usb: gadget: udc: renesas_usb3: protect usb3_ep->started in usb3_start_pipen()
authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tue, 18 Jul 2017 12:26:42 +0000 (21:26 +0900)
committerFelipe Balbi <felipe.balbi@linux.intel.com>
Tue, 18 Jul 2017 13:20:31 +0000 (16:20 +0300)
commit781001ff9678e5df048cca3d4290c1638a28cafa
tree1b86a7b0e8e378faf5d3fdc17fc1caa356a825dd
parentebe6b2b81464a2c083542feb1a1a6c78a2268151
usb: gadget: udc: renesas_usb3: protect usb3_ep->started in usb3_start_pipen()

This patch fixes an issue that unexpected behavior happens when
both the interrupt handler and renesas_usb3_ep_enable() are called.
In this case, since usb3_start_pipen() checked the usb3_ep->started,
but the flags was not protected. So, this patch protects the flag
by usb3->lock. Since renesas_usb3_ep_enable() for EP0 will be not called,
this patch doesn't take care of usb3_start_pipe0().

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
drivers/usb/gadget/udc/renesas_usb3.c