From bc6491027d370304c19fdfe853fdebabc235be4d Mon Sep 17 00:00:00 2001
From: Madalin Bucur <madalin.bucur@freescale.com>
Date: Mon, 25 Aug 2014 17:29:26 +0300
Subject: dpaa_eth: check qman_query_cgr return value

Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com>
Change-Id: I21558e105b5c3092e96b7e98b570e5613e8bc771
Reviewed-on: http://git.am.freescale.net:8181/17399
Reviewed-by: Cristian Bercaru <cristian.bercaru@freescale.com>

diff --git a/drivers/net/ethernet/freescale/dpa/dpaa_debugfs.c b/drivers/net/ethernet/freescale/dpa/dpaa_debugfs.c
index a5665ac..1f22bd7 100644
--- a/drivers/net/ethernet/freescale/dpa/dpaa_debugfs.c
+++ b/drivers/net/ethernet/freescale/dpa/dpaa_debugfs.c
@@ -135,16 +135,21 @@ static int dpa_debugfs_show(struct seq_file *file, void *offset)
 	seq_printf(file, "Device has been congested for %d ms.\n",
 		jiffies_to_msecs(priv->cgr_data.congested_jiffies));
 
-	qman_query_cgr(&priv->cgr_data.cgr, &query_cgr);
-	seq_printf(file, "CGR id %d avg count: %llu\n",
-		priv->cgr_data.cgr.cgrid, qm_mcr_querycgr_a_get64(&query_cgr));
-	seq_printf(file, "Device entered congestion %u times. ",
-			priv->cgr_data.cgr_congested_count);
-	seq_printf(file, "Current congestion state is: %s.\n",
-		query_cgr.cgr.cs ? "congested" : "not congested");
-	/* Reset congestion stats (like QMan CGR API does) */
-	priv->cgr_data.congested_jiffies = 0;
-	priv->cgr_data.cgr_congested_count = 0;
+	if (qman_query_cgr(&priv->cgr_data.cgr, &query_cgr) != 0) {
+		seq_printf(file, "CGR id %d - failed to query values\n",
+			   priv->cgr_data.cgr.cgrid);
+	} else {
+		seq_printf(file, "CGR id %d avg count: %llu\n",
+			   priv->cgr_data.cgr.cgrid,
+			   qm_mcr_querycgr_a_get64(&query_cgr));
+		seq_printf(file, "Device entered congestion %u times. ",
+			   priv->cgr_data.cgr_congested_count);
+		seq_printf(file, "Current congestion state is: %s.\n",
+			   query_cgr.cgr.cs ? "congested" : "not congested");
+		/* Reset congestion stats (like QMan CGR API does) */
+		priv->cgr_data.congested_jiffies = 0;
+		priv->cgr_data.cgr_congested_count = 0;
+	}
 
 	/* Rx Errors demultiplexing */
 	seq_puts(file, "\nDPA RX Errors:\nCPU        dma err  phys err");
-- 
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