soc: fsl: cpm1: qmc: Fix rx channel reset
authorHerve Codina <herve.codina@bootlin.com>
Tue, 5 Dec 2023 15:21:00 +0000 (16:21 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 1 Feb 2024 00:18:51 +0000 (16:18 -0800)
commit075c01f60bee12927ee1116f7e31275dfd1484d0
tree33d25a69ba42e0f869483252998d032112192e9c
parent07d45e91252152a7b0db3a2ca164ad1663fe55d7
soc: fsl: cpm1: qmc: Fix rx channel reset

commit dfe66d012af2ddfa566cf9c860b8472b412fb7e4 upstream.

The qmc_chan_reset_rx() set the is_rx_stopped flag. This leads to an
inconsistent state in the following sequence.
    qmc_chan_stop()
    qmc_chan_reset()
Indeed, after the qmc_chan_reset() call, the channel must still be
stopped. Only a qmc_chan_start() call can move the channel from stopped
state to started state.

Fix the issue removing the is_rx_stopped flag setting from
qmc_chan_reset()

Fixes: 3178d58e0b97 ("soc: fsl: cpm1: Add support for QMC")
Cc: stable@vger.kernel.org
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20231205152116.122512-4-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/soc/fsl/qe/qmc.c