diff options
| author | Haiyang Zhang <haiyangz@microsoft.com> | 2016-03-23 17:43:10 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-23 19:38:55 +0100 |
| commit | 9efc2f7dcd06e04d7b6a3032ae65bfd628b1aebe (patch) | |
| tree | b1177296ef91d34aadc8307915de09240e76eaf9 /drivers/net/hyperv | |
| parent | hv_netvsc: Fix accessing freed memory in netvsc_change_mtu() (diff) | |
| download | linux-9efc2f7dcd06e04d7b6a3032ae65bfd628b1aebe.tar.xz linux-9efc2f7dcd06e04d7b6a3032ae65bfd628b1aebe.zip | |
hv_netvsc: Fix the array sizes to be max supported channels
The VRSS_CHANNEL_MAX is the max number of channels supported by Hyper-V
hosts. We use it for the related array sizes instead of using NR_CPUS,
which may be set to several thousands.
This patch reduces possible memory allocation failures.
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>
Diffstat (limited to 'drivers/net/hyperv')
| -rw-r--r-- | drivers/net/hyperv/hyperv_net.h | 7 | ||||
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 4 |
2 files changed, 6 insertions, 5 deletions
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index b4c68783dfc3..8b3bd8ecd1c4 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -619,6 +619,7 @@ struct nvsp_message { #define NETVSC_PACKET_SIZE 4096 #define VRSS_SEND_TAB_SIZE 16 +#define VRSS_CHANNEL_MAX 64 #define RNDIS_MAX_PKT_DEFAULT 8 #define RNDIS_PKT_ALIGN_DEFAULT 8 @@ -700,13 +701,13 @@ struct netvsc_device { struct net_device *ndev; - struct vmbus_channel *chn_table[NR_CPUS]; + struct vmbus_channel *chn_table[VRSS_CHANNEL_MAX]; u32 send_table[VRSS_SEND_TAB_SIZE]; u32 max_chn; u32 num_chn; spinlock_t sc_lock; /* Protects num_sc_offered variable */ u32 num_sc_offered; - atomic_t queue_sends[NR_CPUS]; + atomic_t queue_sends[VRSS_CHANNEL_MAX]; /* Holds rndis device info */ void *extension; @@ -718,7 +719,7 @@ struct netvsc_device { /* The sub channel callback buffer */ unsigned char *sub_cb_buf; - struct multi_send_data msd[NR_CPUS]; + struct multi_send_data msd[VRSS_CHANNEL_MAX]; u32 max_pkt; /* max number of pkt in one send, e.g. 8 */ u32 pkt_align; /* alignment bytes, e.g. 8 */ diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 47d07c576a34..d5a54da5d9c8 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -1113,9 +1113,9 @@ int rndis_filter_device_add(struct hv_device *dev, if (ret || rsscap.num_recv_que < 2) goto out; - num_rss_qs = min(device_info->max_num_vrss_chns, rsscap.num_recv_que); + net_device->max_chn = min_t(u32, VRSS_CHANNEL_MAX, rsscap.num_recv_que); - net_device->max_chn = rsscap.num_recv_que; + num_rss_qs = min(device_info->max_num_vrss_chns, net_device->max_chn); /* * We will limit the VRSS channels to the number CPUs in the NUMA node |