This is a note to let you know that I've just added the patch titled
dmaengine: dma-jz4780: Also break descriptor chains on JZ4725B
to the 5.4-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:
dmaengine-dma-jz4780-also-break-descriptor-chains-on-jz4725b.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a40c94be2336f3002563c9ae16572143ae3422e2 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Date: Tue, 10 Dec 2019 17:55:45 +0100
Subject: dmaengine: dma-jz4780: Also break descriptor chains on JZ4725B
From: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
commit a40c94be2336f3002563c9ae16572143ae3422e2 upstream.
It turns out that the JZ4725B displays the same buggy behaviour as the
JZ4740 that was described in commit f4c255f1a747 ("dmaengine: dma-jz4780:
Break descriptor chains on JZ4740").
Work around it by using the same workaround previously used for the
JZ4740.
Fixes commit f4c255f1a747 ("dmaengine: dma-jz4780: Break descriptor
chains on JZ4740")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20191210165545.59690-1-paul@xxxxxxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/dma/dma-jz4780.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -1004,7 +1004,8 @@ static const struct jz4780_dma_soc_data
static const struct jz4780_dma_soc_data jz4725b_dma_soc_data = {
.nb_channels = 6,
.transfer_ord_max = 5,
- .flags = JZ_SOC_DATA_PER_CHAN_PM | JZ_SOC_DATA_NO_DCKES_DCKEC,
+ .flags = JZ_SOC_DATA_PER_CHAN_PM | JZ_SOC_DATA_NO_DCKES_DCKEC |
+ JZ_SOC_DATA_BREAK_LINKS,
};
static const struct jz4780_dma_soc_data jz4770_dma_soc_data = {
Patches currently in stable-queue which might be from paul@xxxxxxxxxxxxxxx are
queue-5.4/dmaengine-dma-jz4780-also-break-descriptor-chains-on-jz4725b.patch
