This is a note to let you know that I've just added the patch titled
usb: gadgetfs: return number of bytes on ep0 read request
to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also will be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>From 85b4b3c8c189e0159101f7628a71411af072ff69 Mon Sep 17 00:00:00 2001
From: Thomas Faber <[email protected]>
Date: Fri, 2 Mar 2012 09:41:50 +0100
Subject: usb: gadgetfs: return number of bytes on ep0 read request
A read from GadgetFS endpoint 0 during the data stage of a control
request would always return 0 on success (as returned by
wait_event_interruptible) despite having written data into the user
buffer.
This patch makes it correctly set the return value to the number of
bytes read.
Signed-off-by: Thomas Faber <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/gadget/inode.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index ae04266..4f18a0e 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1043,6 +1043,8 @@ ep0_read (struct file *fd, char __user *buf, size_t len,
loff_t *ptr)
// FIXME don't call this with the spinlock held ...
if (copy_to_user (buf, dev->req->buf, len))
retval = -EFAULT;
+ else
+ retval = len;
clean_req (dev->gadget->ep0, dev->req);
/* NOTE userspace can't yet choose to stall */
}
--
1.7.9
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