It prevents ring_size being set to a too small value.
Reported-by: Jason Wang <jasow...@redhat.com>
Signed-off-by: Haiyang Zhang <haiya...@microsoft.com>
Reviewed-by: K. Y. Srinivasan <k...@microsoft.com>
---
drivers/net/hyperv/netvsc_drv.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 8e23c08..8c5a1c4 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -47,7 +47,7 @@ struct net_device_context {
struct work_struct work;
};
-
+#define RING_SIZE_MIN 64
static int ring_size = 128;
module_param(ring_size, int, S_IRUGO);
MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)");
@@ -518,6 +518,11 @@ static void __exit netvsc_drv_exit(void)
static int __init netvsc_drv_init(void)
{
+ if (ring_size < RING_SIZE_MIN) {
+ ring_size = RING_SIZE_MIN;
+ pr_info("Increased ring_size to %d (min allowed)\n",
+ ring_size);
+ }
return vmbus_driver_register(&netvsc_drv);
}
--
1.7.4.1
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