Thread (16 messages) 16 messages, 4 authors, 2012-01-18

Re: [PATCH] input: Synaptics USB device driver

From: Oliver Neukum <hidden>
Date: 2012-01-04 09:18:57
Also in: lkml

Am Mittwoch, 4. Januar 2012, 09:55:19 schrieb Jiri Kosina:
On Tue, 3 Jan 2012, Jan Steinhoff wrote:

[ ... snip ... ]
quoted
+static int synusb_setup_iurb(struct synusb *synusb,
+                          struct usb_endpoint_descriptor *endpoint)
+{
+     char *buf;
+
+     if (endpoint->wMaxPacketSize < 8)
+             return 0;
+     if (synusb->iurb) {
+             synusb_warn(synusb, "Found more than one possible "
+                                 "int in endpoint");
+             return 0;
+     }
+     synusb->iurb = usb_alloc_urb(0, GFP_KERNEL);
+     if (synusb->iurb == NULL)
+             return -ENOMEM;
+     buf = usb_alloc_coherent(synusb->udev, 8, GFP_ATOMIC,
+                              &synusb->iurb->transfer_dma);
+     if (buf == NULL)
+             return -ENOMEM;
You seem to leak synusb->iurb here.
Seems so, but doesn't. It gets freed when the refcount hits 0.
Now, whether this is a good technique is another question.

	Regards
		Oliver
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