| Message ID | 1304073070-24526-4-git-send-email-bdefaria@adeneo-embedded.com |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Apr 29, 2011 at 4:01 PM, Bryan DE FARIA <bdefaria@adeneo-embedded.com> wrote: > When reading a subpage with a non dividable by 4 ecc number of byte, the > prefetch function gets first the extra bytes, then reads the bytes lefting. > Extra bytes are not returned in the buffer (they are overwritten), which makes > the software ecc fail. Its not only read, write too is broken for the same reason. More ever, it is broken for other path too (failing to enable prefetch engine path).
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index eab51da..728db14 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -267,7 +267,6 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len) else omap_read_buf8(mtd, buf, len); } else { - p = (u32 *) buf; do { r_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT); r_count = r_count >> 2;
When reading a subpage with a non dividable by 4 ecc number of byte, the prefetch function gets first the extra bytes, then reads the bytes lefting. Extra bytes are not returned in the buffer (they are overwritten), which makes the software ecc fail. Signed-off-by: Bryan DE FARIA <bdefaria@adeneo-embedded.com> --- drivers/mtd/nand/omap2.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-)