diff options
| author | Wolfgang Muees <wolfgang.mues@auerswald.de> | 2010-03-05 22:43:42 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 20:26:43 +0100 |
| commit | 9af13be2acac60ca5593e41a601d4a5b6bc35302 (patch) | |
| tree | 5f73ff3f0a4dfbed2dc87e171d78df612f2b227d /drivers/mmc | |
| parent | mmc: at91_mci: use DMA buffer for read (diff) | |
| download | linux-9af13be2acac60ca5593e41a601d4a5b6bc35302.tar.xz linux-9af13be2acac60ca5593e41a601d4a5b6bc35302.zip | |
mmc: at91_mci: enable large data blocks
This patch is setting some max_ variables for the IO elevator, so the
elevator will put requests for large data blocks to the driver. This is
critical for
a) speed
and
b) wear leveling of the flash chip controller: Otherwise the controller
will treat the SD card badly with millions of single 4 KByte write
commands. This will lead to a shorter life time for the SD cards.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Andrew Victor <avictor.za@gmail.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/at91_mci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c index 818b4e75708a..3cd00c6f2584 100644 --- a/drivers/mmc/host/at91_mci.c +++ b/drivers/mmc/host/at91_mci.c @@ -934,6 +934,9 @@ static int __init at91_mci_probe(struct platform_device *pdev) mmc->max_blk_size = MCI_MAXBLKSIZE; mmc->max_blk_count = MCI_BLKATONCE; mmc->max_req_size = MCI_BUFSIZE; + mmc->max_phys_segs = MCI_BLKATONCE; + mmc->max_hw_segs = MCI_BLKATONCE; + mmc->max_seg_size = MCI_BUFSIZE; host = mmc_priv(mmc); host->mmc = mmc; |