From: Andrew Schwartzmeyer Date: Wed, 19 Aug 2015 03:06:32 +0000 (-0700) Subject: hv_netvsc: Fix dereference of nvdev before check X-Git-Tag: v4.3-rc1~96^2~134 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=954591b9f3b43e7015bdd83acaa317658a9b7048;p=karo-tx-linux.git hv_netvsc: Fix dereference of nvdev before check Passes static analysis by Smatch. Signed-off-by: Andrew Schwartzmeyer Signed-off-by: David S. Miller --- diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index f3b9d3eb753b..2990024b90f9 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -777,14 +777,17 @@ static int netvsc_set_channels(struct net_device *net, struct hv_device *dev = net_device_ctx->device_ctx; struct netvsc_device *nvdev = hv_get_drvdata(dev); struct netvsc_device_info device_info; - const u32 num_chn = nvdev->num_chn; - const u32 max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); + u32 num_chn; + u32 max_chn; int ret = 0; bool recovering = false; if (!nvdev || nvdev->destroy) return -ENODEV; + num_chn = nvdev->num_chn; + max_chn = min_t(u32, nvdev->max_chn, num_online_cpus()); + if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) { pr_info("vRSS unsupported before NVSP Version 5\n"); return -EINVAL;