On Fri, 14 Feb 2020, Jani Nikula <jani.nikula@xxxxxxxxx> wrote:
> Split intel_modeset_driver_remove() to two, the part with working irqs
> before irq uninstall, and the part after irq uninstall. Move
> irq_unintall() closer to the layer it belongs.
>
> The error path in i915_driver_modeset_probe() looks obviously weird
> after this, but remains as good or broken as it ever was. No functional
> changes.
>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Pushed both, thanks again for review.
BR,
Jani.
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 12 +++++-------
> drivers/gpu/drm/i915/display/intel_display.h | 1 +
> drivers/gpu/drm/i915/i915_drv.c | 5 +++++
> 3 files changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index e09d3c93c52b..d9c1c952a27d 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -18898,6 +18898,7 @@ static void intel_hpd_poll_fini(struct drm_i915_private *i915)
> drm_connector_list_iter_end(&conn_iter);
> }
>
> +/* part #1: call before irq uninstall */
> void intel_modeset_driver_remove(struct drm_i915_private *i915)
> {
> flush_workqueue(i915->flip_wq);
> @@ -18905,14 +18906,11 @@ void intel_modeset_driver_remove(struct drm_i915_private *i915)
>
> flush_work(&i915->atomic_helper.free_work);
> WARN_ON(!llist_empty(&i915->atomic_helper.free_list));
> +}
>
> - /*
> - * Interrupts and polling as the first thing to avoid creating havoc.
> - * Too much stuff here (turning of connectors, ...) would
> - * experience fancy races otherwise.
> - */
> - intel_irq_uninstall(i915);
> -
> +/* part #2: call after irq uninstall */
> +void intel_modeset_driver_remove_noirq(struct drm_i915_private *i915)
> +{
> /*
> * Due to the hpd irq storm handling the hotplug work can re-arm the
> * poll handlers. Hence disable polling after hpd handling is shut down.
> diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
> index 75438a136d58..f92efbbec838 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.h
> +++ b/drivers/gpu/drm/i915/display/intel_display.h
> @@ -616,6 +616,7 @@ intel_format_info_is_yuv_semiplanar(const struct drm_format_info *info,
> void intel_modeset_init_hw(struct drm_i915_private *i915);
> int intel_modeset_init(struct drm_i915_private *i915);
> void intel_modeset_driver_remove(struct drm_i915_private *i915);
> +void intel_modeset_driver_remove_noirq(struct drm_i915_private *i915);
> void intel_display_resume(struct drm_device *dev);
> void intel_init_pch_refclk(struct drm_i915_private *dev_priv);
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 955f52bcd6a2..4636d723d531 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -333,6 +333,9 @@ static int i915_driver_modeset_probe(struct drm_i915_private *i915)
> i915_gem_driver_release(i915);
> cleanup_modeset:
> intel_modeset_driver_remove(i915);
> + intel_irq_uninstall(i915);
> + intel_modeset_driver_remove_noirq(i915);
> + goto cleanup_csr;
> cleanup_irq:
> intel_irq_uninstall(i915);
> cleanup_csr:
> @@ -349,6 +352,8 @@ static void i915_driver_modeset_remove(struct drm_i915_private *i915)
>
> intel_irq_uninstall(i915);
>
> + intel_modeset_driver_remove_noirq(i915);
> +
> intel_bios_driver_remove(i915);
>
> intel_vga_unregister(i915);
--
Jani Nikula, Intel Open Source Graphics Center
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