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

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Message-Id: <1512008560-28594-1-git-send-email-yuyang.du@intel.com>
Date:   Thu, 30 Nov 2017 10:22:40 +0800
From:   Yuyang Du <yuyang.du@...el.com>
To:     shuah@...nel.org, valentina.manea.m@...il.com
Cc:     gregkh@...uxfoundation.org, k.opasiak@...sung.com,
        kstewart@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, juan.zea@...del.com,
        Yuyang Du <yuyang.du@...el.com>
Subject: [PATCH] usbip: Fix USB device hang due to wrong enabling of scatter-gather

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

diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c
index 713e941..6b3278c 100644
--- a/drivers/usb/usbip/vhci_hcd.c
+++ b/drivers/usb/usbip/vhci_hcd.c
@@ -1098,7 +1098,6 @@ static int hcd_name_to_id(const char *name)
 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;
-- 
2.7.4