From 6dc93e7087ccac1acb6910ac8838d9e90c602fe4 Mon Sep 17 00:00:00 2001 From: Peter Bigot Date: Tue, 2 Sep 2014 18:31:23 -0500 Subject: [PATCH] mmc: restore capacity when switching to partition 0 The capacity and lba for an MMC device with part_num 0 reflects the whole device. When mmc_switch_part() successfully switches to a partition, the capacity is changed to that partition. As partition 0 does not physically exist, attempts to switch back to the whole device will indicate an error, but the capacity setting for the whole device must still be restored to match the partition. Signed-off-by: Peter A. Bigot Tested-by: Tom Rini Acked-by: Pantelis Antoniou --- drivers/mmc/mmc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 52a8e36312..e4a28d4b4a 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -594,10 +594,15 @@ int mmc_switch_part(int dev_num, unsigned int part_num) ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, (mmc->part_config & ~PART_ACCESS_MASK) | (part_num & PART_ACCESS_MASK)); - if (ret) - return ret; - return mmc_set_capacity(mmc, part_num); + /* + * Set the capacity if the switch succeeded or was intended + * to return to representing the raw device. + */ + if ((ret == 0) || ((ret == -ENODEV) && (part_num == 0))) + ret = mmc_set_capacity(mmc, part_num); + + return ret; } int mmc_getcd(struct mmc *mmc) -- 2.30.2