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Subject[PATCH net-next,1/1] hv_netvsc: call dump_rndis_message() only in netvsc debug mode
Date
From: Simon Xiao <sixiao@microsoft.com>

Signed-off-by: Simon Xiao <sixiao@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/net/hyperv/hyperv_net.h | 3 +++
drivers/net/hyperv/netvsc_drv.c | 8 ++++++++
drivers/net/hyperv/rndis_filter.c | 3 ++-
3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index a10b316..c9be35e 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -28,6 +28,9 @@
#include <linux/hyperv.h>
#include <linux/rndis.h>

+/* flag for netvsc debug mode */
+extern int debug_mode;
+
/* RSS related */
#define OID_GEN_RECEIVE_SCALE_CAPABILITIES 0x00010203 /* query only */
#define OID_GEN_RECEIVE_SCALE_PARAMETERS 0x00010204 /* query and set */
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index a3a9d38..7c41864 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -52,6 +52,10 @@ static int ring_size = 128;
module_param(ring_size, int, S_IRUGO);
MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");

+int debug_mode = 0;
+module_param(debug_mode, int, S_IRUGO);
+MODULE_PARM_DESC(debug_mode, "debug mode: zero(0) for non-debug mode; non-zero for debug mode");
+
static void do_set_multicast(struct work_struct *w)
{
struct net_device_context *ndevctx =
@@ -999,6 +1003,10 @@ static int __init netvsc_drv_init(void)
pr_info("Increased ring_size to %d (min allowed)\n",
ring_size);
}
+
+ if (debug_mode != 0)
+ pr_info("Run netvsc in debug mode");
+
return vmbus_driver_register(&netvsc_drv);
}

diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 0d92efe..a3f43f6 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -429,7 +429,8 @@ int rndis_filter_receive(struct hv_device *dev,

rndis_msg = pkt->data;

- dump_rndis_message(dev, rndis_msg);
+ if (debug_mode != 0)
+ dump_rndis_message(dev, rndis_msg);

switch (rndis_msg->ndis_msg_type) {
case RNDIS_MSG_PACKET:
--
1.8.5.2


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