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Message-ID: <20061028185313.GK9973@localhost>
Date: Sun, 29 Oct 2006 03:53:13 +0900
From: Akinobu Mita <akinobu.mita@...il.com>
To: linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Cc: Len Brown <len.brown@...el.com>
Subject: [PATCH] acpi: fix single linked list manipulation
This patch fixes single linked list manipulation for sub_driver.
If the remving entry is not on the head of the sub_driver list,
it goes into infinate loop.
Though that infinate loop doesn't happen. Because the only user of
acpi_pci_register_dirver() is acpiphp.
Cc: Len Brown <len.brown@...el.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
drivers/acpi/pci_root.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
Index: work-fault-inject/drivers/acpi/pci_root.c
===================================================================
--- work-fault-inject.orig/drivers/acpi/pci_root.c
+++ work-fault-inject/drivers/acpi/pci_root.c
@@ -98,11 +98,12 @@ void acpi_pci_unregister_driver(struct a
struct acpi_pci_driver **pptr = &sub_driver;
while (*pptr) {
- if (*pptr != driver)
- continue;
- *pptr = (*pptr)->next;
- break;
+ if (*pptr == driver)
+ break;
+ pptr = &(*pptr)->next;
}
+ BUG_ON(!*pptr);
+ *pptr = (*pptr)->next;
if (!driver->remove)
return;
-
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