From 9af13be2acac60ca5593e41a601d4a5b6bc35302 Mon Sep 17 00:00:00 2001 From: Wolfgang Muees <wolfgang.mues@auerswald.de> Date: Fri, 5 Mar 2010 13:43:42 -0800 Subject: [PATCH] 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> --- drivers/mmc/host/at91_mci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c index 818b4e75708afe..3cd00c6f258417 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; -- GitLab