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brcm63xx: hack around jffs2 corruption with SMP 

mempy_fromio seems to be randomly failing when the destination is
unaligned; work around it by forcing the name to be aligned in memory.

Should fix jffs2 and SMP for now, but needs to be some additional
looking into as it does not fix the source.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40396 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Jonas Gorski 2014-04-06 22:03:42 +00:00
parent c580cc13d7
commit 788655ef85
2 changed files with 52 additions and 0 deletions
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26
target/linux/brcm63xx/patches-3.10/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch Normal file
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@ -0,0 +1,26 @@
From ff3409ab17d56450943364ba49a16960e3cdda9b Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Sun, 6 Apr 2014 22:33:16 +0200
Subject: [RFC] jffs2: work around unaligned accesses failing on bcm63xx/smp
Unligned memcpy_fromio randomly fails with an unaligned dst. Work around
it by ensuring we are always doing aligned copies.
Should fix filename corruption in jffs2 with SMP.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
fs/jffs2/nodelist.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -255,7 +255,7 @@ struct jffs2_full_dirent
uint32_t ino; /* == zero for unlink */
unsigned int nhash;
unsigned char type;
- unsigned char name[0];
+ unsigned char name[0] __attribute__((aligned((sizeof(long)))));
};
/*

26
target/linux/brcm63xx/patches-3.14/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch Normal file
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@ -0,0 +1,26 @@
From ff3409ab17d56450943364ba49a16960e3cdda9b Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jogo@openwrt.org>
Date: Sun, 6 Apr 2014 22:33:16 +0200
Subject: [RFC] jffs2: work around unaligned accesses failing on bcm63xx/smp
Unligned memcpy_fromio randomly fails with an unaligned dst. Work around
it by ensuring we are always doing aligned copies.
Should fix filename corruption in jffs2 with SMP.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
---
fs/jffs2/nodelist.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/jffs2/nodelist.h
+++ b/fs/jffs2/nodelist.h
@@ -255,7 +255,7 @@ struct jffs2_full_dirent
uint32_t ino; /* == zero for unlink */
unsigned int nhash;
unsigned char type;
- unsigned char name[0];
+ unsigned char name[0] __attribute__((aligned((sizeof(long)))));
};
/*