Each TD can maintain five buffer pointers. Each of them is 4k aligned.
There is no need to limit this to less then possible. This patch lowers
the overhead of extra TDs.
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
---
drivers/usb/chipidea/udc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 70296c7..007a97a 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -693,8 +693,8 @@ static int _ep_queue(struct usb_ep *ep, struct usb_request *req,
goto done;
}
- if (req->length > 4 * CI13XXX_PAGE_SIZE) {
- req->length = 4 * CI13XXX_PAGE_SIZE;
+ if (req->length > 5 * CI13XXX_PAGE_SIZE) {
+ req->length = 5 * CI13XXX_PAGE_SIZE;
retval = -EMSGSIZE;
dev_warn(mEp->ci->dev, "request length truncated\n");
}
--
1.8.2.rc2
--
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