This is the first of three patches that implement a bit field that PCI Express device drivers can use to indicate they need a fundamental reset during error recovery.
By default, the EEH framework on powerpc does what's known as a "hot reset" during recovery of a PCI Express device. We've found a case where the device needs a "fundamental reset" to recover properly. The current PCI error recovery and EEH frameworks do not support this distinction.
The attached patch (courtesy of Richard Lary) adds a bit field to pci_dev that indicates whether the device requires a fundamental reset during recovery.
These patches supersede the previously submitted patch that implemented a fundamental reset bit field.
Please review and let me know of any concerns.
Signed-off-by: Mike Mason <mmlnx@xxxxxxxxxx>
Signed-off-by: Richard Lary <rlary@xxxxxxxxxx>
diff -uNrp a/include/linux/pci.h b/include/linux/pci.h
--- a/include/linux/pci.h 2009-07-13 14:25:37.000000000 -0700
+++ b/include/linux/pci.h 2009-07-15 10:25:37.000000000 -0700
@@ -273,6 +273,7 @@ struct pci_dev {
unsigned int ari_enabled:1; /* ARI forwarding */
unsigned int is_managed:1;
unsigned int is_pcie:1;
+ unsigned int needs_freset:1; /* Dev requires fundamental reset */
unsigned int state_saved:1;
unsigned int is_physfn:1;
unsigned int is_virtfn:1;
