myri10ge: fix potential infinite loop in enable_ecrc
Fix another potential for an infinite loop while looking for the
root port in myri10ge_enable_ecrc().
Signed-off-by: Brice Goglin <brice@myri.com>
Signed-off-by: Andrew Gallatin <gallatin@myri.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 9165a55..6526214 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -2657,13 +2657,14 @@
ext_type = (val & PCI_EXP_FLAGS_TYPE) >> 4;
if (ext_type != PCI_EXP_TYPE_ROOT_PORT) {
if (myri10ge_ecrc_enable > 1) {
- struct pci_dev *old_bridge = bridge;
+ struct pci_dev *prev_bridge, *old_bridge = bridge;
/* Walk the hierarchy up to the root port
* where ECRC has to be enabled */
do {
+ prev_bridge = bridge;
bridge = bridge->bus->self;
- if (!bridge) {
+ if (!bridge || prev_bridge == bridge) {
dev_err(dev,
"Failed to find root port"
" to force ECRC\n");