usb: gadget: udc: renesas_usb3: Fix return value of usb3_write_pipe()

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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: 746bfe63bb ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Cc: <stable@vger.kernel.org> # v4.5+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

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Yoshihiro Shimoda 2017-09-25 17:01:25 +09:00 • committed by Felipe Balbi

parent 73f2f5745f

commit 447b8a01b8

1 changed files with 3 additions and 2 deletions

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drivers/usb/gadget/udc/renesas_usb3.c

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