From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Genoud Date: Fri, 31 May 2013 14:28:39 +0000 Subject: [PATCH 2/2] atmel_lcdfb: blank the backlight on remove Message-Id: <1370010519-18691-2-git-send-email-richard.genoud@gmail.com> List-Id: References: <1370010519-18691-1-git-send-email-richard.genoud@gmail.com> In-Reply-To: <1370010519-18691-1-git-send-email-richard.genoud@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Nicolas Ferre Cc: Jean-Christophe Plagniol-Villard , Tomi Valkeinen , linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Genoud When removing atmel_lcdfb module, the backlight is unregistered but not blanked. (only for CONFIG_BACKLIGHT_ATMEL_LCDC case). This can result in the screen going full white depending on how the PWM is wired. Signed-off-by: Richard Genoud --- drivers/video/atmel_lcdfb.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c index 6e6491f..e00318f 100644 --- a/drivers/video/atmel_lcdfb.c +++ b/drivers/video/atmel_lcdfb.c @@ -223,8 +223,13 @@ static void init_backlight(struct atmel_lcdfb_info *sinfo) static void exit_backlight(struct atmel_lcdfb_info *sinfo) { - if (sinfo->backlight) + if (sinfo->backlight) { + if (sinfo->backlight->ops) { + sinfo->backlight->props.power = FB_BLANK_POWERDOWN; + sinfo->backlight->ops->update_status(sinfo->backlight); + } backlight_device_unregister(sinfo->backlight); + } } #else -- 1.7.10.4