From dd12ed17ce9e5523d30d2d6b8eac0bf52500b64f Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Fri, 18 Oct 2019 16:50:05 +0200 Subject: [PATCH] media: omap3isp: Don't restart CCDC if we're about to stop The omap3isp driver set the new buffer and enabled the CCDC in a situation a new buffer was available but streaming was about to be stopped on the CCDC. This lead to frequent system crashes in case there were buffers queued when streming was being stopped. Fix this by first checking whether there's an intent to stop streaming and if there isn't, then set the new buffer and re-enable CCDC. Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/omap3isp/ispccdc.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c index e2f336c715a4..471ae7cdb813 100644 --- a/drivers/media/platform/omap3isp/ispccdc.c +++ b/drivers/media/platform/omap3isp/ispccdc.c @@ -1607,6 +1607,11 @@ static int ccdc_isr_buffer(struct isp_ccdc_device *ccdc) return 0; } + /* Don't restart CCDC if we're just about to stop streaming. */ + if (ccdc->state == ISP_PIPELINE_STREAM_CONTINUOUS && + ccdc->stopping & CCDC_STOP_REQUEST) + return 0; + if (!ccdc_has_all_fields(ccdc)) return 1; @@ -1661,16 +1666,15 @@ static void ccdc_vd0_isr(struct isp_ccdc_device *ccdc) spin_unlock_irqrestore(&ccdc->lock, flags); } - if (ccdc->output & CCDC_OUTPUT_MEMORY) - restart = ccdc_isr_buffer(ccdc); - spin_lock_irqsave(&ccdc->lock, flags); - if (ccdc_handle_stopping(ccdc, CCDC_EVENT_VD0)) { spin_unlock_irqrestore(&ccdc->lock, flags); return; } + if (ccdc->output & CCDC_OUTPUT_MEMORY) + restart = ccdc_isr_buffer(ccdc); + if (!ccdc->shadow_update) ccdc_apply_controls(ccdc); spin_unlock_irqrestore(&ccdc->lock, flags); -- 2.11.0