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soc: qcom: rmtfs-mem: Validate that scm is available

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The scm device must be present in order for the rmtfs driver to
configure memory permissions for the rmtfs memory region, so check that
it is probed before continuing.

Cc: stable@vger.kernel.org
Fixes: fa65f80451 ("soc: qcom: rmtfs-mem: Add support for assigning memory to remote")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This commit is contained in:
Bjorn Andersson 2018-08-27 22:05:48 -07:00 committed by Andy Gross
parent 61a3bd1008
commit 137dc5843f
1 changed files with 5 additions and 0 deletions
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5
drivers/soc/qcom/rmtfs_mem.c
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@ -212,6 +212,11 @@ static int qcom_rmtfs_mem_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to parse qcom,vmid\n");
goto remove_cdev;
} else if (!ret) {
if (!qcom_scm_is_available()) {
ret = -EPROBE_DEFER;
goto remove_cdev;
}
perms[0].vmid = QCOM_SCM_VMID_HLOS;
perms[0].perm = QCOM_SCM_PERM_RW;
perms[1].vmid = vmid;