V4L/DVB (6209): pvrusb2: Better discriminate among device types

This is a bunch of cleanup in various places to improve behavior based
on actual device type being driven.  While this doesn't actually
affect operation with existing devices, it cleans things up so that it
will be easier / more deterministic when other devices are added.
Ideally we should make stuff like this table-driven, but for now this
is just a series of small incremental (read: safe) improvements.
Signed-off-by: NMike Isely <isely@pobox.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pvrusb2/pvrusb2-hdw.c

@@ -1143,6 +1143,13 @@ static int pvr2_upload_firmware1(struct pvr2_hdw *hdw)
 			fw_files_24xxx, ARRAY_SIZE(fw_files_24xxx)
 		},
 	};
+
+	if ((hdw->hdw_type >= ARRAY_SIZE(fw_file_defs)) ||
+	    (!fw_file_defs[hdw->hdw_type].lst)) {
+		hdw->fw1_state = FW1_STATE_OK;
+		return 0;
+	}
+
 	hdw->fw1_state = FW1_STATE_FAILED; // default result
 
 	trace_firmware("pvr2_upload_firmware1");
@@ -1224,6 +1231,11 @@ int pvr2_upload_firmware2(struct pvr2_hdw *hdw)
 		CX2341X_FIRM_ENC_FILENAME,
 	};
 
+	if ((hdw->hdw_type != PVR2_HDW_TYPE_29XXX) &&
+	    (hdw->hdw_type != PVR2_HDW_TYPE_24XXX)) {
+		return 0;
+	}
+
 	trace_firmware("pvr2_upload_firmware2");
 
 	ret = pvr2_locate_firmware(hdw,&fw_entry,"encoder",
@@ -1742,29 +1754,35 @@ static void pvr2_hdw_setup_low(struct pvr2_hdw *hdw)
 	unsigned int idx;
 	struct pvr2_ctrl *cptr;
 	int reloadFl = 0;
-	if (!reloadFl) {
-		reloadFl = (hdw->usb_intf->cur_altsetting->desc.bNumEndpoints
-			    == 0);
-		if (reloadFl) {
-			pvr2_trace(PVR2_TRACE_INIT,
-				   "USB endpoint config looks strange"
-				   "; possibly firmware needs to be loaded");
+	if ((hdw->hdw_type == PVR2_HDW_TYPE_29XXX) ||
+	    (hdw->hdw_type == PVR2_HDW_TYPE_24XXX)) {
+		if (!reloadFl) {
+			reloadFl =
+				(hdw->usb_intf->cur_altsetting->desc.bNumEndpoints
+				 == 0);
+			if (reloadFl) {
+				pvr2_trace(PVR2_TRACE_INIT,
+					   "USB endpoint config looks strange"
+					   "; possibly firmware needs to be"
+					   " loaded");
+			}
 		}
-	}
-	if (!reloadFl) {
-		reloadFl = !pvr2_hdw_check_firmware(hdw);
-		if (reloadFl) {
-			pvr2_trace(PVR2_TRACE_INIT,
-				   "Check for FX2 firmware failed"
-				   "; possibly firmware needs to be loaded");
+		if (!reloadFl) {
+			reloadFl = !pvr2_hdw_check_firmware(hdw);
+			if (reloadFl) {
+				pvr2_trace(PVR2_TRACE_INIT,
+					   "Check for FX2 firmware failed"
+					   "; possibly firmware needs to be"
+					   " loaded");
+			}
 		}
-	}
-	if (reloadFl) {
-		if (pvr2_upload_firmware1(hdw) != 0) {
-			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
-				   "Failure uploading firmware1");
+		if (reloadFl) {
+			if (pvr2_upload_firmware1(hdw) != 0) {
+				pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+					   "Failure uploading firmware1");
+			}
+			return;
 		}
-		return;
 	}
 	hdw->fw1_state = FW1_STATE_OK;
 
@@ -1773,17 +1791,25 @@ static void pvr2_hdw_setup_low(struct pvr2_hdw *hdw)
 	}
 	if (!pvr2_hdw_dev_ok(hdw)) return;
 
-	for (idx = 0; idx < pvr2_client_lists[hdw->hdw_type].cnt; idx++) {
-		request_module(pvr2_client_lists[hdw->hdw_type].lst[idx]);
+	if (hdw->hdw_type < ARRAY_SIZE(pvr2_client_lists)) {
+		for (idx = 0;
+		     idx < pvr2_client_lists[hdw->hdw_type].cnt;
+		     idx++) {
+			request_module(
+				pvr2_client_lists[hdw->hdw_type].lst[idx]);
+		}
 	}
 
-	pvr2_hdw_cmd_powerup(hdw);
-	if (!pvr2_hdw_dev_ok(hdw)) return;
+	if ((hdw->hdw_type == PVR2_HDW_TYPE_29XXX) ||
+	    (hdw->hdw_type == PVR2_HDW_TYPE_24XXX)) {
+		pvr2_hdw_cmd_powerup(hdw);
+		if (!pvr2_hdw_dev_ok(hdw)) return;
 
-	if (pvr2_upload_firmware2(hdw)){
-		pvr2_trace(PVR2_TRACE_ERROR_LEGS,"device unstable!!");
-		pvr2_hdw_render_useless(hdw);
-		return;
+		if (pvr2_upload_firmware2(hdw)){
+			pvr2_trace(PVR2_TRACE_ERROR_LEGS,"device unstable!!");
+			pvr2_hdw_render_useless(hdw);
+			return;
+		}
 	}
 
 	// This step MUST happen after the earlier powerup step.