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Patch "usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer" has been added to the 3.14-stable tree

PATCH [email protected] 1 participant 1 message Apr 17, 2016

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This is a note to let you know that I've just added the patch titled

usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer

to the 3.14-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-renesas_usbhs-disable-tx-irq-before-starting-tx-dmac-transfer.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 6490865c67825277b29638e839850882600b48ec Mon Sep 17 00:00:00 2001

From: Yoshihiro Shimoda <[email protected]>
Date: Thu, 10 Mar 2016 11:30:15 +0900
Subject: usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer

From: Yoshihiro Shimoda <[email protected]>

commit 6490865c67825277b29638e839850882600b48ec upstream.

This patch adds a code to surely disable TX IRQ of the pipe before starting TX DMAC transfer. Otherwise, a lot of unnecessary TX IRQs may happen in rare cases when DMAC is used.

Fixes e73a989 ("usb: renesas_usbhs: add DMAEngine support")
---
 drivers/usb/renesas_usbhs/fifo.c |    1 +
 1 file changed, 1 insertion(+)
drivers/usb/renesas_usbhs/fifo.c +1 -0
@@ -934,6 +934,7 @@ static int usbhsf_dma_try_pop(struct usb
 
 	pkt->trans = len;
 
+	usbhsf_tx_irq_ctrl(pipe, 0);
 	INIT_WORK(&pkt->work, xfer_work);
 	schedule_work(&pkt->work);
 

Patches currently in stable-queue which might be from [email protected] are

queue-3.14/usb-renesas_usbhs-avoid-null-pointer-derefernce-in-usbhsf_pkt_handler.patch queue-3.14/usb-renesas_usbhs-disable-tx-irq-before-starting-tx-dmac-transfer.patch