[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 <[EMAIL PROTECTED]>
Acked-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
commit 979063692726fa40863345fb1b62daf2f795ddc0
tree 36c3be1c8ed2d6fa675a8f65cef1b1f350cb0224
parent 0be930c546ad056cad5780ee9424a28cf979cb42
author Alan Stern <[EMAIL PROTECTED]> Tue, 03 Jan 2006 10:30:31 -0500
committer Greg Kroah-Hartman <[EMAIL PROTECTED]> Tue, 31 Jan 2006 17:23:42 -0800
drivers/usb/gadget/inode.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 9a4edc5..0aab7d2 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,
}
req->complete = ep0_complete;
req->length = len;
+ req->zero = 0;
return 0;
}
@@ -1161,10 +1163,13 @@ ep0_write (struct file *fd, const char _
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;
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