FAILED: Patch "net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()" failed to apply to 6.1-stable tree
From: Sasha Levin <sashal@kernel.org>
Date: 2026-03-01 01:47:16
Also in:
netdev, stable
Subsystem:
freescale quicc engine ucc hdlc driver, networking drivers, the rest · Maintainers:
Zhao Qiang, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to [off-list ref].
Thanks,
Sasha
------------------ original commit in Linus's tree ------------------
From 36bd7d5deef936c4e1e3cd341598140e5c14c1d3 Mon Sep 17 00:00:00 2001
From: Thomas Fourier <redacted>
Date: Fri, 6 Feb 2026 09:53:33 +0100
Subject: [PATCH] net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in
uhdlc_memclean()
The priv->rx_buffer and priv->tx_buffer are alloc'd together as
contiguous buffers in uhdlc_init() but freed as two buffers in
uhdlc_memclean().
Change the cleanup to only call dma_free_coherent() once on the whole
buffer.
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Fixes: c19b6d246a35 ("drivers/net: support hdlc function for QE-UCC")
Cc: <redacted>
Signed-off-by: Thomas Fourier <redacted>
Link: https://patch.msgid.link/20260206085334.21195-2-fourier.thomas@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
drivers/net/wan/fsl_ucc_hdlc.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
index f999798a56127..dff84731343cc 100644
--- a/drivers/net/wan/fsl_ucc_hdlc.c
+++ b/drivers/net/wan/fsl_ucc_hdlc.c@@ -790,18 +790,14 @@ static void uhdlc_memclean(struct ucc_hdlc_private *priv) if (priv->rx_buffer) { dma_free_coherent(priv->dev, - RX_BD_RING_LEN * MAX_RX_BUF_LENGTH, + (RX_BD_RING_LEN + TX_BD_RING_LEN) * MAX_RX_BUF_LENGTH, priv->rx_buffer, priv->dma_rx_addr); priv->rx_buffer = NULL; priv->dma_rx_addr = 0; - } - if (priv->tx_buffer) { - dma_free_coherent(priv->dev, - TX_BD_RING_LEN * MAX_RX_BUF_LENGTH, - priv->tx_buffer, priv->dma_tx_addr); priv->tx_buffer = NULL; priv->dma_tx_addr = 0; + } }
--
2.51.0