From d2d8afae338664958b0ab68741419c0f8be26e80 Mon Sep 17 00:00:00 2001 From: Jerry Huang Date: Thu, 17 May 2012 23:00:51 +0000 Subject: SD/MMC: check the card status during erase operation Use the function 'mmc_send_status' to check the card status. only when the card is ready, driver can send the next erase command to the card, otherwise, the erase will failed: => mmc erase 0 1 MMC erase: dev # 0, block # 0, count 1 ... 1 blocks erase: OK => mmc erase 0 2 MMC erase: dev # 0, block # 0, count 2 ... mmc erase failed 1 blocks erase: ERROR => mmc erase 0 4 MMC erase: dev # 0, block # 0, count 4 ... mmc erase failed 1 blocks erase: ERROR Signed-off-by: Jerry Huang CC: Andy Fleming CC: Marek Vasut Signed-off-by: Andy Fleming --- drivers/mmc/mmc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 98e5af3..c1c2862 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -333,6 +333,7 @@ mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt) int err = 0; struct mmc *mmc = find_mmc_device(dev_num); lbaint_t blk = 0, blk_r = 0; + int timeout = 1000; if (!mmc) return -1; @@ -352,6 +353,10 @@ mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt) break; blk += blk_r; + + /* Waiting for the ready status */ + if (mmc_send_status(mmc, timeout)) + return 0; } return blk; -- cgit v1.1