5.4-stable patches

added patches:
	dmaengine-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch

diff --git a/queue-5.4/dmaengine-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch b/queue-5.4/dmaengine-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch
new file mode 100644 (file)
index 0000000..9bf5be6
--- /dev/null
+++ b/queue-5.4/dmaengine-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch
@@ -0,0 +1,43 @@
+From foo@baz Fri Feb 18 10:40:40 AM CET 2022
+From: Tudor Ambarus <tudor.ambarus@microchip.com>
+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@microchip.com>
+
+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")
+Change-Id: If1bf3e13329cebb9904ae40620f6cf2b7f06fe9f
+Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
+Link: https://lore.kernel.org/r/20211215110115.191749-3-tudor.ambarus@microchip.com
+Signed-off-by: Vinod Koul <vkoul@kernel.org>
+Signed-off-by: Mickael GARDET <m.gardet@overkiz.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/dma/at_xdmac.c |    6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+--- a/drivers/dma/at_xdmac.c
++++ b/drivers/dma/at_xdmac.c
+@@ -1726,11 +1726,13 @@ static irqreturn_t at_xdmac_interrupt(in
+ static void at_xdmac_issue_pending(struct dma_chan *chan)
+ {
+       struct at_xdmac_chan *atchan = to_at_xdmac_chan(chan);
++      unsigned long flags;
+ 
+       dev_dbg(chan2dev(&atchan->chan), "%s\n", __func__);
+ 
+-      if (!at_xdmac_chan_is_cyclic(atchan))
+-              at_xdmac_advance_work(atchan);
++      spin_lock_irqsave(&atchan->lock, flags);
++      at_xdmac_advance_work(atchan);
++      spin_unlock_irqrestore(&atchan->lock, flags);
+ 
+       return;
+ }

diff --git a/queue-5.4/series b/queue-5.4/series
index 5159f9a89f7c5dd97e4bec6b8211fe3877e9950f..d46e3c2c9a5e96d55f6b18c6633aad003b8f3e85 100644 (file)
--- a/queue-5.4/series
+++ b/queue-5.4/series
@@ -30,3 +30,4 @@ ext4-check-for-out-of-order-index-extents-in-ext4_valid_extent_entries.patch
 ext4-check-for-inconsistent-extents-between-index-and-leaf-block.patch
 ext4-prevent-partial-update-of-the-extent-blocks.patch
 taskstats-cleanup-the-use-of-task-exit_code.patch
+dmaengine-at_xdmac-start-transfer-for-cyclic-channels-in-issue_pending.patch