This drastically reduces the rate at which the MMC_SEND_STATUS cmd polls for completion of the MMC Erase operation. On my embedded ARM platform the interrupt rates drop from ~45000/s to ~1000/s, which prevents the system from being very sluggish to respond during Erase operations. Signed-off-by: Martin Hicks <mort@xxxxxxxx> --- drivers/mmc/core/core.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index db1bf63..5e37276 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2284,8 +2284,14 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from, goto out; } - } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || - (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG)); + if ((cmd.resp[0] & R1_READY_FOR_DATA) && + R1_CURRENT_STATE(cmd.resp[0]) != R1_STATE_PRG) + break; + + /* Throttle the calls to MMC_SEND_STATUS */ + usleep_range(1000, 2000); + } while (1); + out: mmc_retune_release(card->host); return err; -- 1.9.1 -- Martin Hicks P.Eng. | mort@xxxxxxxx Bork Consulting Inc. | +1 (613) 266-2296 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
