Disable the CSI immediately after receiving the last EOF before stream off (and thus before disabling the IDMA channel). This fixes a complete system hard lockup on the SabreAuto when streaming from the ADV7180, by repeatedly sending a stream off immediately followed by stream on: while true; do v4l2-ctl -d4 --stream-mmap --stream-count=3; done Eventually this either causes the system lockup or EOF timeouts at all subsequent stream on, until a system reset. The lockup occurs when disabling the IDMA channel at stream off. Disabling the CSI before disabling the IDMA channel appears to be a reliable fix for the hard lockup. History: v2: - Whitespace fixes - Add Fixes: and Cc: stable@xxxxxxxxxxxxxxx - No functional changes. Steve Longerbeam (2): media: imx: csi: Disable CSI immediately after last EOF media: imx: prpencvf: Disable CSI immediately after last EOF drivers/staging/media/imx/imx-ic-prpencvf.c | 26 ++++++++++++++------- drivers/staging/media/imx/imx-media-csi.c | 6 +++-- 2 files changed, 21 insertions(+), 11 deletions(-) -- 2.17.1
