Hello.
On 9/14/2015 12:45 PM, Igor Kotrasinski wrote:
transfer() schedules a rescan for transfers larger than
maxpacket, which is wrong for transfers that are multiples
of maxpacket.
Rewrite to fix and clarify packet multiple / remainder
transfer logic.
Signed-off-by: Igor Kotrasinski <[email protected]>
---
drivers/usb/gadget/udc/dummy_hcd.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c
b/drivers/usb/gadget/udc/dummy_hcd.c
index 552c533..0ba0ab3 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
[...]
@@ -1324,12 +1325,18 @@ top:
if (len == 0)
break;
- /* use an extra pass for the final short packet */
- if (len > ep->ep.maxpacket) {
- rescan = 1;
- len -= (len % ep->ep.maxpacket);
+ /* send multiple of maxpacket first, then remainder */
+ rem = (len % ep->ep.maxpacket);
Parens not needed here (and weren't needed before your change).
[...]
MBR, Sergei
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