From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 13 Jan 2012 18:04:17 +0000 (+0100)
Subject: usb/uhci: initialize sg_table properly
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=2851784f4d820bc697a8cc608509f9e3975c80e5;p=deliverable%2Flinux.git

usb/uhci: initialize sg_table properly

Commit 689d6eac ("USB: UHCI: add native scatter-gather support(v1))
added sg support to uhci but forgot to set the sg_table so this feature
remained unused.

Cc: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index 6b5eb1017e2c..e37dea87bb56 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -565,6 +565,9 @@ static int uhci_start(struct usb_hcd *hcd)
 	struct dentry __maybe_unused *dentry;
 
 	hcd->uses_new_polling = 1;
+	/* Accept arbitrarily long scatter-gather lists */
+	if (!(hcd->driver->flags & HCD_LOCAL_MEM))
+		hcd->self.sg_tablesize = ~0;
 
 	spin_lock_init(&uhci->lock);
 	setup_timer(&uhci->fsbr_timer, uhci_fsbr_timeout,