Re: [PATCH] rtc: Fix missing IRQF_ONESHOT as only threaded handler

[Krzysztof Kozlowski]

On 16/04/2021 04:19, zhuguangqing83@xxxxxxxxx wrote:
> From: Guangqing Zhu <zhuguangqing83@xxxxxxxxx>
> 
> Coccinelle noticed:
> 1. drivers/rtc/rtc-s5m.c:810:7-32: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 2. drivers/rtc/rtc-rk808.c:441:7-32: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 3. drivers/rtc/rtc-max77686.c:779:7-27: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 4. drivers/rtc/rtc-tps65910.c:415:7-32: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 5. drivers/rtc/rtc-lp8788.c:277:8-33: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 6. drivers/rtc/rtc-max8998.c:283:7-32: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 7. drivers/rtc/rtc-rc5t583.c:241:7-32: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 8. drivers/rtc/rtc-max8997.c:495:7-32: ERROR: Threaded IRQ with no primary
>    handler requested without IRQF_ONESHOT
> 
> Signed-off-by: Guangqing Zhu <zhuguangqing83@xxxxxxxxx>
> ---
>  drivers/rtc/rtc-lp8788.c   | 2 +-
>  drivers/rtc/rtc-max77686.c | 4 ++--
>  drivers/rtc/rtc-max8997.c  | 2 +-
>  drivers/rtc/rtc-max8998.c  | 3 ++-
>  drivers/rtc/rtc-rc5t583.c  | 2 +-
>  drivers/rtc/rtc-rk808.c    | 2 +-
>  drivers/rtc/rtc-s5m.c      | 4 ++--

The commit msg suggests in misleading way that there is an issue here to
solve but at least for max* and s5m it is not true. These are nested
interrupts.

I tested *only* the S5M:
Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>

but still I wonder - why this change is needed, except satisfying blind
Coccinelle runs? Does it really bring benefit for the nested interrupts?


Best regards,
Krzysztof