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Add patch to correct sub-page alignment

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SVN-Revision: 26274
This commit is contained in:
Hamish Guthrie 2011-03-23 08:23:04 +00:00
parent ee7f3d21f4
commit 4a3f0f9769
1 changed files with 22 additions and 0 deletions
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22
target/linux/omap35xx/patches-2.6.36/004-nand_subpage_align.patch Normal file
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@ -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)