linux-kernel - [PATCH 4.14 06/75] usbip: Fix USB device hang due to wrong enabling of scatter-gather

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Message-Id: <20171207130818.993014904@linuxfoundation.org>
Date:   Thu,  7 Dec 2017 14:07:28 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Juan Zea <juan.zea@...del.com>,
        Yuyang Du <yuyang.du@...el.com>,
        Shuah Khan <shuahkh@....samsung.com>
Subject: [PATCH 4.14 06/75] usbip: Fix USB device hang due to wrong enabling of scatter-gather

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yuyang Du <yuyang.du@...el.com>

commit 770b2edece42fa55bbe7d4cbe53347a07b8968d4 upstream.

The previous USB3 SuperSpeed enabling patches mistakenly enabled
URB scatter-gather chaining, which is actually not supported by
the VHCI HCD. This patch fixes that.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=197867
Fixes: 03cd00d538a6feb ("usbip: vhci-hcd: Set the vhci structure up to work")
Reported-by: Juan Zea <juan.zea@...del.com>
Signed-off-by: Yuyang Du <yuyang.du@...el.com>
Acked-by: Shuah Khan <shuahkh@....samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/usbip/vhci_hcd.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -1112,7 +1112,6 @@ static int hcd_name_to_id(const char *na
 static int vhci_setup(struct usb_hcd *hcd)
 {
 	struct vhci *vhci = *((void **)dev_get_platdata(hcd->self.controller));
-	hcd->self.sg_tablesize = ~0;
 	if (usb_hcd_is_primary_hcd(hcd)) {
 		vhci->vhci_hcd_hs = hcd_to_vhci_hcd(hcd);
 		vhci->vhci_hcd_hs->vhci = vhci;