* 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
*
* 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;
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)
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;
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_ */