASoC: Intel: avs: Clean up the bus when fetching ML caps fails

[Cezary Rojewski <cezary.rojewski@intel.com>]

snd_hdac_ext_bus_get_ml_capabilities() may fail and its return code
shall be checked and accounted for. Address the issue by updating the
error-path for avs_pci_probe().

At the same time, if the function in question succeeds but the next part
of avs_pci_probe() fails, the hlink list shall be cleaned up before
leaving the scope.

Fixes: 1affc44ea5dd ("ASoC: Intel: avs: PCI driver implementation")
Co-developed-by: Amadeusz Sławiński <amade@asmblr.net>
Signed-off-by: Amadeusz Sławiński <amade@asmblr.net>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
---
 sound/soc/intel/avs/core.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/sound/soc/intel/avs/core.c b/sound/soc/intel/avs/core.c
index f45256ff5bac..8f27a7d43718 100644
--- a/sound/soc/intel/avs/core.c
+++ b/sound/soc/intel/avs/core.c
@@ -475,8 +475,13 @@ static int avs_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 	}
 
 	snd_hdac_bus_parse_capabilities(bus);
-	if (bus->mlcap)
-		snd_hdac_ext_bus_get_ml_capabilities(bus);
+	if (bus->mlcap) {
+		ret = snd_hdac_ext_bus_get_ml_capabilities(bus);
+		if (ret < 0) {
+			dev_err(dev, "failed to get ml capabilities: %d\n", ret);
+			goto err_ml_cap;
+		}
+	}
 
 	if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
 		dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
@@ -518,6 +523,8 @@ static int avs_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 	snd_hdac_bus_free_stream_pages(bus);
 	snd_hdac_ext_stream_free_all(bus);
 err_init_streams:
+	snd_hdac_ext_link_free_all(bus);
+err_ml_cap:
 	iounmap(adev->dsp_ba);
 err_remap_bar4:
 	iounmap(bus->remap_addr);
-- 
2.34.1