From: Jonas Gorski <jogo@openwrt.org>
Date: Sun, 6 Apr 2014 22:03:42 +0000 (+0000)
Subject: brcm63xx: hack around jffs2 corruption with SMP
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=dba8a58b46ae36f95addf138cfb00594293d53fe;p=openwrt%2Fstaging%2Flinusw.git

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>

SVN-Revision: 40396
---

diff --git a/target/linux/brcm63xx/patches-3.10/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch b/target/linux/brcm63xx/patches-3.10/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch
new file mode 100644
index 0000000000..8b603e8b66
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.10/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch
@@ -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)))));
+ };
+ 
+ /*
diff --git a/target/linux/brcm63xx/patches-3.14/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch b/target/linux/brcm63xx/patches-3.14/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch
new file mode 100644
index 0000000000..8b603e8b66
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.14/803-jffs2-work-around-unaligned-accesses-failing-on-bcm6.patch
@@ -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)))));
+ };
+ 
+ /*