[U-Boot] [PATCH 2/2] usb: gadget: Use unaligned access for wMaxPacketSize
Vivek Gautam
gautam.vivek at samsung.com
Mon May 13 12:23:38 CEST 2013
Use get_unaligned() while fetching wMaxPacketSize to avoid
voilating any alignment rules.
Signed-off-by: Vivek Gautam <gautam.vivek at samsung.com>
Cc: Lukasz Majewski <l.majewski at samsung.com>
Cc: Piotr Wilczek <p.wilczek at samsung.com>
Cc: Kyungmin Park <kyungmin.park at samsung.com>
Cc: Lukasz Dalek <luk0104 at gmail.com>
Cc: Marek Vasut <marex at denx.de>
---
Just did a build test on u-boot-usb/master branch.
Need to be tested further.
Based on u-boot-usb/next.
drivers/usb/gadget/f_mass_storage.c | 3 ++-
drivers/usb/gadget/pxa25x_udc.c | 13 +++++++------
2 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index c28866f..45bc132 100644
--- 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
--- 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",
--
1.7.6.5
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