Unless HW sets quirk_ep_out_aligned_size, gadget driver shouldn't make
any efforts towards aligning transfers. If the UDC needs, it *must*
set the quirk flag.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
tested with Intel Edison (DWC3) and "g_ether use_eem=1"
drivers/usb/gadget/function/u_ether.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index cba6ff683f2c..a8b40d07e927 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -178,6 +178,7 @@ static void rx_complete(struct usb_ep *ep, struct usb_request *req);
static int
rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
{
+ struct usb_gadget *g = dev->gadget;
struct sk_buff *skb;
int retval = -ENOMEM;
size_t size = 0;
@@ -209,8 +210,11 @@ rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
*/
size += sizeof(struct ethhdr) + dev->net->mtu + RX_EXTRA;
size += dev->port_usb->header_len;
- size += out->maxpacket - 1;
- size -= size % out->maxpacket;
+
+ if (g->quirk_ep_out_aligned_size) {
+ size += out->maxpacket - 1;
+ size -= size % out->maxpacket;
+ }
if (dev->port_usb->is_fixed)
size = max_t(size_t, size, dev->port_usb->fixed_out_len);
--
2.11.0.295.gd7dffce1ce
--
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