mmc: sdio: avoid spurious calls to interrupt handlers
authorNicolas Pitre <nicolas.pitre@linaro.org>
Mon, 16 Apr 2012 23:16:54 +0000 (19:16 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 1 Jun 2012 07:18:26 +0000 (15:18 +0800)
commit11c8c735ebf68c754bdd94cebd307a96fcd95068
tree876678d7678658773f87ab0969b213d23ff4f98a
parente6b2a258ab83555e062cd2bc2a0ade31b8c118d1
mmc: sdio: avoid spurious calls to interrupt handlers

commit bbbc4c4d8c5face097d695f9bf3a39647ba6b7e7 upstream.

Commit 06e8935feb ("optimized SDIO IRQ handling for single irq")
introduced some spurious calls to SDIO function interrupt handlers,
such as when the SDIO IRQ thread is started, or the safety check
performed upon a system resume.  Let's add a flag to perform the
optimization only when a real interrupt is signaled by the host
driver and we know there is no point confirming it.

Reported-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/core/sdio.c
drivers/mmc/core/sdio_irq.c
include/linux/mmc/host.h