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ab42676af0
When configuring the MVPP2_ISR_RX_THRESHOLD_REG with the RX coalescing time threshold, we do not check for the maximum allowed value supported by the driver, which means we might overflow and use a bogus value. This commit adds a check for this situation, and if a value higher than what is supported by the hardware is provided, then we use the maximum value supported by the hardware. In order to achieve this in a way that avoids overflow and rounding errors, we introduce two utility functions mvpp2_usec_to_cycles() and cycles_to_usec(). Many thanks to Russell King for suggesting this implementation. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.