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commitb9f9602012upstream. Under some circumstances, i.e. when test is still running and about to time out and user runs, for example, grep -H . /sys/module/dmatest/parameters/* the iterations parameter is not respected and test is going on and on until user gives echo 0 > /sys/module/dmatest/parameters/run This is not what expected. The history of this bug is interesting. I though that the commit2d88ce76eb("dmatest: add a 'wait' parameter") is a culprit, but looking closer to the code I think it simple revealed the broken logic from the day one, i.e. in the commit0a2ff57d6f("dmaengine: dmatest: add a maximum number of test iterations") which adds iterations parameter. So, to the point, the conditional of checking the thread to be stopped being first part of conjunction logic prevents to check iterations. Thus, we have to always check both conditions to be able to stop after given iterations. Since it wasn't visible before second commit appeared, I add a respective Fixes tag. Fixes:2d88ce76eb("dmatest: add a 'wait' parameter") Cc: Dan Williams <dan.j.williams@intel.com> Cc: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Link: https://lore.kernel.org/r/20200424161147.16895-1-andriy.shevchenko@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.
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.