diff mbox series

[5/6] firmware: qcom: scm: smc: Handle missing SCM device

Message ID 20241119-qcom-scm-missing-barriers-and-all-sort-of-srap-v1-5-7056127007a7@linaro.org (mailing list archive)
State New
Headers show
Series firmware: qcom: scm: Fixes for concurrency | expand

Commit Message

Krzysztof Kozlowski Nov. 19, 2024, 6:33 p.m. UTC 
Commit ca61d6836e6f ("firmware: qcom: scm: fix a NULL-pointer
dereference") makes it explicit that qcom_scm_get_tzmem_pool() can
return NULL, therefore its users should handle this.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 drivers/firmware/qcom/qcom_scm-smc.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/firmware/qcom/qcom_scm-smc.c b/drivers/firmware/qcom/qcom_scm-smc.c
index 2b4c2826f57251f25a1bc37c3b467dde28e1268b..3f10b23ec941b558e1d91761011776bb5c9d11b5 100644
--- a/drivers/firmware/qcom/qcom_scm-smc.c
+++ b/drivers/firmware/qcom/qcom_scm-smc.c
@@ -173,6 +173,9 @@  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)) {
+		if (!mempool)
+			return -EINVAL;
+
 		args_virt = qcom_tzmem_alloc(mempool,
 					     SCM_SMC_N_EXT_ARGS * sizeof(u64),
 					     flag);