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[v4,03/28] soc: fsl: cpm1: qmc: Fix rx channel reset

Message ID 9abc0780ffd0a9044e6898ba215945d23b654e13.1692376360.git.christophe.leroy@csgroup.eu (mailing list archive)
State New, archived
Headers show
Series Add support for QMC HDLC, framer infrastruture and PEF2256 framer (v4) | expand

Commit Message

Christophe Leroy Aug. 18, 2023, 4:38 p.m. UTC 
From: Herve Codina <herve.codina@bootlin.com>

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")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 drivers/soc/fsl/qe/qmc.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
index 7ad0d77f1740..8dc73cc1a83b 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);
 }