This is a note to let you know that I've just added the patch titled
soc: fsl: cpm1: qmc: Fix rx channel reset
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
soc-fsl-cpm1-qmc-fix-rx-channel-reset.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From dfe66d012af2ddfa566cf9c860b8472b412fb7e4 Mon Sep 17 00:00:00 2001
From: Herve Codina <herve.codina@xxxxxxxxxxx>
Date: Tue, 5 Dec 2023 16:21:00 +0100
Subject: soc: fsl: cpm1: qmc: Fix rx channel reset
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(-)
--- 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
qmc_read16(chan->s_param + QMC_SPE_RBASE));
chan->rx_pending = 0;
- chan->is_rx_stopped = false;
spin_unlock_irqrestore(&chan->rx_lock, flags);
}
Patches currently in stable-queue which might be from herve.codina@xxxxxxxxxxx are
queue-6.7/soc-fsl-cpm1-qmc-fix-rx-channel-reset.patch
queue-6.7/soc-fsl-cpm1-qmc-fix-__iomem-addresses-declaration.patch
queue-6.7/soc-fsl-cpm1-tsa-fix-__iomem-addresses-declaration.patch
