ALSA: au88x0: Fix incorrect error handling for PCI config reads

__snd_vortex_probe() uses pci_read_config_word() that returns PCIBIOS_*
codes (positive values on error). However, the function checks 'err < 0'
which can never be true for PCIBIOS_* codes, causing errors to be silently
ignored.

Check for non-zero return value and convert PCIBIOS_* codes using
pcibios_err_to_errno() into normal errno before returning them.

Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Reviewed-by: Philipp Stanner <phasta@kernel.org>
Link: https://patch.msgid.link/20251117065559.1138-1-vulab@iscas.ac.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Author: ISCAS-Vulab

sound/pci/au88x0/au88x0.c

@@ -280,11 +280,11 @@ __snd_vortex_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)
 
 	// (5)
 	err = pci_read_config_word(pci, PCI_DEVICE_ID, &chip->device);
-	if (err < 0)
-		return err;
+	if (err)
+		return pcibios_err_to_errno(err);
 	err = pci_read_config_word(pci, PCI_VENDOR_ID, &chip->vendor);
-	if (err < 0)
-		return err;
+	if (err)
+		return pcibios_err_to_errno(err);
 	chip->rev = pci->revision;
 #ifdef CHIP_AU8830
 	if ((chip->rev) != 0xfe && (chip->rev) != 0xfa) {