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2c3387109d
The call path in enetc_close() is:
enetc_close()
-> enetc_free_rxtx_rings()
-> enetc_free_rx_ring()
-> tests whether rx_ring->rx_swbd is NULL
-> enetc_free_tx_ring()
-> tests whether tx_ring->tx_swbd is NULL
-> enetc_free_rx_resources()
-> enetc_free_rxbdr()
-> sets rxr->rx_swbd to NULL
-> enetc_free_tx_resources()
-> enetc_free_txbdr()
-> setx txr->tx_swbd to NULL
From the above, it is clear that due to the function ordering, the
checks for NULL are redundant, since the software buffer descriptor
arrays have not yet been set to NULL. Drop these checks.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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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.