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staging: most: dim2-hdm: fix possible kernel freeze when reusing a dim2 channel

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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>
This commit is contained in:
Christian Gromm 2016-06-13 16:24:25 +02:00 committed by Greg Kroah-Hartman
parent 63c87669c4
commit 1c88f8ff42
1 changed files with 3 additions and 0 deletions
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3
drivers/staging/most/hdm-dim2/dim2_hal.c
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@ -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));
}
/* -------------------------------------------------------------------------- */