| From | Herton Ronaldo Krzesinski <> | Subject | [PATCH 074/241] USB: usb_wwan: fix bulk-urb allocation | Date | Thu, 13 Dec 2012 11:57:19 -0200 |
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3.5.7.2 -stable review patch. If anyone has any objections, please let me know.
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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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