a8576690b3
If a histogram reader waits for completion in the do_histogram ioctl and during this time the device is suspended, the complete for this gets called from mdp_histogram_ctrl_all() in the panel_next_off() sequence. This results in mgmt->hist not set to NULL. The subsequent do_histogram ioctls after device resume fail due to multiple reader failure condition since the histogram irq will be enabled now from the same mdp_histogram_ctrl_all() during panel_next_on() sequence and this by-passes mgmt->hist getting set to NULL that is present in histogram_start() ioctl. Handle this scenario. Change-Id: Ib0485da24c0f09a3f26768b75231903c8a2e0033 Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>