From 2bd6a935555b06622fa7f47a9c411b8a7812e4dc Mon Sep 17 00:00:00 2001 From: Arnd Hannemann Date: Wed, 29 Dec 2010 14:21:14 +0100 Subject: mmc: tmio_mmc: fix CMD irq handling With current code card insert/eject interrupts will acknowledge outstanding commands. Normally this seems to be no problem, however if the hardware gets stuck and no interrupts for CMD_TIMEOUT or CMD_RESPEND are generated, then inserting and ejecting cards will falsely acknowledge outstanding commands from the core. This patch changes the behavior so that CMDs are only acked, if CMD_TIMEOUT or CMD_RESPEND is received. Signed-off-by: Arnd Hannemann Signed-off-by: Chris Ball --- drivers/mmc/host/tmio_mmc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c index 689a3692242e..e3c6ef208391 100644 --- a/drivers/mmc/host/tmio_mmc.c +++ b/drivers/mmc/host/tmio_mmc.c @@ -727,8 +727,10 @@ static irqreturn_t tmio_mmc_irq(int irq, void *devid) */ /* Command completion */ - if (ireg & TMIO_MASK_CMD) { - ack_mmc_irqs(host, TMIO_MASK_CMD); + if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { + ack_mmc_irqs(host, + TMIO_STAT_CMDRESPEND | + TMIO_STAT_CMDTIMEOUT); tmio_mmc_cmd_irq(host, status); } -- cgit v1.2.2