static int nvmem_validate_keepouts()

in core.c [629:680]

• 34 lines of code
• 9 McCabe index (conditional complexity)

static int nvmem_validate_keepouts(struct nvmem_device *nvmem)
{
	unsigned int cur = 0;
	const struct nvmem_keepout *keepout = nvmem->keepout;
	const struct nvmem_keepout *keepoutend = keepout + nvmem->nkeepout;

	while (keepout < keepoutend) {
		/* Ensure keepouts are sorted and don't overlap. */
		if (keepout->start < cur) {
			dev_err(&nvmem->dev,
				"Keepout regions aren't sorted or overlap.\n");

			return -ERANGE;
		}

		if (keepout->end < keepout->start) {
			dev_err(&nvmem->dev,
				"Invalid keepout region.\n");

			return -EINVAL;
		}

		/*
		 * Validate keepouts (and holes between) don't violate
		 * word_size constraints.
		 */
		if ((keepout->end - keepout->start < nvmem->word_size) ||
		    ((keepout->start != cur) &&
		     (keepout->start - cur < nvmem->word_size))) {

			dev_err(&nvmem->dev,
				"Keepout regions violate word_size constraints.\n");

			return -ERANGE;
		}

		/* Validate keepouts don't violate stride (alignment). */
		if (!IS_ALIGNED(keepout->start, nvmem->stride) ||
		    !IS_ALIGNED(keepout->end, nvmem->stride)) {

			dev_err(&nvmem->dev,
				"Keepout regions violate stride.\n");

			return -EINVAL;
		}

		cur = keepout->end;
		keepout++;
	}

	return 0;
}