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
---
drivers/mmc/mmc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 255310a..31614dd 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;