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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-18 10:50:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-18 10:50:27 -0700
commit8f627a8a881481598c2591c3acc122fb9be7bac4 (patch)
tree06497d25e30824500aeaf8c736c45b070f121234 /drivers/mtd/ubi
parentfd57ed021990157ee5b3997c3f21c734093a9e23 (diff)
parent5d630e43284fdb0613e4e7e7dd906f27bc25b6af (diff)
Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6
* 'linux-next' of git://git.infradead.org/ubifs-2.6: (25 commits) UBIFS: clean-up commentaries UBIFS: save 128KiB or more RAM UBIFS: allocate orphans scan buffer on demand UBIFS: allocate lpt dump buffer on demand UBIFS: allocate ltab checking buffer on demand UBIFS: allocate scanning buffer on demand UBIFS: allocate dump buffer on demand UBIFS: do not check data crc by default UBIFS: simplify UBIFS Kconfig menu UBIFS: print max. index node size UBIFS: handle allocation failures in UBIFS write path UBIFS: use max_write_size during recovery UBIFS: use max_write_size for write-buffers UBIFS: introduce write-buffer size field UBI: incorporate LEB offset information UBIFS: incorporate maximum write size UBI: provide LEB offset information UBI: incorporate maximum write size UBIFS: fix LEB number in printk UBIFS: restrict world-writable debugfs files ...
Diffstat (limited to 'drivers/mtd/ubi')
-rw-r--r--drivers/mtd/ubi/build.c14
-rw-r--r--drivers/mtd/ubi/kapi.c2
-rw-r--r--drivers/mtd/ubi/ubi.h3
3 files changed, 19 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index a801ea6b8b6..65626c1c446 100644
--- 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);
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index 69fa4ef03c5..d39716e5b20 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -40,7 +40,9 @@ void ubi_do_get_device_info(struct ubi_device *ubi, struct ubi_device_info *di)
{
di->ubi_num = ubi->ubi_num;
di->leb_size = ubi->leb_size;
+ di->leb_start = ubi->leb_start;
di->min_io_size = ubi->min_io_size;
+ di->max_write_size = ubi->max_write_size;
di->ro_mode = ubi->ro_mode;
di->cdev = ubi->cdev.dev;
}
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 49c864d175d..f1be8b79663 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -382,6 +382,8 @@ struct ubi_wl_entry;
* @bad_allowed: whether the MTD device admits of bad physical eraseblocks or
* not
* @nor_flash: non-zero if working on top of NOR flash
+ * @max_write_size: maximum amount of bytes the underlying flash can write at a
+ * time (MTD write buffer size)
* @mtd: MTD device descriptor
*
* @peb_buf1: a buffer of PEB size used for different purposes
@@ -463,6 +465,7 @@ struct ubi_device {
int vid_hdr_shift;
unsigned int bad_allowed:1;
unsigned int nor_flash:1;
+ int max_write_size;
struct mtd_info *mtd;
void *peb_buf1;