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| Filename | Latest commit message | Latest commit date |
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1c0e6a3613
This patch refactors the macro INTRL_USEC_TO_REG into a static inline function and fixes a couple subtle bugs caused by the macro. This patch fixes a bug which was caused by passing a bad register value to the firmware. If enabling interrupt rate limiting, a non-zero value for the rate limit must be used. Otherwise the firmware sets the interrupt rate limit to the maximum value. Due to the limited resolution of the register, attempting to set a value of 1, 2, or 3 would be rounded down to 0 and limiting was left enabled, causing unexpected behavior. This patch also fixes a possible bug in which using the macro itself can introduce unintended side-affects because the macro argument is used more than once in the macro definition (e.g. a variable post-increment argument would perform a double increment on the variable). Without this patch, attempting to set interrupt rate limits of 1, 2, or 3 results in unexpected behavior and future use of this macro could cause subtle bugs. Change-Id: I83ac842de0ca9c86761923d6e3a4d7b1b95f2b3f Signed-off-by: Alan Brady <alan.brady@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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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.