This is a note to let you know that I've just added the patch titled
arch/powerpc/sysdev/fsl_rio.c: correct IECSR register clear
to the 3.0-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:
arch-powerpc-sysdev-fsl_rio.c-correct-iecsr-register-clear.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@kernel.org> know about it.
>From 671ee7f0ce62e4b991b47fcf1c161c3f710dabbc Mon Sep 17 00:00:00 2001
From: Liu Gang-B34182 <b34...@freescale.com>
Date: Thu, 25 Aug 2011 15:59:25 -0700
Subject: arch/powerpc/sysdev/fsl_rio.c: correct IECSR register clear
value
From: Liu Gang-B34182 <b34...@freescale.com>
commit 671ee7f0ce62e4b991b47fcf1c161c3f710dabbc upstream.
This bug causes the IECSR register clear failure. In this case, the RETE
(retry error threshold exceeded) interrupt will be generated and cannot be
cleared. So the related ISR may be called persistently.
The RETE bit in IECSR is cleared by writing a 1 to it.
Signed-off-by: Liu Gang <gang....@freescale.com>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Kumar Gala <ga...@kernel.crashing.org>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gre...@suse.de>
---
arch/powerpc/sysdev/fsl_rio.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -54,6 +54,7 @@
#define ODSR_CLEAR 0x1c00
#define LTLEECSR_ENABLE_ALL 0xFFC000FC
#define ESCSR_CLEAR 0x07120204
+#define IECSR_CLEAR 0x80000000
#define RIO_PORT1_EDCSR 0x0640
#define RIO_PORT2_EDCSR 0x0680
@@ -1089,11 +1090,11 @@ static void port_error_handler(struct ri
if (offset == 0) {
out_be32((u32 *)(rio_regs_win + RIO_PORT1_EDCSR), 0);
- out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), 0);
+ out_be32((u32 *)(rio_regs_win + RIO_PORT1_IECSR), IECSR_CLEAR);
out_be32((u32 *)(rio_regs_win + RIO_ESCSR), ESCSR_CLEAR);
} else {
out_be32((u32 *)(rio_regs_win + RIO_PORT2_EDCSR), 0);
- out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), 0);
+ out_be32((u32 *)(rio_regs_win + RIO_PORT2_IECSR), IECSR_CLEAR);
out_be32((u32 *)(rio_regs_win + RIO_PORT2_ESCSR), ESCSR_CLEAR);
}
}
Patches currently in stable-queue which might be from b34...@freescale.com are
queue-3.0/arch-powerpc-sysdev-fsl_rio.c-correct-iecsr-register-clear.patch
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