sizeof when applied to a pointer typed expression gives the size of the
pointer.
Found by coccinelle spatch "misc/noderef.cocci"

Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---

diff -u -p a/drivers/staging/octeon-usb/cvmx-usb.c 
b/drivers/staging/octeon-usb/cvmx-usb.c
--- a/drivers/staging/octeon-usb/cvmx-usb.c
+++ b/drivers/staging/octeon-usb/cvmx-usb.c
@@ -604,7 +604,7 @@ int cvmx_usb_initialize(struct cvmx_usb_
                        }
        }
 
-       memset(usb, 0, sizeof(usb));
+       memset(usb, 0, sizeof(*usb));
        usb->init_flags = flags;
 
        /* Initialize the USB state structure */
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