diff --git a/drivers/firmware/meson/meson_sm.c b/drivers/firmware/meson/meson_sm.c
index b0d254930ed3..5f30a5774e57 100644
--- a/drivers/firmware/meson/meson_sm.c
+++ b/drivers/firmware/meson/meson_sm.c
@@ -127,6 +127,7 @@ EXPORT_SYMBOL(meson_sm_call);
  * meson_sm_call_read - retrieve data from secure-monitor
  *
  * @buffer:	Buffer to store the retrieved data
+ * @bsize:	Size of the buffer
  * @cmd_index:	Index of the SMC32 function ID
  * @arg0:	SMC32 Argument 0
  * @arg1:	SMC32 Argument 1
@@ -136,8 +137,8 @@ EXPORT_SYMBOL(meson_sm_call);
  *
  * Return:	size of read data on success, a negative value on error
  */
-int meson_sm_call_read(void *buffer, unsigned int cmd_index, u32 arg0,
-		       u32 arg1, u32 arg2, u32 arg3, u32 arg4)
+int meson_sm_call_read(void *buffer, unsigned int bsize, unsigned int cmd_index,
+		       u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4)
 {
 	u32 size;
 
@@ -147,10 +148,13 @@ int meson_sm_call_read(void *buffer, unsigned int cmd_index, u32 arg0,
 	if (!fw.chip->cmd_shmem_out_base)
 		return -EINVAL;
 
+	if (bsize > fw.chip->shmem_size)
+		return -EINVAL;
+
 	if (meson_sm_call(cmd_index, &size, arg0, arg1, arg2, arg3, arg4) < 0)
 		return -EINVAL;
 
-	if (!size || size > fw.chip->shmem_size)
+	if (!size || size > bsize)
 		return -EINVAL;
 
 	if (buffer)
diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c
index f207c3b10482..70bfc9839bb2 100644
--- a/drivers/nvmem/meson-efuse.c
+++ b/drivers/nvmem/meson-efuse.c
@@ -27,7 +27,7 @@ static int meson_efuse_read(void *context, unsigned int offset,
 	u8 *buf = val;
 	int ret;
 
-	ret = meson_sm_call_read(buf, SM_EFUSE_READ, offset,
+	ret = meson_sm_call_read(buf, bytes, SM_EFUSE_READ, offset,
 				 bytes, 0, 0, 0);
 	if (ret < 0)
 		return ret;
diff --git a/include/linux/firmware/meson/meson_sm.h b/include/linux/firmware/meson/meson_sm.h
index 8e953c6f394a..37a5eaea69dd 100644
--- a/include/linux/firmware/meson/meson_sm.h
+++ b/include/linux/firmware/meson/meson_sm.h
@@ -25,7 +25,7 @@ int meson_sm_call(unsigned int cmd_index, u32 *ret, u32 arg0, u32 arg1,
 		  u32 arg2, u32 arg3, u32 arg4);
 int meson_sm_call_write(void *buffer, unsigned int b_size, unsigned int cmd_index,
 			u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4);
-int meson_sm_call_read(void *buffer, unsigned int cmd_index, u32 arg0, u32 arg1,
-		       u32 arg2, u32 arg3, u32 arg4);
+int meson_sm_call_read(void *buffer, unsigned int bsize, unsigned int cmd_index,
+		       u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4);
 
 #endif /* _MESON_SM_FW_H_ */