usb: gadget: Use unaligned access for wMaxPacketSize

Use get_unaligned() while fetching wMaxPacketSize to avoid
voilating any alignment rules.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Piotr Wilczek <p.wilczek@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Lukasz Dalek <luk0104@gmail.com>
Cc: Marek Vasut <marex@denx.de>

diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index c28866f..45bc132 100644 (file)
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -2261,7 +2261,8 @@ reset:
        if (rc)
                goto reset;
        fsg->bulk_out_enabled = 1;
-       common->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
+       common->bulk_out_maxpacket =
+                               le16_to_cpu(get_unaligned(&d->wMaxPacketSize));
        clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
 
        /* Allocate the requests */

diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index 9ce98f0..085503d 100644 (file)
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -314,7 +314,8 @@ static int pxa25x_ep_enable(struct usb_ep *_ep,
        if (!_ep || !desc || ep->desc || _ep->name == ep0name
                        || desc->bDescriptorType != USB_DT_ENDPOINT
                        || ep->bEndpointAddress != desc->bEndpointAddress
-                       || ep->fifo_size < le16_to_cpu(desc->wMaxPacketSize)) {
+                       || ep->fifo_size <
+                          le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
                printf("%s, bad ep or descriptor\n", __func__);
                return -EINVAL;
        }
@@ -329,9 +330,9 @@ static int pxa25x_ep_enable(struct usb_ep *_ep,
 
        /* hardware _could_ do smaller, but driver doesn't */
        if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
-                               && le16_to_cpu(desc->wMaxPacketSize)
+                       && le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))
                                                != BULK_FIFO_SIZE)
-                       || !desc->wMaxPacketSize) {
+                       || !get_unaligned(&desc->wMaxPacketSize)) {
                printf("%s, bad %s maxpacket\n", __func__, _ep->name);
                return -ERANGE;
        }
@@ -345,7 +346,7 @@ static int pxa25x_ep_enable(struct usb_ep *_ep,
        ep->desc = desc;
        ep->stopped = 0;
        ep->pio_irqs = 0;
-       ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+       ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
 
        /* flush fifo (mostly for OUT buffers) */
        pxa25x_ep_fifo_flush(_ep);
@@ -485,7 +486,7 @@ write_fifo(struct pxa25x_ep *ep, struct pxa25x_request *req)
 {
        unsigned max;
 
-       max = le16_to_cpu(ep->desc->wMaxPacketSize);
+       max = le16_to_cpu(get_unaligned(&ep->desc->wMaxPacketSize));
        do {
                unsigned count;
                int is_last, is_short;
@@ -766,7 +767,7 @@ pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
         */
        if (unlikely(ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
                        && req->req.length >
-                       le16_to_cpu(ep->desc->wMaxPacketSize)))
+                       le16_to_cpu(get_unaligned(&ep->desc->wMaxPacketSize))))
                return -EMSGSIZE;
 
        debug_cond(NOISY, "%s queue req %p, len %d buf %p\n",