tree 49bae1bd2e35636615f857a3a3e4e23a9f5e70ea
parent f114040e3ea6e07372334ade75d1ee0775c355e1
author Chen Gang <gang.chen.5i5j@gmail.com> 1412564685 +0800
committer Bjorn Helgaas <bhelgaas@google.com> 1415247248 -0700

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>