From 979063692726fa40863345fb1b62daf2f795ddc0 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 3 Jan 2006 10:30:31 -0500 Subject: [PATCH] [PATCH] USB: gadgetfs: set "zero" flag for short control-IN response This patch (as622) makes gadgetfs set the "zero" flag for control-IN responses, when the length of the response is shorter than the length of the request. Signed-off-by: Alan Stern Acked-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/inode.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c index 9a4edc5657aa..0aab7d24c768 100644 --- a/drivers/usb/gadget/inode.c +++ b/drivers/usb/gadget/inode.c @@ -135,6 +135,7 @@ struct dev_data { setup_out_ready : 1, setup_out_error : 1, setup_abort : 1; + unsigned setup_wLength; /* the rest is basically write-once */ struct usb_config_descriptor *config, *hs_config; @@ -942,6 +943,7 @@ static int setup_req (struct usb_ep *ep, struct usb_request *req, u16 len) } req->complete = ep0_complete; req->length = len; + req->zero = 0; return 0; } @@ -1161,10 +1163,13 @@ ep0_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr) spin_unlock_irq (&dev->lock); if (copy_from_user (dev->req->buf, buf, len)) retval = -EFAULT; - else + else { + if (len < dev->setup_wLength) + dev->req->zero = 1; retval = usb_ep_queue ( dev->gadget->ep0, dev->req, GFP_KERNEL); + } if (retval < 0) { spin_lock_irq (&dev->lock); clean_req (dev->gadget->ep0, dev->req); @@ -1483,6 +1488,7 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) delegate: dev->setup_in = (ctrl->bRequestType & USB_DIR_IN) ? 1 : 0; + dev->setup_wLength = w_length; dev->setup_out_ready = 0; dev->setup_out_error = 0; value = 0; -- GitLab