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Commit fa85a6c2 authored by Haiyang Zhang's avatar Haiyang Zhang Committed by David S. Miller
Browse files

hyperv: Add a check for ring_size value 



It prevents ring_size being set to a too small value.

Reported-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4331debc

drivers/net/hyperv/netvsc_drv.c

+6 −1
Original line number Diff line number Diff line
@@ -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);

}