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OMAP3: Fixed crash bug with serial + suspend

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It was possible for an unhandled interrupt to occur if there was incoming
serial traffic during wakeup from suspend. This was caused by the code
in arch-arm/mach-omap2/serial.c keeping interrupt enabled all the time,
but not acking its interrupts. Applies on top of PM branch.

Use the PM begin/end hooks to ensure that the "serial idle" interrupts
are disabled during the suspend path.  Also, since begin/end hooks are
now used, use the suspend_state that is passed in the begin hook instead
of the enter hook as per the platform_suspend_ops docs.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Tero Kristo
2009-03-05 16:32:23 +02:00
committed by Kevin Hilman
parent 4789998a30
commit 2466211e5d
3 changed files with 36 additions and 2 deletions
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arch/arm/plat-omap/include/mach/serial.h
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@@ -59,6 +59,7 @@ extern void omap_uart_check_wakeup(void);
extern void omap_uart_prepare_suspend(void);
extern void omap_uart_prepare_idle(int num);
extern void omap_uart_resume_idle(int num);
extern void omap_uart_enable_irqs(int enable);
#endif
#endif