This is a note to let you know that I've just added the patch titled
usb: musb: Fix DMA desired mode for Mentor DMA engine
to the 4.4-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:
usb-musb-fix-dma-desired-mode-for-mentor-dma-engine.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bba40e6948b94cba71965285fbac31bd078c024a Mon Sep 17 00:00:00 2001
From: Cristian Birsan <cristian.birsan@xxxxxxxxxxxxx>
Date: Thu, 11 Feb 2016 08:58:17 -0700
Subject: usb: musb: Fix DMA desired mode for Mentor DMA engine
From: Cristian Birsan <cristian.birsan@xxxxxxxxxxxxx>
commit bba40e6948b94cba71965285fbac31bd078c024a upstream.
Commit 754fe4a92c07 ("usb: musb: Remove ifdefs for TX DMA for musb_host.c")
introduces a problem setting the desired channel mode for the Mentor DMA
engine.
There is a case where an address is incorrectly assigned to the DMA
channel desired mode when it should instead be assigned the actual mode
value. This results in the value of channel->desired_mode not being
correct.
Acked-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Cristian Birsan <cristian.birsan@xxxxxxxxxxxxx>
Signed-off-by: Joshua Henderson <joshua.henderson@xxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxxxxxx>
Cc: Adam Ford <aford173@xxxxxxxxx>
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/musb/musb_host.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -661,7 +661,7 @@ static int musb_tx_dma_set_mode_mentor(s
csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAMODE);
csr |= MUSB_TXCSR_DMAENAB; /* against programmer's guide */
}
- channel->desired_mode = mode;
+ channel->desired_mode = *mode;
musb_writew(epio, MUSB_TXCSR, csr);
return 0;
Patches currently in stable-queue which might be from cristian.birsan@xxxxxxxxxxxxx are
queue-4.4/usb-musb-fix-dma-for-host-mode.patch
queue-4.4/usb-musb-fix-dma-desired-mode-for-mentor-dma-engine.patch
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