qcacmn: Avoid crash when wmi max pending commands are reached

If WMI max pending commands are reached and UMAC reset is in progress then
add the WMI pending command to host SW queue instead of crashing. The
reason is FW will not reap the WMI commands from the CE ring when umac
reset is in progress. Hence, add the pending WMI command to host SW ring.

Change-Id: I871147a80669a88875b3f6891bd0b0a56b92733b
CRs-Fixed: 3502217

wmi/src/wmi_unified.c

@@ -42,6 +42,10 @@
 #include "wmi_filtered_logging.h"
 #include <wmi_hang_event.h>
 
+#ifdef DP_UMAC_HW_RESET_SUPPORT
+#include <cdp_txrx_ctrl.h>
+#endif
+
 /* This check for CONFIG_WIN temporary added due to redeclaration compilation
 error in MCL. Error is caused due to inclusion of wmi.h in wmi_unified_api.h
 which gets included here through ol_if_athvar.h. Eventually it is expected that
@@ -2071,6 +2075,42 @@ static inline void wmi_set_system_pm_pkt_tag(uint16_t *htc_tag, wmi_buf_t buf,
 }
 #endif
 
+#ifdef DP_UMAC_HW_RESET_SUPPORT
+/**
+ * wmi_unified_is_max_pending_commands_reached() - API to check if WMI max
+ * pending commands are reached.
+ * @wmi_handle: Pointer to WMI handle
+ *
+ * Return: If umac reset is in progress and max wmi pending commands are reached
+ * then return false. The reason is FW will not reap the WMI commands from CE
+ * ring when umac reset is in progress. Hence, all the pending WMI command to
+ * host SW ring.
+ */
+static inline bool
+wmi_unified_is_max_pending_commands_reached(wmi_unified_t wmi_handle)
+{
+	ol_txrx_soc_handle soc_txrx_handle;
+
+	soc_txrx_handle = (ol_txrx_soc_handle)wlan_psoc_get_dp_handle(
+			wmi_handle->soc->wmi_psoc);
+	if (!soc_txrx_handle) {
+		wmi_err("psoc handle is NULL");
+		return false;
+	}
+
+	return ((qdf_atomic_read(&wmi_handle->pending_cmds) >=
+			wmi_handle->wmi_max_cmds) &&
+		!cdp_umac_reset_is_inprogress(soc_txrx_handle));
+}
+#else
+static inline bool
+wmi_unified_is_max_pending_commands_reached(wmi_unified_t wmi_handle)
+{
+	return (qdf_atomic_read(&wmi_handle->pending_cmds) >=
+			wmi_handle->wmi_max_cmds);
+}
+#endif
+
 QDF_STATUS wmi_unified_cmd_send_fl(wmi_unified_t wmi_handle, wmi_buf_t buf,
 				   uint32_t len, uint32_t cmd_id,
 				   const char *func, uint32_t line)
@@ -2129,8 +2169,7 @@ QDF_STATUS wmi_unified_cmd_send_fl(wmi_unified_t wmi_handle, wmi_buf_t buf,
 	WMI_SET_FIELD(qdf_nbuf_data(buf), WMI_CMD_HDR, COMMANDID, cmd_id);
 
 	qdf_atomic_inc(&wmi_handle->pending_cmds);
-	if (qdf_atomic_read(&wmi_handle->pending_cmds) >=
-			wmi_handle->wmi_max_cmds) {
+	if (wmi_unified_is_max_pending_commands_reached(wmi_handle)) {
 		wmi_dump_last_cmd_rec_info(wmi_handle);
 		wmi_nofl_err("hostcredits = %d",
 			     wmi_get_host_credits(wmi_handle));