From fa85a6c29a493e8a574bf62a6349b38b591bf885 Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Wed, 25 Jul 2012 08:08:41 +0000 Subject: [PATCH] hyperv: Add a check for ring_size value It prevents ring_size being set to a too small value. Reported-by: Jason Wang Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/netvsc_drv.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 8e23c084c4a7..8c5a1c43c81d 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); } -- 2.20.1