On Fri, Apr 25, 2025 at 11:11:07PM +0800, Junxiao Chang wrote:
> MEI GSC interrupt comes from i915. It has top half and bottom half.
> Top half is called from i915 interrupt handler. It should be in
> irq disabled context.
>
> With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
MEI GSC interrupt comes from i915. It has top half and bottom half.
Top half is called from i915 interrupt handler. It should be in
irq disabled context.
With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
top half might be in threaded IRQ context. generic_handle_irq_safe API
c
On 2025-04-25 20:04:43 [+0800], Junxiao Chang wrote:
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -284,7 +284,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned
> int intf_id)
> if (gt->gsc.intf[intf_id].irq < 0)
> ret
MEI GSC interrupt comes from i915. It has top half and bottom half.
Top half is called from i915 interrupt handler. It should be in
irq disabled context.
With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
top half might be in threaded IRQ context. generic_handle_irq_safe API
c
On Fri, 25 Apr 2025, Jani Nikula wrote:
>On Fri, 25 Apr 2025, Junxiao Chang wrote:
>> MEI GSC interrupt comes from i915. It has top half and bottom half.
>>
>> -ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
>> +/* It can be called in both irq context and in thread context */
>
>Wha
On 2025-04-25 14:04:54 [+0800], Junxiao Chang wrote:
> MEI GSC interrupt comes from i915. It has top half and bottom half.
> Top half is called from i915 interrupt handler. It should be in
> irq disabled context.
>
> With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
> top hal
On Fri, 25 Apr 2025, Junxiao Chang wrote:
> MEI GSC interrupt comes from i915. It has top half and bottom half.
> Top half is called from i915 interrupt handler. It should be in
> irq disabled context.
>
> With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
> top half might be
MEI GSC interrupt comes from i915. It has top half and bottom half.
Top half is called from i915 interrupt handler. It should be in
irq disabled context.
With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
top half might be in threaded IRQ context. generic_handle_irq_safe API
c
On 2025-04-24 10:53:31 [+], Chang, Junxiao wrote:
> >> This should have a Fixes when generic_handle_irq() was introduced.
>
> If PREEMPT_RT is disabled, original driver works fine. I prefer to not
> add "Fixes:"?
PREEMPT_RT is mainline. It deserves the same fixes as other parts of the
kernel.
On Thu, 24 Apr 2025, Jani Nikula wrote:
>On Thu, 24 Apr 2025, Sebastian Andrzej Siewior
>wrote:
>> On 2025-04-24 14:56:08 [+0800], Junxiao Chang wrote:
>>> MEI GSC interrupt comes from i915. It has top half and bottom half.
>>> Top half is called from i915 interrupt handler. It should be in irq
>
On Thu, 24 Apr 2025, Sebastian Andrzej Siewior wrote:
> On 2025-04-24 14:56:08 [+0800], Junxiao Chang wrote:
>> MEI GSC interrupt comes from i915. It has top half and bottom half.
>> Top half is called from i915 interrupt handler. It should be in
>> irq disabled context.
>>
>> With RT kernel, by
On 2025-04-24 14:56:08 [+0800], Junxiao Chang wrote:
> MEI GSC interrupt comes from i915. It has top half and bottom half.
> Top half is called from i915 interrupt handler. It should be in
> irq disabled context.
>
> With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
> top hal
MEI GSC interrupt comes from i915. It has top half and bottom half.
Top half is called from i915 interrupt handler. It should be in
irq disabled context.
With RT kernel, by default i915 IRQ handler is in threaded IRQ. MEI GSC
top half might be in threaded IRQ context. In this case, local IRQ
shoul
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