hv-net: add more debug prints

Bug 3283221 

Change-Id: I038834db630c6751f03f8c1114ba9b9181fa2201
Signed-off-by: Achal Verma <achalv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2516881
Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com>
Reviewed-by: Rahul Jain (SW-TEGRA) <rahuljain@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2575307
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

2 files changed, 17 insertions, 7 deletions

diff --git a/drivers/net/tegra_hv_net.c b/drivers/net/tegra_hv_net.c
index 1accd6bb6..f17370c38 100644
--- a/drivers/net/tegra_hv_net.c
+++ b/drivers/net/tegra_hv_net.c
@@ -3,7 +3,7 @@
  *
  * Very loosely based on virtio_net.c
  *
- * Copyright (C) 2014-2020, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (C) 2014-2021, NVIDIA CORPORATION. All rights reserved.
  *
  * This file is licensed under the terms of the GNU General Public License
  * version 2.  This program is licensed "as is" without any warranty of any
@@ -191,9 +191,10 @@ static void *tegra_hv_net_xmit_get_buffer(struct tegra_hv_net *hvn)
                         msecs_to_jiffies(hvn->max_tx_delay));
                 if (ret <= 0) {
                         net_warn_ratelimited(
-                                "%s: timed out after %u ms\n",
+                                "%s: Error getting IVC buffer, timed out after" \
+                                " %u ms ERROR %ld \n",
                                 hvn->ndev->name,
-                                hvn->max_tx_delay);
+                                hvn->max_tx_delay, PTR_ERR(p));
                 }
         }
 
@@ -224,7 +225,7 @@ static void tegra_hv_net_xmit_work(struct kthread_work *work)
                 ret = skb_linearize(skb);
                 if (ret != 0) {
                         netdev_err(hvn->ndev,
-                                "%s: skb_linearize error=%d\n",
+                                "%s: skb_linearize failed error=%d\n",
                                 __func__, ret);
 
                         dk = dk_linearize;
@@ -246,6 +247,9 @@ static void tegra_hv_net_xmit_work(struct kthread_work *work)
                         p = tegra_hv_net_xmit_get_buffer(hvn);
                         if (IS_ERR(p)) {
                                 dk = dk_wq;
+                                netdev_err(hvn->ndev,
+                                "tegra_hv_net_xmit_get_buffer failed" \
+                                " error=%ld\n", PTR_ERR(p));
                                 goto drop;
                         }
 
diff --git a/drivers/platform/tegra/tegra-ivc.c b/drivers/platform/tegra/tegra-ivc.c
index 13c9e0358..1b1bc605e 100644
--- a/drivers/platform/tegra/tegra-ivc.c
+++ b/drivers/platform/tegra/tegra-ivc.c
@@ -1,7 +1,7 @@
 /*
  * Inter-VM Communication
  *
- * Copyright (C) 2014-2016, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (C) 2014-2021, NVIDIA CORPORATION. All rights reserved.
  *
  * This file is licensed under the terms of the GNU General Public License
  * version 2.  This program is licensed "as is" without any warranty of any
@@ -563,8 +563,11 @@ EXPORT_SYMBOL(tegra_ivc_write_poke);
 void *tegra_ivc_write_get_next_frame(struct ivc *ivc)
 {
         int result = ivc_check_write(ivc);
-        if (result)
+        if (result) {
+                printk_ratelimited("%s :ivc_check_write failed, error %d\n",
+                                __func__, result);
                 return ERR_PTR(result);
+        }
 
         return ivc_frame_pointer(ivc, ivc->tx_channel, ivc->w_pos);
 }
@@ -574,8 +577,11 @@ EXPORT_SYMBOL(tegra_ivc_write_get_next_frame);
 int tegra_ivc_write_advance(struct ivc *ivc)
 {
         int result = ivc_check_write(ivc);
-        if (result)
+        if (result) {
+                printk_ratelimited("%s: ivc_check_write failed , error %d\n",
+                __func__, result);
                 return result;
+        }
 
         ivc_flush_frame(ivc, ivc->tx_handle, ivc->w_pos, 0, ivc->frame_size);