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| author | Arnd Bergmann <arnd@arndb.de> | 2012-03-15 15:19:05 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-03-15 15:20:07 +0000 |
| commit | f4e2467bad53023589cbff18dd1ab6e0aa3f004c (patch) | |
| tree | 8d7abbf418eabd25bbcdc9b6de2f8216d2eaa616 /drivers/md/dm-io.c | |
| parent | e3643b77de143c5548ec93abd8aa68f4123295ea (diff) | |
| parent | a6de3df4f172e124280d88e617ee7d29f7af970b (diff) | |
Merge branch 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6 into next/cleanup
* 'ep93xx-for-arm-soc' of git://github.com/RyanMallon/linux-2.6:
ep93xx: Remove unnecessary includes of ep93xx-regs.h
ep93xx: Move EP93XX_SYSCON defines to SoC private header
ep93xx: Move crunch code to mach-ep93xx directory
ep93xx: Make syscon access functions private to SoC
ep93xx: Configure GPIO ports in core code
ep93xx: Move peripheral defines to local SoC header
ep93xx: Convert the watchdog driver into a platform device.
ep93xx: Use ioremap for backlight driver
ep93xx: Move GPIO defines to gpio-ep93xx.h
ep93xx: Don't use system controller defines in audio drivers
ep93xx: Move PHYS_BASE defines to local SoC header file
(update to v3.3-rc7)
Conflicts:
arch/arm/mach-s3c2440/common.h
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index ad2eba40e319..ea5dd289fe2a 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -296,6 +296,8 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, unsigned offset; unsigned num_bvecs; sector_t remaining = where->count; + struct request_queue *q = bdev_get_queue(where->bdev); + sector_t discard_sectors; /* * where->count may be zero if rw holds a flush and we need to @@ -305,9 +307,12 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, /* * Allocate a suitably sized-bio. */ - num_bvecs = dm_sector_div_up(remaining, - (PAGE_SIZE >> SECTOR_SHIFT)); - num_bvecs = min_t(int, bio_get_nr_vecs(where->bdev), num_bvecs); + if (rw & REQ_DISCARD) + num_bvecs = 1; + else + num_bvecs = min_t(int, bio_get_nr_vecs(where->bdev), + dm_sector_div_up(remaining, (PAGE_SIZE >> SECTOR_SHIFT))); + bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios); bio->bi_sector = where->sector + (where->count - remaining); bio->bi_bdev = where->bdev; @@ -315,10 +320,14 @@ static void do_region(int rw, unsigned region, struct dm_io_region *where, bio->bi_destructor = dm_bio_destructor; store_io_and_region_in_bio(bio, io, region); - /* - * Try and add as many pages as possible. - */ - while (remaining) { + if (rw & REQ_DISCARD) { + discard_sectors = min_t(sector_t, q->limits.max_discard_sectors, remaining); + bio->bi_size = discard_sectors << SECTOR_SHIFT; + remaining -= discard_sectors; + } else while (remaining) { + /* + * Try and add as many pages as possible. + */ dp->get_page(dp, &page, &len, &offset); len = min(len, to_bytes(remaining)); if (!bio_add_page(bio, page, len, offset)) |