Add patch to correct sub-page alignment

SVN-Revision: 26274
2011-03-23 08:23:04 +00:00 · 2011-03-23 08:23:04 +00:00 · 4a3f0f9769
parent ee7f3d21f4
commit 4a3f0f9769
1 changed files with 22 additions and 0 deletions
--- 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
@ -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)