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path: root/target/linux/x86/patches-5.15/120-hwrng-geode-fix-accessing-registers.patch
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* x86: geode: fix hwrng register accessesJonas Gorski2023-09-141-0/+47
When the membase and pci_dev pointer were moved to a new struct in priv, the actual membase users were left untouched, and they started reading out arbitrary memory behind the struct instead of registers. This unfortunately turned the RNG into a constant number generator, depending on the content of what was at that offset. To fix this, update geode_rng_data_{read,present}() to also get the membase via amd_geode_priv, and properly read from the right addresses again. Closes #13417. Reported-by: Timur I. Davletshin <timur.davletshin@gmail.com> Tested-by: Timur I. Davletshin <timur.davletshin@gmail.com> Suggested-by: Jo-Philipp Wich <jo@mein.io> Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> (cherry picked from commit 09d13cd8d87cc50fde67bbe81c6cca4b799b2724)