This is a note to let you know that I've just added the patch titled
dmaengine: at_xdmac: Start transfer for cyclic channels in issue_pending
to the 5.10-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-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e6af9b05bec63cd4d1de2a33968cd0be2a91282a Mon Sep 17 00:00:00 2001
From: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
Date: Wed, 15 Dec 2021 13:01:05 +0200
Subject: dmaengine: at_xdmac: Start transfer for cyclic channels in issue_pending
From: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
commit e6af9b05bec63cd4d1de2a33968cd0be2a91282a upstream.
Cyclic channels must too call issue_pending in order to start a transfer.
Start the transfer in issue_pending regardless of the type of channel.
This wrongly worked before, because in the past the transfer was started
at tx_submit level when only a desc in the transfer list.
Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211215110115.191749-3-tudor.ambarus@xxxxxxxxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/dma/at_xdmac.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1718,11 +1718,9 @@ static void at_xdmac_issue_pending(struc
dev_dbg(chan2dev(&atchan->chan), "%s\n", __func__);
- if (!at_xdmac_chan_is_cyclic(atchan)) {
- spin_lock_irqsave(&atchan->lock, flags);
- at_xdmac_advance_work(atchan);
- spin_unlock_irqrestore(&atchan->lock, flags);
- }
+ spin_lock_irqsave(&atchan->lock, flags);
+ at_xdmac_advance_work(atchan);
+ spin_unlock_irqrestore(&atchan->lock, flags);
return;
}
Patches currently in stable-queue which might be from tudor.ambarus@xxxxxxxxxxxxx are
queue-5.10/dmaengine-at_xdmac-fix-concurrency-over-xfers_list.patch
queue-5.10/tty-serial-atmel-call-dma_async_issue_pending.patch
queue-5.10/dmaengine-at_xdmac-fix-lld-view-setting.patch
queue-5.10/dmaengine-at_xdmac-fix-at_xdmac_lld-struct-definition.patch
queue-5.10/dmaengine-at_xdmac-print-debug-message-after-realeasing-the-lock.patch
queue-5.10/dmaengine-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch
queue-5.10/dmaengine-at_xdmac-don-t-start-transactions-at-tx_submit-level.patch
queue-5.10/tty-serial-atmel-check-return-code-of-dmaengine_subm.patch
