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hyperv: Add a check for ring_size value

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It prevents ring_size being set to a too small value.

Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang 2012-07-25 08:08:41 +00:00 committed by David S. Miller
parent 4331debc51
commit fa85a6c29a
1 changed files with 6 additions and 1 deletions
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7
drivers/net/hyperv/netvsc_drv.c
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@ -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);
}