From: Wolfgang Muees Date: Fri, 5 Mar 2010 21:43:42 +0000 (-0800) Subject: mmc: at91_mci: enable large data blocks X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9af13be2acac60ca5593e41a601d4a5b6bc35302;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git 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 Signed-off-by: Nicolas Ferre Cc: Andrew Victor Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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;