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Subject[RESEND/PATCH 3/6] USB: musb-gadget: enable autoclear for OUT transfer in both DMA 0 and DMA 1
From: Ming Lei <>

This patch fixes one bugs of OUT transfer in double buffer case:

-the current code only enable autoclear for dma mode 1, and not
for dma mode 0

Without this patch, test #5 of usbtest can't be passed if we
configure musb as g_zero and use fifo mode 3 to enable double
buffer mode.

With this patch and the following patch(fix dma length),
on my beagle B5, test#5(queued bulk out) may go beyond
18Mbyte/s(seems dma mode 0 is quicker in double buffer case)
if musb is configured as g_zero and fifo mode 3 is taken, follows
the test command:

#./testusb -D DEV_NAME -c 1024 -t 5 -s 32768 -g 8 [1]

Also I have tested this patch can't make g_ether broken.

[1],source of testusb : tools/usb/testusb.c under linux kernel;

Signed-off-by: Ming Lei <>
Cc: David Brownell <>
Cc: Felipe Balbi <>
Cc: Anand Gadiyar <>
Cc: Mike Frysinger <>
Cc: Sergei Shtylyov <>
drivers/usb/musb/musb_gadget.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index f206c94..176e127 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -643,8 +643,8 @@ static void rxstate(struct musb *musb, struct musb_request *req)

-#ifdef USE_MODE1
+#ifdef USE_MODE1
/* csr |= MUSB_RXCSR_DMAMODE; */

/* this special sequence (enabling and then

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