[PATCH 1/3] Support for PCI Express reset type

From: Mike Mason <mmlnx@us.ibm.com>
To: linuxppc-dev@ozlabs.org, linux-pci@vger.kernel.org,
	linasvepstas@gmail.com, benh@kernel.crashing.org,
	Paul Mackerras <paulus@samba.org>
Cc: Richard Lary <rlary@us.ibm.com>
Subject: [PATCH 1/3] Support for PCI Express reset type
Date: Thu, 30 Jul 2009 15:33:21 -0700	[thread overview]
Message-ID: <4A721FB1.4040903@us.ibm.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 859 bytes --]

This is the first of three patches that implement a bit field that PCI Express device drivers can use to indicate they need a fundamental reset during error recovery.

By default, the EEH framework on powerpc does what's known as a "hot reset" during recovery of a PCI Express device.  We've found a case where the device needs a "fundamental reset" to recover properly.  The current PCI error recovery and EEH frameworks do not support this distinction.

The attached patch (courtesy of Richard Lary) adds a bit field to pci_dev that indicates whether the device requires a fundamental reset during recovery.

These patches supersede the previously submitted patch that implemented a fundamental reset bit field. 

Please review and let me know of any concerns.

Signed-off-by: Mike Mason <mmlnx@us.ibm.com>
Signed-off-by: Richard Lary <rlary@us.ibm.com>
 


[-- Attachment #2: pci_fundamental_reset.patch --]
[-- Type: text/plain, Size: 490 bytes --]

diff -uNrp a/include/linux/pci.h b/include/linux/pci.h

--- a/include/linux/pci.h	2009-07-13 14:25:37.000000000 -0700
+++ b/include/linux/pci.h	2009-07-15 10:25:37.000000000 -0700
@@ -273,6 +273,7 @@ struct pci_dev {
 	unsigned int	ari_enabled:1;	/* ARI forwarding */
 	unsigned int	is_managed:1;
 	unsigned int	is_pcie:1;
+	unsigned int    needs_freset:1; /* Dev requires fundamental reset */
 	unsigned int	state_saved:1;
 	unsigned int	is_physfn:1;
 	unsigned int	is_virtfn:1;
