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drm/imx: imx-ldb: fix out of bounds array access warning
[ Upstream commit 33ce7f2 ] When CONFIG_OF is disabled, building with 'make W=1' produces warnings about out of bounds array access: drivers/gpu/drm/imx/imx-ldb.c: In function 'imx_ldb_set_clock.constprop': drivers/gpu/drm/imx/imx-ldb.c:186:8: error: array subscript -22 is below array bounds of 'struct clk *[4]' [-Werror=array-bounds] Add an error check before the index is used, which helps with the warning, as well as any possible other error condition that may be triggered at runtime. The warning could be fixed by adding a Kconfig depedency on CONFIG_OF, but Liu Ying points out that the driver may hit the out-of-bounds problem at runtime anyway. Signed-off-by: Arnd Bergmann <[email protected]> Reviewed-by: Liu Ying <[email protected]> Signed-off-by: Philipp Zabel <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
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