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RE: [PATCH] usb: gadget: f_fs: report error if excess data received

From Alan Stern <stern@rowland.harvard.edu>
Newsgroups linux.kernel
Subject RE: [PATCH] usb: gadget: f_fs: report error if excess data received
Date 2016-05-13 16:30 +0200
Message-ID <rymgi-55V-7@gated-at.bofh.it> (permalink)
References <ryeVs-6bm-11@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, 13 May 2016, Felipe Balbi wrote:

> We deliver to userspace the part userspace requested, right? So that's
> okay. The USB details WRT e.g. babble or host trying to send more data
> than expected, needs to be handled within the kernel.

The point is that you don't know whether the host sent more data than
expected.  All you know is that the host sent more data than the user
asked the kernel for -- but maybe the user didn't ask for all the data
that he expected.  Maybe the user wanted to retrieve the full set of
data using two read() system calls.

Alan Stern

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Thread

RE: [PATCH] usb: gadget: f_fs: report error if excess data received "Du, Changbin" <changbin.du@intel.com> - 2016-05-13 08:00 +0200
  RE: [PATCH] usb: gadget: f_fs: report error if excess data received Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-05-13 08:40 +0200
    RE: [PATCH] usb: gadget: f_fs: report error if excess data received "Du, Changbin" <changbin.du@intel.com> - 2016-05-13 12:40 +0200
    RE: [PATCH] usb: gadget: f_fs: report error if excess data received Alan Stern <stern@rowland.harvard.edu> - 2016-05-13 16:30 +0200
      Re: [PATCH] usb: gadget: f_fs: report error if excess data received Michal Nazarewicz <mina86@mina86.com> - 2016-05-14 22:40 +0200
      RE: [PATCH] usb: gadget: f_fs: report error if excess data received Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-05-16 15:10 +0200
        Re: [PATCH] usb: gadget: f_fs: report error if excess data received Michal Nazarewicz <mina86@mina86.com> - 2016-05-16 15:10 +0200
          Re: [PATCH] usb: gadget: f_fs: report error if excess data received Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-05-16 15:20 +0200
            Re: [PATCH] usb: gadget: f_fs: report error if excess data received Michal Nazarewicz <mina86@mina86.com> - 2016-05-16 21:10 +0200
              RE: [PATCH] usb: gadget: f_fs: report error if excess data received "Du, Changbin" <changbin.du@intel.com> - 2016-05-17 05:00 +0200
                Re: [PATCH] usb: gadget: f_fs: report error if excess data received Michal Nazarewicz <mina86@mina86.com> - 2016-05-18 11:50 +0200
                Re: [PATCH] usb: gadget: f_fs: report error if excess data received Felipe Balbi <felipe.balbi@linux.intel.com> - 2016-05-18 12:20 +0200
                Re: [PATCH] usb: gadget: f_fs: report error if excess data received Michal Nazarewicz <mina86@mina86.com> - 2016-05-18 15:40 +0200
                RE: [PATCH] usb: gadget: f_fs: report error if excess data received "Du, Changbin" <changbin.du@intel.com> - 2016-05-19 05:00 +0200
                Re: [PATCH] usb: gadget: f_fs: report error if excess data received Michal Nazarewicz <mina86@mina86.com> - 2016-05-19 09:40 +0200
                RE: [PATCH] usb: gadget: f_fs: report error if excess data received "Du, Changbin" <changbin.du@intel.com> - 2016-05-19 11:00 +0200
                RE: [PATCH] usb: gadget: f_fs: report error if excess data received "Du, Changbin" <changbin.du@intel.com> - 2016-05-19 04:40 +0200

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