Xiaomeng Tong 2037d8cf8c stm: ltdc: fix two incorrect NULL checks on list iterator ... commit 2e6c86be0e upstream. The two bugs are here: if (encoder) { if (bridge && bridge->timings) The list iterator value 'encoder/bridge' will *always* be set and non-NULL by drm_for_each_encoder()/list_for_each_entry(), so it is incorrect to assume that the iterator value will be NULL if the list is empty or no element is found. To fix the bug, use a new variable '*_iter' as the list iterator, while use the old variable 'encoder/bridge' as a dedicated pointer to point to the found element. Cc: stable@vger.kernel.org Fixes: 99e360442f ("drm/stm: Fix bus_flags handling") Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com> Acked-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com> Signed-off-by: Philippe Cornu <philippe.cornu@foss.st.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220327055355.3808-1-xiam0nd.tong@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-06-09 10:23:28 +02:00
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Kconfig	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
drv.c	drm/<drivers>: Constify struct drm_driver	2020-11-06 10:31:26 +01:00
dw_mipi_dsi-stm.c	drm/stm: dsi: compute the transition time from LP to HS and back	2021-07-19 15:35:55 +02:00
ltdc.c	stm: ltdc: fix two incorrect NULL checks on list iterator	2022-06-09 10:23:28 +02:00
ltdc.h	drm/stm: Convert to struct drm_crtc_helper_funcs.get_scanout_position()	2020-02-13 13:09:22 +01:00