Commit 6b01d30e authored by Mart Gerrits's avatar Mart Gerrits Committed by Wim Van Sebroeck

watchdog: Fix POST failure on ASUS P5N32-E SLI and similar boards

At present the module does not unset the NO_REBOOT bit upon shutdown, this
causes the BIOS to fail the POST once and reset. During the next boot it
displays the following error message:

***** Warning: System BOOT Fail *****
Your system last boot fail or POST interrupted.
Please enter setup to load default and reboot again.
Press F1 to continue, DEL to enter SETUP

With this patch the NO_REBOOT flag will be unset on shutdown and thus stop
this failure from occurring.

Tested on 'ASUS P5N32-E SLI with BIOS revision 1801' and
          'ASUS P5N32-E SLI PLUS with BIOS revision 1502'.
Signed-off-by: default avatarMart Gerrits <>
Signed-off-by: default avatarWim Van Sebroeck <>
parent bea19066
......@@ -458,7 +458,15 @@ static int __devexit nv_tco_remove(struct platform_device *dev)
static void nv_tco_shutdown(struct platform_device *dev)
u32 val;
/* Some BIOSes fail the POST (once) if the NO_REBOOT flag is not
* unset during shutdown. */
pci_read_config_dword(tco_pci, MCP51_SMBUS_SETUP_B, &val);
pci_write_config_dword(tco_pci, MCP51_SMBUS_SETUP_B, val);
static struct platform_driver nv_tco_driver = {
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment