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authorhcg <hcg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-03-23 08:23:04 +0000
committerhcg <hcg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-03-23 08:23:04 +0000
commit09cfea7639664299df7c98782d80304817ebb3d1 (patch)
treeeadabfd4d0a401ae7d1aa07ad091d28ffa39daef /target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch
parent5034ff8395447d72b427867fc3469b3601cd83f2 (diff)
[omap35xx] Add patch to correct sub-page alignment
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26274 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch')
-rw-r--r--target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch22
1 files changed, 22 insertions, 0 deletions
diff --git a/target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch b/target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch
new file mode 100644
index 0000000000..4bb854db6d
--- /dev/null
+++ b/target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch
@@ -0,0 +1,22 @@
+diff -urN linux-2.6.38.old/drivers/mtd/nand/omap2.c linux-2.6.38/drivers/mtd/nand/omap2.c
+--- linux-2.6.38.old/drivers/mtd/nand/omap2.c 2011-03-15 02:20:32.000000000 +0100
++++ linux-2.6.38/drivers/mtd/nand/omap2.c 2011-03-21 15:05:21.000000000 +0100
+@@ -245,6 +245,18 @@
+ int ret = 0;
+ u32 *p = (u32 *)buf;
+
++ /* u32 align the buffer and read */
++ /* NB: This assumes the buf ptr can be aligned *down* which is a valid.
++ * Assumption when dealing with ecc buffers etc.
++ */
++ u32 addr = (u32)p;
++
++ int diff = addr & 3;
++ addr -= diff;
++ len += diff;
++ len = (len + 3) & ~3;
++ p = (u32 *)addr;
++
+ /* take care of subpage reads */
+ if (len % 4) {
+ if (info->nand.options & NAND_BUSWIDTH_16)