[PATCH 05/10] staging: hv: re-order the code in netvsc_probe()
From: Haiyang Zhang <haiyangz@microsoft.com>
Date: 2011-09-01 19:36:40
Also in:
lkml
Subsystem:
staging subsystem, the rest · Maintainers:
Greg Kroah-Hartman, Linus Torvalds
Re-order the code in netvsc_probe() to prevent a guest crash caused by packets possibly received from NetVSP before call to register_netdev(). Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> --- drivers/staging/hv/netvsc_drv.c | 32 +++++++++++++++++--------------- 1 files changed, 17 insertions(+), 15 deletions(-)
diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index e6513be..b49a08f 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c@@ -348,19 +348,6 @@ static int netvsc_probe(struct hv_device *dev) dev_set_drvdata(&dev->device, net); INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_send_garp); - /* Notify the netvsc driver of the new device */ - device_info.ring_size = ring_size; - ret = rndis_filter_device_add(dev, &device_info); - if (ret != 0) { - free_netdev(net); - dev_set_drvdata(&dev->device, NULL); - return ret; - } - - netif_carrier_on(net); - - memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); - net->netdev_ops = &device_ops; /* TODO: Add GSO and Checksum offload */
@@ -372,11 +359,26 @@ static int netvsc_probe(struct hv_device *dev) ret = register_netdev(net); if (ret != 0) { - /* Remove the device and release the resource */ - rndis_filter_device_remove(dev); + pr_err("Unable to register netdev.\n"); free_netdev(net); + goto out; } + /* Notify the netvsc driver of the new device */ + device_info.ring_size = ring_size; + ret = rndis_filter_device_add(dev, &device_info); + if (ret != 0) { + netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); + unregister_netdev(net); + free_netdev(net); + dev_set_drvdata(&dev->device, NULL); + return ret; + } + memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN); + + netif_carrier_on(net); + +out: return ret; }
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1.6.3.2