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| author | Tero Kristo <tero.kristo@nokia.com> | 2009-03-05 15:32:23 +0100 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-08-05 18:10:53 +0200 |
| commit | 2466211e5debd205fc550d871fe0ab9b9a6d02ed (patch) | |
| tree | c4c0c9e44a9a36c3695bf1c13444093263df2a81 /arch/arm/mach-omap2/serial.c | |
| parent | OMAP4: UART: cleanup special case IRQ handling (diff) | |
| download | linux-2466211e5debd205fc550d871fe0ab9b9a6d02ed.tar.xz linux-2466211e5debd205fc550d871fe0ab9b9a6d02ed.zip | |
OMAP3: Fixed crash bug with serial + suspend
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>
Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
| -rw-r--r-- | arch/arm/mach-omap2/serial.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index c82ec95cd79e..5352d05b42d6 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -435,6 +435,20 @@ static void omap_uart_idle_init(struct omap_uart_state *uart) WARN_ON(ret); } +void omap_uart_enable_irqs(int enable) +{ + int ret; + struct omap_uart_state *uart; + + list_for_each_entry(uart, &uart_list, node) { + if (enable) + ret = request_irq(uart->p->irq, omap_uart_interrupt, + IRQF_SHARED, "serial idle", (void *)uart); + else + free_irq(uart->p->irq, (void *)uart); + } +} + static ssize_t sleep_timeout_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) |