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s390/pci: Highlight failure to enable PCI function

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Emit an error log when a PCI function cannot be enabled for use, despite
being reported as configured to the system.

This brings to attention situations where functions might go missing
without notice. Going unnoticed is less likely when functions are added
to the system through hotplug, but will produce the same error log.

Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Gerd Bayer 2025-10-21 10:57:16 +02:00 committed by Heiko Carstens
parent 5c02c74dd4
commit 564ebcae6a
1 changed files with 3 additions and 1 deletions
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4
arch/s390/pci/pci_bus.c
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@ -45,8 +45,10 @@ static int zpci_bus_prepare_device(struct zpci_dev *zdev)
if (!zdev_enabled(zdev)) {
rc = zpci_enable_device(zdev);
if (rc)
if (rc) {
pr_err("Enabling PCI function %08x failed\n", zdev->fid);
return rc;
}
}
if (!zdev->has_resources) {