6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Herve Codina <herve.codina@xxxxxxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Herve Codina <herve.codina@xxxxxxxxxxx>
Reviewed-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231205152116.122512-4-herve.codina@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/soc/fsl/qe/qmc.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
index 3f3de1351c96..2312152a44b3 100644
--- a/drivers/soc/fsl/qe/qmc.c
+++ b/drivers/soc/fsl/qe/qmc.c
@@ -685,7 +685,6 @@ static void qmc_chan_reset_rx(struct qmc_chan *chan)
qmc_read16(chan->s_param + QMC_SPE_RBASE));
chan->rx_pending = 0;
- chan->is_rx_stopped = false;
spin_unlock_irqrestore(&chan->rx_lock, flags);
}
--
2.43.0
