diff options
| author | Jean-Jacques Hiblot | 2018-02-09 12:09:27 +0100 |
|---|---|---|
| committer | Jaehoon Chung | 2018-02-19 16:59:21 +0900 |
| commit | a0276f3eeed539cbc5ecba694030519dcd1fe308 (patch) | |
| tree | 7e111a98370c6852c70608440836b38f9939e710 | |
| parent | 127a6011eead5fb7fbb9c62826034892591bc712 (diff) | |
mmc: Fix bug in sd_set_card_speed()
After settings the speed of the sd with the switch command, a check is
done to make sure that the new speed has been set. The current check has a
masking error: speed are encoded on 4 bits only.
Fix it by masking the upper bits.
This fixes a problem seen with QEmu emulating a vexpress-a15.
Reported-by: Jonathan Gray <jsg@jsg.id.au>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Tested-by: Jonathan Gray <jsg@jsg.id.au>
| -rw-r--r-- | drivers/mmc/mmc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 3a2e3b353fe..b46e3f60242 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1333,7 +1333,7 @@ static int sd_set_card_speed(struct mmc *mmc, enum bus_mode mode) if (err) return err; - if ((__be32_to_cpu(switch_status[4]) >> 24) != speed) + if (((__be32_to_cpu(switch_status[4]) >> 24) & 0xF) != speed) return -ENOTSUPP; return 0; |