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firmware: qcom: scm: smc: Handle missing SCM device

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[ Upstream commit 94f48ecf0a ]

Commit ca61d6836e ("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>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20241209-qcom-scm-missing-barriers-and-all-sort-of-srap-v2-5-9061013c8d92@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Krzysztof Kozlowski
2024-12-09 15:27:58 +01:00
committed by Greg Kroah-Hartman
parent fb3b0d1a19
commit cd955b7584
1 changed files with 3 additions and 0 deletions
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3
drivers/firmware/qcom/qcom_scm-smc.c
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@@ -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);