interconnect: exynos: fix registration race
authorJohan Hovold <johan+linaro@kernel.org>
Mon, 6 Mar 2023 07:56:43 +0000 (08:56 +0100)
committerGeorgi Djakov <djakov@kernel.org>
Mon, 13 Mar 2023 19:13:48 +0000 (21:13 +0200)
commitc9e46ca612cfbb0cf890f7ae7389b742e90efe64
tree820ad654d7e9c361b63d8680afda7e6cea78892b
parent3aab264875bf3c915ea2517fae1eec213e0b4987
interconnect: exynos: fix registration race

The current interconnect provider registration interface is inherently
racy as nodes are not added until the after adding the provider. This
can specifically cause racing DT lookups to trigger a NULL-pointer
deference when either a NULL pointer or not fully initialised node is
returned from exynos_generic_icc_xlate().

Switch to using the new API where the provider is not registered until
after it has been fully initialised.

Fixes: 2f95b9d5cf0b ("interconnect: Add generic interconnect driver for Exynos SoCs")
Cc: stable@vger.kernel.org # 5.11
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20230306075651.2449-16-johan+linaro@kernel.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
drivers/interconnect/samsung/exynos.c