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| Filename | Latest commit message | Latest commit date |
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1f7f504dcd
In case of a resource shortage, i.e. the rx_offload queue will overflow or a skb fails to be allocated (due to OOM), can_rx_offload_offload_one() will call mailbox_read() to discard the mailbox and return an ERR_PTR. If the hardware FIFO is empty can_rx_offload_offload_one() will return NULL. In case a CAN frame was read from the hardware, can_rx_offload_offload_one() returns the skb containing it. Without this patch can_rx_offload_irq_offload_fifo() bails out if no skb returned, regardless of the reason. Similar to can_rx_offload_irq_offload_timestamp() in case of a resource shortage the whole FIFO should be discarded, to avoid an IRQ storm and give the system some time to recover. However if the FIFO is empty the loop can be left. With this patch the loop is left in case of empty FIFO, but not on errors. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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| README | ||
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.