* [PATCH] drm/i915/display: Add check for alloc_ordered_workqueue() and alloc_workqueue()
@ 2025-02-19 13:08 Haoxiang Li
2025-02-19 15:26 ` Jani Nikula
0 siblings, 1 reply; 2+ messages in thread
From: Haoxiang Li @ 2025-02-19 13:08 UTC (permalink / raw)
To: jani.nikula, rodrigo.vivi, joonas.lahtinen, tursulin, airlied,
simona, gustavo.sousa
Cc: intel-gfx, intel-xe, dri-devel, linux-kernel, Haoxiang Li, stable
Add check for the return value of alloc_ordered_workqueue()
and alloc_workqueue() to catch potential exception.
Fixes: 40053823baad ("drm/i915/display: move modeset probe/remove functions to intel_display_driver.c")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
---
drivers/gpu/drm/i915/display/intel_display_driver.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
index 50ec0c3c7588..dfe5b779aefd 100644
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c
+++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
@@ -245,6 +245,11 @@ int intel_display_driver_probe_noirq(struct intel_display *display)
WQ_UNBOUND, WQ_UNBOUND_MAX_ACTIVE);
display->wq.cleanup = alloc_workqueue("i915_cleanup", WQ_HIGHPRI, 0);
+ if (!display->wq.modeset || !display->wq.flip || !display->wq.cleanup) {
+ ret = -ENOMEM;
+ goto cleanup_vga_client_pw_domain_dmc;
+ }
+
intel_mode_config_init(display);
ret = intel_cdclk_init(display);
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/i915/display: Add check for alloc_ordered_workqueue() and alloc_workqueue()
2025-02-19 13:08 [PATCH] drm/i915/display: Add check for alloc_ordered_workqueue() and alloc_workqueue() Haoxiang Li
@ 2025-02-19 15:26 ` Jani Nikula
0 siblings, 0 replies; 2+ messages in thread
From: Jani Nikula @ 2025-02-19 15:26 UTC (permalink / raw)
To: Haoxiang Li, rodrigo.vivi, joonas.lahtinen, tursulin, airlied,
simona, gustavo.sousa
Cc: intel-gfx, intel-xe, dri-devel, linux-kernel, Haoxiang Li, stable
On Wed, 19 Feb 2025, Haoxiang Li <haoxiang_li2024@163.com> wrote:
> Add check for the return value of alloc_ordered_workqueue()
> and alloc_workqueue() to catch potential exception.
>
> Fixes: 40053823baad ("drm/i915/display: move modeset probe/remove functions to intel_display_driver.c")
Not really. That's just code movement.
> Cc: stable@vger.kernel.org
> Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
> ---
> drivers/gpu/drm/i915/display/intel_display_driver.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
> index 50ec0c3c7588..dfe5b779aefd 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_driver.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
> @@ -245,6 +245,11 @@ int intel_display_driver_probe_noirq(struct intel_display *display)
> WQ_UNBOUND, WQ_UNBOUND_MAX_ACTIVE);
> display->wq.cleanup = alloc_workqueue("i915_cleanup", WQ_HIGHPRI, 0);
>
> + if (!display->wq.modeset || !display->wq.flip || !display->wq.cleanup) {
> + ret = -ENOMEM;
> + goto cleanup_vga_client_pw_domain_dmc;
> + }
> +
Yes, we should check these, but if some of them succeed and some fail,
we'll never destroy the workqueues whose allocation succeeded.
BR,
Jani.
> intel_mode_config_init(display);
>
> ret = intel_cdclk_init(display);
--
Jani Nikula, Intel
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