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authorChen Gang <gang.chen.5i5j@gmail.com>2014-10-06 03:04:45 (GMT)
committerBjorn Helgaas <bhelgaas@google.com>2014-11-06 04:14:08 (GMT)
commit23cf1d006f1a32cebf7ac6910ac6bcf41adfd702 (patch)
tree49bae1bd2e35636615f857a3a3e4e23a9f5e70ea /drivers/pci/xen-pcifront.c
parentf114040e3ea6e07372334ade75d1ee0775c355e1 (diff)
downloadlinux-23cf1d006f1a32cebf7ac6910ac6bcf41adfd702.tar.xz
xen/pcifront: Process failure for pcifront_(re)scan_root()
When pcifront_try_connect() finds no PCI roots, it falls back to calling pcifront_scan_root() for 0000:00. If that fails, it used to switch to XenbusStateConnected and return success (because xenbus_switch_state() currently always succeeds). If pcifront_scan_root() fails, leave the XenbusState unchanged and return an error code. Similarly, pcifront_attach_devices() falls back to calling pcifront_rescan_root() for 0000:00. If that fails, it used to switch to XenbusStateConnected and return an error code. If pcifront_rescan_root() fails, leave the XenbusState unchanged and return the error code. [bhelgaas: changelog] Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/pci/xen-pcifront.c')
-rw-r--r--drivers/pci/xen-pcifront.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 116ca37..9331650 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -866,6 +866,11 @@ static int pcifront_try_connect(struct pcifront_device *pdev)
xenbus_dev_error(pdev->xdev, err,
"No PCI Roots found, trying 0000:00");
err = pcifront_scan_root(pdev, 0, 0);
+ if (err) {
+ xenbus_dev_fatal(pdev->xdev, err,
+ "Error scanning PCI root 0000:00");
+ goto out;
+ }
num_roots = 0;
} else if (err != 1) {
if (err == 0)
@@ -947,6 +952,11 @@ static int pcifront_attach_devices(struct pcifront_device *pdev)
xenbus_dev_error(pdev->xdev, err,
"No PCI Roots found, trying 0000:00");
err = pcifront_rescan_root(pdev, 0, 0);
+ if (err) {
+ xenbus_dev_fatal(pdev->xdev, err,
+ "Error scanning PCI root 0000:00");
+ goto out;
+ }
num_roots = 0;
} else if (err != 1) {
if (err == 0)