Excerpts from Chuanxiao Dong's message of Sat Feb 12 07:22:20 +0100 2011: > SDHCI host controller has TRIM/ERASE capability, enable these caps for erasing > purpose. > > ERASE command needs R1B response. So for such command with busy signal, before > sending command, SDHCI host driver will simply set a maximum value for timeout > control register which is safe to use. > > Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx> Tested-By: Sascha Silbe <sascha-pgp@xxxxxxxxx> Tested on an OLPC XO-1 using a SanDisk 4GB class 4 card (retail). The BLKDISCARD ioctl (range 0..card size) returned immediately, no timeout issue encountered. Sascha -- http://sascha.silbe.org/ http://www.infra-silbe.de/
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