Commit da943840 authored Jun 26, 2017 by Thierry Reding

soc/tegra: fuse: Warn if accessing unmapped registers



If the FUSE registers are accessed but the region is not mapped, warn
and return 0. This potentially catches hard to diagnose bugs because the
accesses happen before any kernel log output.

Signed-off-by: Thierry Reding <treding@nvidia.com>

parent 1f1607db

drivers/soc/tegra/fuse/fuse-tegra30.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,9 @@
		defined(CONFIG_ARCH_TEGRA_186_SOC)
		static u32 tegra30_fuse_read_early(struct tegra_fuse *fuse, unsigned int offset)
		{
		if (WARN_ON(!fuse->base))
		return 0;

		return readl_relaxed(fuse->base + FUSE_BEGIN + offset);
		}

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