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authorJon Hunter <jonathanh@nvidia.com>2016-10-22 20:23:52 +0100
committerThierry Reding <treding@nvidia.com>2016-11-15 15:51:52 +0100
commitf4392d6da5f52727a53298321f4dfeac6df1a093 (patch)
treeabdb54e436b6687280574d9b9cfebb5130cfc39e /.gitignore
parent21b4991051780b49b217c363f79366ed94c3b4b7 (diff)
downloadlinux-f4392d6da5f52727a53298321f4dfeac6df1a093.tar.bz2
soc/tegra: pmc: Guard against uninitialised PMC clock
It is possible for the public functions, tegra_io_rail_power_on/off() to be called before the PMC device has been probed. If this happens then the pmc->clk member will not be initialised and the call to clk_get_rate() in tegra_io_rail_prepare() will return zero and lead to a divide-by-zero exception. The function clk_get_rate() will return zero if a NULl clk pointer is passed. Therefore, rather that checking if pmc->clk is initialised, fix this by checking the return value for clk_get_rate() to make sure it is not zero. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
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