esoc: Notify mdm-helper about the modem's error fatal

There is no way for the mdm-helper to know that the
modem has crashed to take necessary action.
Hence, added the support that sends a notification to the
user-space, through IOCTL, as and when the modem sends an
error fatal interrupt to the driver.

Change-Id: I0a596763b310641d4c9e93d03690ba96162515ff
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>

drivers/esoc/esoc-mdm-drv.c

@@ -169,6 +169,7 @@ static int mdm_subsys_shutdown(const struct subsys_desc *crashed_subsys,
 			 */
 			return 0;
 
+		esoc_clink_queue_request(ESOC_REQ_CRASH_SHUTDOWN, esoc_clink);
 		esoc_client_link_power_off(esoc_clink, true);
 
 		ret = clink_ops->cmd_exe(ESOC_PREPARE_DEBUG,

include/uapi/linux/esoc_ctrl.h

@@ -26,6 +26,7 @@ struct esoc_link_data {
 #define ESOC_GET_LINK_ID	_IOWR(ESOC_CODE, 9, struct esoc_link_data)
 
 #define ESOC_REQ_SEND_SHUTDOWN	ESOC_REQ_SEND_SHUTDOWN
+#define ESOC_REQ_CRASH_SHUTDOWN ESOC_REQ_CRASH_SHUTDOWN
 
 enum esoc_evt {
 	ESOC_RUN_STATE = 0x1,
@@ -67,6 +68,7 @@ enum esoc_req {
 	ESOC_REQ_DEBUG,
 	ESOC_REQ_SHUTDOWN,
 	ESOC_REQ_SEND_SHUTDOWN,
+	ESOC_REQ_CRASH_SHUTDOWN,
 };
 
 #ifdef __KERNEL__