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ACPI: fix single linked list manipulation

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Fix 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 infinite loop doesn't happen.  Because the only user of
acpi_pci_register_dirver() is acpiphp.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Akinobu Mita 2006-12-19 12:56:09 -08:00 committed by Len Brown
parent 9185cfa925
commit f10bb2544b
1 changed files with 5 additions and 4 deletions
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9
drivers/acpi/pci_root.c
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@ -98,11 +98,12 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
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;