This is a note to let you know that I've just added the patch titled usb: renesas_usbhs: protect the CFIFOSEL setting in usbhsg_ep_enable() 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-protect-the-cfifosel-setting-in-usbhsg_ep_enable.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 <stable@xxxxxxxxxxxxxxx> know about it. >From 15e4292a2d21e9997fdb2b8c014cc461b3f268f0 Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> Date: Wed, 8 Jun 2016 16:32:50 +0900 Subject: usb: renesas_usbhs: protect the CFIFOSEL setting in usbhsg_ep_enable() From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx> commit 15e4292a2d21e9997fdb2b8c014cc461b3f268f0 upstream. This patch fixes an issue that the CFIFOSEL register value is possible to be changed by usbhsg_ep_enable() wrongly. And then, a data transfer using CFIFO may not work correctly. For example: # modprobe g_multi file=usb-storage.bin # ifconfig usb0 192.168.1.1 up (During the USB host is sending file to the mass storage) # ifconfig usb0 down In this case, since the u_ether.c may call usb_ep_enable() in eth_stop(), if the renesas_usbhs driver is also using CFIFO for mass storage, the mass storage may not work correctly. So, this patch adds usbhs_lock() and usbhs_unlock() calling in usbhsg_ep_enable() to protect CFIFOSEL register. This is because: - CFIFOSEL.CURPIPE = 0 is also needed for the pipe configuration - The CFIFOSEL (fifo->sel) is already protected by usbhs_lock() Fixes: 97664a207bc2 ("usb: renesas_usbhs: shrink spin lock area") 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/renesas_usbhs/mod_gadget.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/drivers/usb/renesas_usbhs/mod_gadget.c +++ b/drivers/usb/renesas_usbhs/mod_gadget.c @@ -558,6 +558,9 @@ static int usbhsg_ep_enable(struct usb_e struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv); struct usbhs_pipe *pipe; int ret = -EIO; + unsigned long flags; + + usbhs_lock(priv, flags); /* * if it already have pipe, @@ -566,7 +569,8 @@ static int usbhsg_ep_enable(struct usb_e if (uep->pipe) { usbhs_pipe_clear(uep->pipe); usbhs_pipe_sequence_data0(uep->pipe); - return 0; + ret = 0; + goto usbhsg_ep_enable_end; } pipe = usbhs_pipe_malloc(priv, @@ -594,6 +598,9 @@ static int usbhsg_ep_enable(struct usb_e ret = 0; } +usbhsg_ep_enable_end: + usbhs_unlock(priv, flags); + return ret; } Patches currently in stable-queue which might be from yoshihiro.shimoda.uh@xxxxxxxxxxx are queue-3.14/usb-renesas_usbhs-protect-the-cfifosel-setting-in-usbhsg_ep_enable.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html