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a3dbff6eec
The driver may sleep under a spin lock, and the function call path is: snd_cx18_pcm_hw_free (acquire the lock by spin_lock_irqsave) vfree --> may sleep To fix it, the "substream->runtime->dma_area" is passed to a temporary value, and mark it NULL when holding the lock. The memory is freed by vfree through the temporary value outside the lock holding. Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com> [hans.verkuil@cisco.com: removed unnecessary 'if (dma_area)'] Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.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.