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s390/pci: add error message for UID collision
When UID checking was turned off during runtime in the underlying hypervisor, a PCI device may be attached with the same UID. This is already detected but happens silently. Add an error message so it can more easily be understood why a device was not added. Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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@ -27,6 +27,7 @@
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#include <linux/seq_file.h>
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#include <linux/jump_label.h>
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#include <linux/pci.h>
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#include <linux/printk.h>
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#include <asm/isc.h>
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#include <asm/airq.h>
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@ -659,6 +660,8 @@ static int zpci_alloc_domain(struct zpci_dev *zdev)
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spin_lock(&zpci_domain_lock);
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if (test_bit(zdev->domain, zpci_domain)) {
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spin_unlock(&zpci_domain_lock);
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pr_err("Adding PCI function %08x failed because domain %04x is already assigned\n",
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zdev->fid, zdev->domain);
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return -EEXIST;
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}
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set_bit(zdev->domain, zpci_domain);
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