Commit 225a1dd5 authored Oct 18, 2013 by Pavankumar Kondeti

usb: gadget: u_ctrl_hsic: Fix hsic control endpoint stall



The USB EHCI and XHCI drivers assume that there will be only IN
status stage for 0 data length control transfers. If the device
connected over HSIC submits data on the control OUT endpoint, the
control transfer will never get finished.

There is no significance to 0 length SEND_ENCAPSULATED command. Fix
the control endpoint stall by dropping such packets.

CRs-Fixed: 563403
Change-Id: Ia9d4d8f6437abde7faffabbe5105cd53b9f2cd4d
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>

parent f34d9bd5

drivers/usb/gadget/u_ctrl_hsic.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -114,6 +114,11 @@ ghsic_send_cpkt_tomodem(u8 portno, void *buf, size_t len)
		return -ENODEV;
		}

		if (!len) {
		pr_debug("%s: dropping 0 len command\n", __func__);
		return 0;
		}

		cbuf = kmalloc(len, GFP_ATOMIC);
		if (!cbuf)
		return -ENOMEM;