[PATCH] Fix PCI error token awkward value

[linas@austin.ibm.com (Linas Vepstas)]

The pci channel state token currently has a poor choice of values;
there  are two ways of indicating that "everything's OK": 0 and 1.
This is a bit of a burden.

If a devce driver wants to check if the pci channel is in a working
or a disconnected state, the driver writer must perform checks similar
to

   if((pdev->error_state != 0) &&
      (pdev->error_state != pci_channel_io_normal)) {
         whatever();
   }

which is rather akward. The first check is needed because 
stuct pci_dev is inited to all-zeros. The scond is needed 
because the error recovery will set the state to 
pci_channel_io_normal (which is not zero).

This patch fixes this awkwardness.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>

----

 include/linux/pci.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.17-mm3/include/linux/pci.h
===================================================================
--- linux-2.6.17-mm3.orig/include/linux/pci.h	2006-06-27 11:39:16.000000000 -0500
+++ linux-2.6.17-mm3/include/linux/pci.h	2006-07-06 15:15:09.000000000 -0500
@@ -85,7 +85,7 @@ typedef unsigned int __bitwise pci_chann
 
 enum pci_channel_state {
 	/* I/O channel is in normal state */
-	pci_channel_io_normal = (__force pci_channel_state_t) 1,
+	pci_channel_io_normal = (__force pci_channel_state_t) 0,
 
 	/* I/O to channel is blocked */
 	pci_channel_io_frozen = (__force pci_channel_state_t) 2,