firmware: qcom: scm: smc: Narrow 'mempool' variable scope

Only part of the __scm_smc_call() function uses 'mempool' variable, so
narrow the scope to make it more readable.

Reviewed-by: Bartosz Golaszewski <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/20241209-qcom-scm-missing-barriers-and-all-sort-of-srap-v2-6-9061013c8d92@linaro.org
Signed-off-by: Bjorn Andersson <[email protected]>

Author: krzk

drivers/firmware/qcom/qcom_scm-smc.c

@@ -152,7 +152,6 @@ int __scm_smc_call(struct device *dev, const struct qcom_scm_desc *desc,
 		   enum qcom_scm_convention qcom_convention,
 		   struct qcom_scm_res *res, bool atomic)
 {
-	struct qcom_tzmem_pool *mempool = qcom_scm_get_tzmem_pool();
 	int arglen = desc->arginfo & 0xf;
 	int i, ret;
 	void *args_virt __free(qcom_tzmem) = NULL;
@@ -173,6 +172,8 @@ int __scm_smc_call(struct device *dev, const struct qcom_scm_desc *desc,
 		smc.args[i + SCM_SMC_FIRST_REG_IDX] = desc->args[i];
 
 	if (unlikely(arglen > SCM_SMC_N_REG_ARGS)) {
+		struct qcom_tzmem_pool *mempool = qcom_scm_get_tzmem_pool();
+
 		if (!mempool)
 			return -EINVAL;