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When the QMI_WWAN_FLAG_PASS_THROUGH is set, netif_rx() is called from qmi_wwan_rx_fixup(). When the call to netif_rx() is successful (which is most of the time), usbnet_skb_return() is called (from rx_process()). usbnet_skb_return() will then call netif_rx() a second time for the same skb. Simplify the code and avoid the redundant netif_rx() call by changing qmi_wwan_rx_fixup() to always return 1 when QMI_WWAN_FLAG_PASS_THROUGH is set. We then leave it up to the existing infrastructure to call netif_rx(). Suggested-by: Bjørn Mork <bjorn@mork.no> Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.