https://github.com/torvalds/linux
Revision 3cfc183052c3dbf8eae57b6c1685dab00ed3db4a authored by Marek Vasut on 16 October 2021, 21:04:46 UTC, committed by Maarten Lankhorst on 21 October 2021, 09:08:08 UTC
The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference. Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ. Fixes: ae1ed00932819 ("drm: mxsfb: Stop using DRM simple display pipeline helper") Signed-off-by: Marek Vasut <marex@denx.de> Cc: Daniel Abrecht <public@danielabrecht.ch> Cc: Emil Velikov <emil.l.velikov@gmail.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stefan Agner <stefan@agner.ch> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20211016210446.171616-1-marex@denx.de Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
1 parent 519d819
Tip revision: 3cfc183052c3dbf8eae57b6c1685dab00ed3db4a authored by Marek Vasut on 16 October 2021, 21:04:46 UTC
drm: mxsfb: Fix NULL pointer dereference crash on unload
drm: mxsfb: Fix NULL pointer dereference crash on unload
Tip revision: 3cfc183
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