mmc: sdhci-pci: Convert PCIBIOS_* return codes to errnos

jmicron_pmos() and sdhci_pci_probe() use pci_{read,write}_config_byte()
that return PCIBIOS_* codes. The return code is then returned as is by
jmicron_probe() and sdhci_pci_probe(). Similarly, the return code is
also returned as is from jmicron_resume(). Both probe and resume
functions should return normal errnos.

Convert PCIBIOS_* returns code using pcibios_err_to_errno() into normal
errno before returning them the fix these issues.

Fixes: 7582041ff3d4 ("mmc: sdhci-pci: fix simple_return.cocci warnings")
Fixes: 45211e215984 ("sdhci: toggle JMicron PMOS setting")
Cc: [e-mail]
Signed-off-by: Ilpo Järvinen <[e-mail]>
Acked-by: Adrian Hunter <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/sdhci-pci-core.c

···
 
 	ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
 	if (ret)
-		return ret;
+		goto fail;
 
 	/*
 	 * Turn PMOS on [bit 0], set over current detection to 2.4 V
···
 	else
 		scratch &= ~0x47;
 
-	return pci_write_config_byte(chip->pdev, 0xAE, scratch);
+	ret = pci_write_config_byte(chip->pdev, 0xAE, scratch);
+
+fail:
+	return pcibios_err_to_errno(ret);
 }
 
 static int jmicron_probe(struct sdhci_pci_chip *chip)
···
 
 	ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
 	if (ret)
-		return ret;
+		return pcibios_err_to_errno(ret);
 
 	slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
 	dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
···
 
 	ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
 	if (ret)
-		return ret;
+		return pcibios_err_to_errno(ret);
 
 	first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;