Avoid having to look up a dummy item from SMEM to detect if it is
already available or if we need to defer probing.
Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
Signed-off-by: Stephan Gerhold <stephan@xxxxxxxxxxx>
---
drivers/soc/qcom/smem.c | 11 +++++++++++
include/linux/soc/qcom/smem.h | 1 +
2 files changed, 12 insertions(+)
diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index b0d59e815c3b..29193151cf4c 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -359,6 +359,17 @@ static struct qcom_smem *__smem;
/* Timeout (ms) for the trylock of remote spinlocks */
#define HWSPINLOCK_TIMEOUT 1000
+/**
+ * qcom_smem_is_available() - Check if SMEM is available
+ *
+ * Return: true if SMEM is available, false otherwise.
+ */
+bool qcom_smem_is_available(void)
+{
+ return !!__smem;
+}
+EXPORT_SYMBOL(qcom_smem_is_available);
+
static int qcom_smem_alloc_private(struct qcom_smem *smem,
struct smem_partition *part,
unsigned item,
diff --git a/include/linux/soc/qcom/smem.h b/include/linux/soc/qcom/smem.h
index 223db6a9c733..a36a3b9d4929 100644
--- a/include/linux/soc/qcom/smem.h
+++ b/include/linux/soc/qcom/smem.h
@@ -4,6 +4,7 @@
#define QCOM_SMEM_HOST_ANY -1
+bool qcom_smem_is_available(void);
int qcom_smem_alloc(unsigned host, unsigned item, size_t size);
void *qcom_smem_get(unsigned host, unsigned item, size_t *size);
--
2.40.1
