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Subject[PATCH 074/241] USB: usb_wwan: fix bulk-urb allocation
Date
3.5.7.2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <jhovold@gmail.com>

commit 8e493ca1767d4951ed1322abaa74d6edbca29918 upstream.

Make sure we do not allocate urbs if we do not have a bulk endpoint.

Legacy code used incorrect assumption to test for bulk endpoints.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ herton: backport for 3.5: allocation splitted in attach (in
usb_wwan_setup_urbs and usb_wwan_startup), so patch two
locations with the size checking. ]
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
---
drivers/usb/serial/usb_wwan.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index f35971d..da28535 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -453,9 +453,6 @@ static struct urb *usb_wwan_setup_urb(struct usb_serial *serial, int endpoint,
{
struct urb *urb;

- if (endpoint == -1)
- return NULL; /* endpoint not needed */
-
urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
if (urb == NULL) {
dbg("%s: alloc for endpoint %d failed.", __func__, endpoint);
@@ -483,6 +480,9 @@ static void usb_wwan_setup_urbs(struct usb_serial *serial)

/* Do indat endpoints first */
for (j = 0; j < N_IN_URB; ++j) {
+ if (!port->bulk_in_size)
+ break;
+
portdata->in_urbs[j] = usb_wwan_setup_urb(serial,
port->
bulk_in_endpointAddress,
@@ -496,6 +496,9 @@ static void usb_wwan_setup_urbs(struct usb_serial *serial)

/* outdat endpoints */
for (j = 0; j < N_OUT_URB; ++j) {
+ if (!port->bulk_out_size)
+ break;
+
portdata->out_urbs[j] = usb_wwan_setup_urb(serial,
port->
bulk_out_endpointAddress,
@@ -529,6 +532,9 @@ int usb_wwan_startup(struct usb_serial *serial)
init_usb_anchor(&portdata->delayed);

for (j = 0; j < N_IN_URB; j++) {
+ if (!port->bulk_in_size)
+ break;
+
buffer = (u8 *) __get_free_page(GFP_KERNEL);
if (!buffer)
goto bail_out_error;
@@ -536,6 +542,9 @@ int usb_wwan_startup(struct usb_serial *serial)
}

for (j = 0; j < N_OUT_URB; j++) {
+ if (!port->bulk_out_size)
+ break;
+
buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
if (!buffer)
goto bail_out_error2;
--
1.7.9.5


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