Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

[pandora-kernel.git] / drivers / mtd / ubi / build.c

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index a801ea6..65626c1 100644 (file)
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -690,11 +690,25 @@ static int io_init(struct ubi_device *ubi)
        ubi_assert(ubi->hdrs_min_io_size <= ubi->min_io_size);
        ubi_assert(ubi->min_io_size % ubi->hdrs_min_io_size == 0);
 
+       ubi->max_write_size = ubi->mtd->writebufsize;
+       /*
+        * Maximum write size has to be greater or equivalent to min. I/O
+        * size, and be multiple of min. I/O size.
+        */
+       if (ubi->max_write_size < ubi->min_io_size ||
+           ubi->max_write_size % ubi->min_io_size ||
+           !is_power_of_2(ubi->max_write_size)) {
+               ubi_err("bad write buffer size %d for %d min. I/O unit",
+                       ubi->max_write_size, ubi->min_io_size);
+               return -EINVAL;
+       }
+
        /* Calculate default aligned sizes of EC and VID headers */
        ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size);
        ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size);
 
        dbg_msg("min_io_size      %d", ubi->min_io_size);
+       dbg_msg("max_write_size   %d", ubi->max_write_size);
        dbg_msg("hdrs_min_io_size %d", ubi->hdrs_min_io_size);
        dbg_msg("ec_hdr_alsize    %d", ubi->ec_hdr_alsize);
        dbg_msg("vid_hdr_alsize   %d", ubi->vid_hdr_alsize);