From: Christian Gromm Date: Mon, 13 Jun 2016 14:24:25 +0000 (+0200) Subject: staging: most: dim2-hdm: fix possible kernel freeze when reusing a dim2 channel X-Git-Tag: v4.9-rc1~119^2~1173 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=1c88f8ff4290fd348de1cf27d403e0fc86474007;p=uclinux-h8%2Flinux.git 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 Signed-off-by: Christian Gromm Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.c b/drivers/staging/most/hdm-dim2/dim2_hal.c index 8783dbbdafdc..a0b935c72671 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)); } /* -------------------------------------------------------------------------- */