From 1c88f8ff4290fd348de1cf27d403e0fc86474007 Mon Sep 17 00:00:00 2001 From: Christian Gromm <christian.gromm@microchip.com> Date: Mon, 13 Jun 2016 16:24:25 +0200 Subject: [PATCH] staging: most: dim2-hdm: fix possible kernel freeze when reusing a dim2 channel If a DIM2 channel is being closed while it is busy, the channels's status flag could possibly stay active for this very channel. This causes the kernel to freeze by the time the channel is opened again. This patch fixes the problem. Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de> Signed-off-by: Christian Gromm <christian.gromm@microchip.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/staging/most/hdm-dim2/dim2_hal.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.c b/drivers/staging/most/hdm-dim2/dim2_hal.c index 8783dbbdafdc2..a0b935c726718 100644 --- a/drivers/staging/most/hdm-dim2/dim2_hal.c +++ b/drivers/staging/most/hdm-dim2/dim2_hal.c @@ -342,6 +342,9 @@ static void dim2_clear_channel(u8 ch_addr) dim2_clear_cat(MLB_CAT, ch_addr); dim2_clear_cdt(ch_addr); + + /* clear channel status bit */ + dimcb_io_write(&g.dim2->ACSR0, bit_mask(ch_addr)); } /* -------------------------------------------------------------------------- */ -- 2.30.2