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| author |   Chen Gang <gang.chen.5i5j@gmail.com> | 2014-10-06 11:04:45 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2014-11-05 21:14:08 -0700 |
| commit | 23cf1d006f1a32cebf7ac6910ac6bcf41adfd702 (patch) | |
| tree | 49bae1bd2e35636615f857a3a3e4e23a9f5e70ea /drivers/pci/xen-pcifront.c | |
| parent | Linux 3.18-rc1 (diff) | |
| download | linux-dev-23cf1d006f1a32cebf7ac6910ac6bcf41adfd702.tar.xz linux-dev-23cf1d006f1a32cebf7ac6910ac6bcf41adfd702.zip | |
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.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c index 116ca3746adb..93316504f567 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) |