Hi Kevin, Tarun,
We are using the expansion connector A on Panda board to mount a SDIO
WiFi dongle on MMC2 with a level triggered interrupt signal connected to
GPIO 138. It's been working fine until 3.5 rc1. The board hang randomly
within 5 mins during a network traffic test. After bisecting we found
the culprit is "[PATCH 8/8] gpio/omap: fix missing check in
*_runtime_suspend()" [1].
I noticed Kevin raised some similar cases on other platforms and also
provided two patches in the patch mail thread. But unfortunately those
two patches doesn't help in our case. I tested the driver with 3.5-rc3
mainline kernel and the issue is still there. I can only "fix" the hang
by either reverting the commit or disabling CONFIG_PM_RUNTIME. Also, the
hang only happens on Panda ES board. Old Panda with 4430 works good.
Any thoughts and suggestions?
Thanks,
Franky
[1] http://article.gmane.org/gmane.linux.ports.arm.omap/75708/
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