This is a note to let you know that I've just added the patch titled
usb: gadget: udc: renesas_usb3: Fix return value of usb3_write_pipe()
to the 4.9-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-gadget-udc-renesas_usb3-fix-return-value-of-usb3_write_pipe.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 447b8a01b84f048d93d43bfe1fcaa4fcc56595cc Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Date: Mon, 25 Sep 2017 17:01:25 +0900
Subject: usb: gadget: udc: renesas_usb3: Fix return value of usb3_write_pipe()
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
commit 447b8a01b84f048d93d43bfe1fcaa4fcc56595cc upstream.
This patch fixes an issue that this driver cannot go status stage
in control read when the req.zero is set to 1 and the len in
usb3_write_pipe() is set to 0. Otherwise, if we use g_ncm driver,
usb enumeration takes long time (5 seconds or more).
Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/udc/renesas_usb3.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -879,7 +879,7 @@ static int usb3_write_pipe(struct renesa
usb3_ep->ep.maxpacket);
u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
u32 tmp = 0;
- bool is_last;
+ bool is_last = !len ? true : false;
if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
return -EBUSY;
@@ -900,7 +900,8 @@ static int usb3_write_pipe(struct renesa
usb3_write(usb3, tmp, fifo_reg);
}
- is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
+ if (!is_last)
+ is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
/* Send the data */
usb3_set_px_con_send(usb3_ep, len, is_last);
Patches currently in stable-queue which might be from yoshihiro.shimoda.uh@xxxxxxxxxxx are
queue-4.9/usb-gadget-udc-renesas_usb3-fix-return-value-of-usb3_write_pipe.patch
queue-4.9/usb-gadget-udc-renesas_usb3-fix-pn_rammap.pn_mpkt-value.patch
queue-4.9/usb-renesas_usbhs-fix-usbhsf_fifo_clear-for-rx-direction.patch
queue-4.9/usb-gadget-udc-renesas_usb3-fix-for-no-data-control-transfer.patch
queue-4.9/usb-renesas_usbhs-fix-the-bclr-setting-condition-for-non-dcp-pipe.patch