[PATCH 3/4] ARM: at91: fix infinite loop in at91_irq_suspend/resume
Nicolas Ferre
nicolas.ferre at atmel.com
Wed Mar 13 05:21:06 EDT 2013
On 03/08/2013 04:58 PM, Jean-Christophe PLAGNIOL-VILLARD :
> On 16:13 Fri 08 Mar , ludovic.desroches at atmel.com wrote:
>> From: Ludovic Desroches <ludovic.desroches at atmel.com>
>>
>> Fix an infinite loop when suspending or resuming a device with AIC5 i.e. SAMA5
>> devices.
>>
>> Signed-off-by: Ludovic Desroches <ludovic.desroches at atmel.com>
> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
I think that we can queue this one for "fixes".
I integrated it in at91-3.9-fixes branch. It means that you can drop
this one from your patch series.
Thanks, best regards.
>
> Best Regards,
> J.
>> ---
>> arch/arm/mach-at91/irq.c | 20 ++++++++------------
>> 1 file changed, 8 insertions(+), 12 deletions(-)
>>
>> diff --git a/arch/arm/mach-at91/irq.c b/arch/arm/mach-at91/irq.c
>> index 8e21026..e0ca591 100644
>> --- a/arch/arm/mach-at91/irq.c
>> +++ b/arch/arm/mach-at91/irq.c
>> @@ -92,23 +92,21 @@ static int at91_aic_set_wake(struct irq_data *d, unsigned value)
>>
>> void at91_irq_suspend(void)
>> {
>> - int i = 0, bit;
>> + int bit = -1;
>>
>> if (has_aic5()) {
>> /* disable enabled irqs */
>> - while ((bit = find_next_bit(backups, n_irqs, i)) < n_irqs) {
>> + while ((bit = find_next_bit(backups, n_irqs, bit + 1)) < n_irqs) {
>> at91_aic_write(AT91_AIC5_SSR,
>> bit & AT91_AIC5_INTSEL_MSK);
>> at91_aic_write(AT91_AIC5_IDCR, 1);
>> - i = bit;
>> }
>> /* enable wakeup irqs */
>> - i = 0;
>> - while ((bit = find_next_bit(wakeups, n_irqs, i)) < n_irqs) {
>> + bit = -1;
>> + while ((bit = find_next_bit(wakeups, n_irqs, bit + 1)) < n_irqs) {
>> at91_aic_write(AT91_AIC5_SSR,
>> bit & AT91_AIC5_INTSEL_MSK);
>> at91_aic_write(AT91_AIC5_IECR, 1);
>> - i = bit;
>> }
>> } else {
>> at91_aic_write(AT91_AIC_IDCR, *backups);
>> @@ -118,23 +116,21 @@ void at91_irq_suspend(void)
>>
>> void at91_irq_resume(void)
>> {
>> - int i = 0, bit;
>> + int bit = -1;
>>
>> if (has_aic5()) {
>> /* disable wakeup irqs */
>> - while ((bit = find_next_bit(wakeups, n_irqs, i)) < n_irqs) {
>> + while ((bit = find_next_bit(wakeups, n_irqs, bit + 1)) < n_irqs) {
>> at91_aic_write(AT91_AIC5_SSR,
>> bit & AT91_AIC5_INTSEL_MSK);
>> at91_aic_write(AT91_AIC5_IDCR, 1);
>> - i = bit;
>> }
>> /* enable irqs disabled for suspend */
>> - i = 0;
>> - while ((bit = find_next_bit(backups, n_irqs, i)) < n_irqs) {
>> + bit = -1;
>> + while ((bit = find_next_bit(backups, n_irqs, bit + 1)) < n_irqs) {
>> at91_aic_write(AT91_AIC5_SSR,
>> bit & AT91_AIC5_INTSEL_MSK);
>> at91_aic_write(AT91_AIC5_IECR, 1);
>> - i = bit;
>> }
>> } else {
>> at91_aic_write(AT91_AIC_IDCR, *wakeups);
>> --
>> 1.7.11.3
>>
>
>
--
Nicolas Ferre
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