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[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 <stern@rowland.harvard.edu>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2006-01-03 10:30:31 -05:00 committed by Greg Kroah-Hartman
parent 0be930c546
commit 9790636927
1 changed files with 7 additions and 1 deletions
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8
drivers/usb/gadget/inode.c
View File

@ -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 @@ unrecognized:
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;