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path: root/drivers/net/hyperv/netvsc.c
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2013-04-29hyperv: Fix a compiler warning in netvsc_send()Haiyang Zhang1-1/+1
Fixed: warning: cast from pointer to integer of different size The Hyper-V hosts always use 64 bit request id. The guests can have 32 or 64 bit pointers which equal to the ulong type size. So we cast it to ulong type. And, assigning 32bit integer to 64 bit variable works fine. The VMBus returns the same id in the completion packet. But the value has no effect on the host side. Reported-by: kbuild test robot <[email protected]> Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-04-08hyperv: Fix RNDIS send_completion code pathHaiyang Zhang1-5/+12
In some cases, the VM_PKT_COMP message can arrive later than RNDIS completion message, which will free the packet memory. This may cause panic due to access to freed memory in netvsc_send_completion(). This patch fixes this problem by removing rndis_filter_send_request_completion() from the code path. The function was a no-op. Reported-by: Long Li <[email protected]> Tested-by: Long Li <[email protected]> Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-10-02hyperv: Report actual status in receive completion packetHaiyang Zhang1-6/+12
The existing code always reports NVSP_STAT_SUCCESS. This patch adds the mechanism to report failure when it happens. Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-10-02hyperv: Remove extra allocated space for recv_pkt_list elementsHaiyang Zhang1-3/+1
The receive code path doesn't use the page buffer, so remove the extra allocated space here. Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-08-03hyperv: Move wait completion msg code into rndis_filter_halt_device()Haiyang Zhang1-7/+0
We need to wait for send_completion msg before put_rndis_request() at the end of rndis_filter_halt_device(). Otherwise, netvsc_send_completion() may reference freed memory which is overwritten, and cause panic. Reported-by: Long Li <[email protected]> Reported-by: Jason Wang <[email protected]> Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-06-06Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-6/+6
2012-06-06drivers: net: Remove casts to same typeJoe Perches1-1/+1
Adding casts of objects to the same type is unnecessary and confusing for a human reader. For example, this cast: int y; int *p = (int *)&y; I used the coccinelle script below to find and remove these unnecessary casts. I manually removed the conversions this script produces of casts with __force, __iomem and __user. @@ type T; T *p; @@ - (T *)p + p Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-06-04net/hyperv: Use wait_event on outstanding sends during device removalHaiyang Zhang1-6/+6
Change the busy-waiting/udelay to wait_event on outstanding sends. Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-04-03net/hyperv: Add flow control based on hi/low watermarkHaiyang Zhang1-4/+37
In the existing code, we only stop queue when the ringbuffer is full, so the current packet has to be dropped or retried from upper layer. This patch stops the tx queue when available ringbuffer is below the low watermark. So the ringbuffer still has small amount of space available for the current packet. This will reduce the overhead of retries on sending. Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-03-12net/hyperv: Add support for vlan trunking from guestsHaiyang Zhang1-1/+2
With this feature, a Linux guest can now configure multiple vlans through a single synthetic NIC on Win8 Hyper-V host. Signed-off-by: Haiyang Zhang <[email protected]> Reviewed-by: K. Y. Srinivasan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-01-04net/hyperv: Add support for jumbo frame up to 64KBHaiyang Zhang1-3/+3
Allow the user set the MTU up to 65536 for Linux guests running on Hyper-V 2008 R2 or later. Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-01-04net/hyperv: Add NETVSP protocol version negotiationHaiyang Zhang1-27/+55
Automatically negotiate the highest protocol version mutually recognized by both host and guest. Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-01-04net/hyperv: Remove unnecessary kmap_atomic in netvsc driverHaiyang Zhang1-49/+4
__get_free_pages() doesn't return HI memory, so the memory is always mapped. kmap_atomic() is not necessary here. This patch removes the kmap_atomic() calls and related code for locking and page manipulation. Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2011-12-09net/hyperv: Fix the stop/wake queue mechanismHaiyang Zhang1-3/+11
The ring buffer is only used to pass meta data for outbound packets. The actual payload is accessed by DMA from the host. So the stop/wake queue mechanism based on counting and comparing number of pages sent v.s. number of pages in the ring buffer is wrong. Also, there is a race condition in the stop/wake queue calls, which can stop xmit queue forever. The new stop/wake queue mechanism is based on the actual bytes used by outbound packets in the ring buffer. The check for number of outstanding sends after stop queue prevents the race condition that can cause wake queue happening earlier than stop queue. Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> Reported-by: Long Li <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2011-12-01net/hyperv: Fix long lines in netvsc.cHaiyang Zhang1-3/+5
Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: K. Y. Srinivasan <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2011-11-29staging: hv: move hv_netvsc out of staging areaHaiyang Zhang1-0/+939
hv_netvsc has been reviewed on netdev mailing list on 6/09/2011. All recommended changes have been made. We are requesting to move it out of staging area. Signed-off-by: Haiyang Zhang <[email protected]> Signed-off-by: KY Srinivasan <[email protected]> Signed-off-by: Mike Sterling <[email protected]> Acked-by: Stephen Hemminger <[email protected]> Acked-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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