From: Laurent Pinchart laurent.pinchart@ideasonboard.com

stable inclusion from stable-v4.19.317 commit b71348be1236398be2d04c5e145fd6eaae86a91b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAGEP0 CVE: CVE-2024-42087

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

--------------------------------

[ Upstream commit ee7860cd8b5763017f8dc785c2851fecb7a0c565 ]

The ilitek-ili9881c controls the reset GPIO using the non-sleeping gpiod_set_value() function. This complains loudly when the GPIO controller needs to sleep. As the caller can sleep, use gpiod_set_value_cansleep() to fix the issue.

Signed-off-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Link: https://lore.kernel.org/r/20240317154839.21260-1-laurent.pinchart@ideasonboa... Signed-off-by: Neil Armstrong neil.armstrong@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20240317154839.21260-1-laurent... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Liu Shixin liushixin2@huawei.com --- drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c index 3ad4a46c4e94..cc11cf41d392 100644 --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c @@ -307,10 +307,10 @@ static int ili9881c_prepare(struct drm_panel *panel) msleep(5);

/* And reset it */ - gpiod_set_value(ctx->reset, 1); + gpiod_set_value_cansleep(ctx->reset, 1); msleep(20);

- gpiod_set_value(ctx->reset, 0); + gpiod_set_value_cansleep(ctx->reset, 0); msleep(20);

for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) { @@ -367,7 +367,7 @@ static int ili9881c_unprepare(struct drm_panel *panel)

mipi_dsi_dcs_enter_sleep_mode(ctx->dsi); regulator_disable(ctx->power); - gpiod_set_value(ctx->reset, 1); + gpiod_set_value_cansleep(ctx->reset, 1);

return 0; }