This is a note to let you know that I've just added the patch titled
powerpc/powernv: Fix the hmi event version check.
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-powernv-fix-the-hmi-event-version-check.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6acbc5a1dab30aa8f7be7bf3852f343f89147ac5 Mon Sep 17 00:00:00 2001
From: Mahesh Salgaonkar <mahesh@xxxxxxxxxxxxxxxxxx>
Date: Thu, 20 Nov 2014 09:44:36 +0530
Subject: powerpc/powernv: Fix the hmi event version check.
From: Mahesh Salgaonkar <mahesh@xxxxxxxxxxxxxxxxxx>
commit 6acbc5a1dab30aa8f7be7bf3852f343f89147ac5 upstream.
The current HMI event structure is an ABI and carries a version field to
accommodate future changes without affecting/rearranging current structure
members that are valid for previous versions.
The current version check "if (hmi_evt->version != OpalHMIEvt_V1)"
doesn't accomodate the fact that the version number may change in
future.
If firmware starts returning an HMI event with version > 1, this check
will fail and no HMI information will be printed on older kernels.
This patch fixes this issue.
Signed-off-by: Mahesh Salgaonkar <mahesh@xxxxxxxxxxxxxxxxxx>
[mpe: Reword changelog]
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/platforms/powernv/opal-hmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/platforms/powernv/opal-hmi.c
+++ b/arch/powerpc/platforms/powernv/opal-hmi.c
@@ -57,7 +57,7 @@ static void print_hmi_event_info(struct
};
/* Print things out */
- if (hmi_evt->version != OpalHMIEvt_V1) {
+ if (hmi_evt->version < OpalHMIEvt_V1) {
pr_err("HMI Interrupt, Unknown event version %d !\n",
hmi_evt->version);
return;
Patches currently in stable-queue which might be from mahesh@xxxxxxxxxxxxxxxxxx are
queue-3.17/powerpc-powernv-fix-the-hmi-event-version-check.patch
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