f2243b8278
TX_DESC_NUM is 256, in tx_count, the maximum value of mod(TX_DESC_NUM - 1) is 254, the variable "count" in the hip04_mac_start_xmit function is never equal to (TX_DESC_NUM - 1), so hip04_mac_start_xmit never return NETDEV_TX_BUSY. tx_count is modified to mod(TX_DESC_NUM) so that the maximum value of tx_count can reach (TX_DESC_NUM - 1), then hip04_mac_start_xmit can reurn NETDEV_TX_BUSY. Signed-off-by: Jiangfeng Xiao <xiaojiangfeng@huawei.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.