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43d8b63623
The used way to compute jiffies timeout brokes when jiffie difference is 1. Assume that nand_soft_waitrdy is called with timeout_ms==1. Jiffies are 1000 for example (assume something more like 1000.99 - just before incrementing to 1001). We compute timeout_ms = 1000+msecs_to_jiffies(1) = 1001. nand_read_data_op is called for the first time and returns 0. During the call jiffies changes to 1001 thus "while loop" ends here (wrongly). Notice that routine was called with expected timeout 1ms but actual timeout used was something between 0...1ms. Fixes STM32MP1 FMC2 NAND controller which sometimes failed exactly in this way. Signed-off-by: Martin Devera <devik@eaxlabs.cz> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20200116135431.17480-1-devik@eaxlabs.cz |
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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.