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Message-ID: <4F5087CE.50304@gmx.de> Date: Fri, 02 Mar 2012 09:41:50 +0100 From: Thomas Faber <thfabba@....de> To: Felipe Balbi <balbi@...com>, linux-usb@...r.kernel.org CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org Subject: [PATCH] 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 <thfabba@....de> --- 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 */ } -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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