linux-kernel - [PATCH 1/2 v2]: Renumber PCI error enums to start at zero

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Message-ID: <20061102010854.GA3623@austin.ibm.com>
Date:	Wed, 1 Nov 2006 19:08:54 -0600
From:	linas@...tin.ibm.com (Linas Vepstas)
To:	gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org, linux-pci@...ey.karlin.mff.cuni.cz
Subject: [PATCH 1/2 v2]: Renumber PCI error enums to start at zero

On Wed, Nov 01, 2006 at 05:54:17PM -0600, Linas Vepstas wrote:
[...] 
Fix brain-disengaged error.

Greg,

This is a low-prioriity patch to fix an annoying numbering mistake. 
Please apply this (and the next patch) at net convenience.

--linas

Subject: [PATCH 1/2]: Renumber PCI error enums to start at zero

Renumber the PCI error enums to start at zero for "normal/online".
This allows un-initialized pci channel state (which defaults to zero)
to be interpreted as "normal".  Add very simple routine to check
state, just in case this ever has to be fiddled with again.

Signed-off-by: Linas Vepstas <linas@...as.org>

----
 include/linux/pci.h |   11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

Index: linux-2.6.19-rc4-git3/include/linux/pci.h
===================================================================
--- linux-2.6.19-rc4-git3.orig/include/linux/pci.h	2006-11-01 16:15:49.000000000 -0600
+++ linux-2.6.19-rc4-git3/include/linux/pci.h	2006-11-01 18:43:14.000000000 -0600
@@ -86,13 +86,13 @@ 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,
+	pci_channel_io_frozen = (__force pci_channel_state_t) 1,
 
 	/* PCI card is dead */
-	pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
+	pci_channel_io_perm_failure = (__force pci_channel_state_t) 2,
 };
 
 typedef unsigned short __bitwise pci_bus_flags_t;
@@ -180,6 +180,11 @@ struct pci_dev {
 #define	to_pci_dev(n) container_of(n, struct pci_dev, dev)
 #define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
 
+static inline int pci_channel_offline(struct pci_dev *pdev)
+{
+	return (pdev->error_state != pci_channel_io_normal);
+}
+
 static inline struct pci_cap_saved_state *pci_find_saved_cap(
 	struct pci_dev *pci_dev,char cap)
 {
-
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