media: igorplugusb: respect DMA coherency

The coherency rules mean that you cannot embed
a buffer inside a descriptor. kmalloc() separately.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/media/rc/igorplugusb.c b/drivers/media/rc/igorplugusb.c
index b40dbf5001869eb5e7954248091a752f8931e88e..b46362da862352ed1d308d0c73f4827f49a8b6e2 100644 (file)
--- a/drivers/media/rc/igorplugusb.c
+++ b/drivers/media/rc/igorplugusb.c
@@ -38,7 +38,7 @@ struct igorplugusb {
 
        struct timer_list timer;
 
-       uint8_t buf_in[MAX_PACKET];
+       u8 *buf_in;
 
        char phys[64];
 };
@@ -177,6 +177,9 @@ static int igorplugusb_probe(struct usb_interface *intf,
        if (!ir->urb)
                goto fail;
 
+       ir->buf_in = kmalloc(MAX_PACKET, GFP_KERNEL);
+       if (!ir->buf_in)
+               goto fail;
        usb_fill_control_urb(ir->urb, udev,
                usb_rcvctrlpipe(udev, 0), (uint8_t *)&ir->request,
                ir->buf_in, sizeof(ir->buf_in), igorplugusb_callback, ir);
@@ -223,6 +226,7 @@ fail:
        rc_free_device(ir->rc);
        usb_free_urb(ir->urb);
        del_timer(&ir->timer);
+       kfree(ir->buf_in);
 
        return ret;
 }
@@ -236,6 +240,7 @@ static void igorplugusb_disconnect(struct usb_interface *intf)
        usb_set_intfdata(intf, NULL);
        usb_kill_urb(ir->urb);
        usb_free_urb(ir->urb);
+       kfree(ir->buf_in);
 }
 
 static const struct usb_device_id igorplugusb_table[] = {