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authorBrice Goglin <brice@myri.com>2008-05-09 02:19:29 +0200
committerJeff Garzik <jgarzik@redhat.com>2008-05-13 01:30:29 -0400
commiteca3fd83436853483837f010d9c3fefafa46a15c (patch)
treec75d964144f366486ade050f643ec0980203b25f /drivers/net/myri10ge/myri10ge.c
parent99f5f87eb689c5766fa2c101fe75310a7f9ba3cd (diff)
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>
Diffstat (limited to 'drivers/net/myri10ge/myri10ge.c')
-rw-r--r--drivers/net/myri10ge/myri10ge.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index 9165a55f811..6526214f69d 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -2657,13 +2657,14 @@ static void myri10ge_enable_ecrc(struct myri10ge_priv *mgp)
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");