* Kim Kyuwon <chammoru@xxxxxxxxx> [090131 00:22]:
> USB should be suspended with interrupt disabled[1]. If USB is suspended with
> interrupt enabled and connected to host PC, a kernel panic would occur When
> it wakes up. Because, after the arch_suspend_enable_irqs() function is called
> in the suspend_enter() function, USB Interrupt handler is called, even though
> USB controller is still not resumed! All devices are resumed after the
> device_resume() is called.
Please send the usb patches to the linux-usb@xxxxxxxxxxxxxxx list
with linux-omap list Cc'd.
Regards,
Tony
> [1] /Documentation/power/devices.txt: 412 line
>
> Signed-off-by: Kim Kyuwon <chammoru@xxxxxxxxx>
> ---
> drivers/usb/musb/musb_core.c | 4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index 2cc34fa..0dfe15e 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -2151,6 +2151,8 @@ static int musb_suspend(struct platform_device
> *pdev, pm_message_t message)
>
> spin_lock_irqsave(&musb->lock, flags);
>
> + disable_irq(musb->nIrq);
> +
> if (is_peripheral_active(musb)) {
> /* FIXME force disconnect unless we know USB will wake
> * the system up quickly enough to respond ...
> @@ -2184,6 +2186,8 @@ static int musb_resume(struct platform_device *pdev)
> else
> clk_enable(musb->clock);
>
> + enable_irq(musb->nIrq);
> +
> /* for static cmos like DaVinci, register values were preserved
> * unless for some reason the whole soc powered down and we're
> * not treating that as a whole-system restart (e.g. swsusp)
> --
> Kim Kyuwon
> --
> To unsubscribe from this list: send the line "unsubscribe linux-omap" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
