The NETPOLL API requires that interrupts remain disabled in
netpoll_send_skb(). The use of "A functions set" in the NETPOLL API
callbacks causes the interrupts to get enabled and can lead to kernel
instability.

The solution is to use "B functions set" to prevent the irqs from
getting enabled while in netpoll_send_skb().

A functions set:
local_irq_disable()/local_irq_enable()
spin_lock_irq()/spin_unlock_irq()
spin_trylock_irq()/spin_unlock_irq()

B functions set:
local_irq_save()/local_irq_restore()
spin_lock_irqsave()/spin_unlock_irqrestore()
spin_trylock_irqsave()/spin_unlock_irqrestore()

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If the length is less or equal to frag_prefix_size in the first iteration
we write skb_frags_rx[-1] and read from priv->frag_info[-1]

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (47 commits)
  ehea: Fix napi list corruption on ifconfig down
  igbvf: Allow VF driver to correctly recognize failure to set mac
  3c59x: Fix build failure with gcc 3.2
  sky2: Avoid transmits during sky2_down()
  iwlagn: do not send key clear commands when rfkill enabled
  libertas: Read buffer overflow
  drivers/net/wireless: introduce missing kfree
  drivers/net/wireless/iwlwifi: introduce missing kfree
  zd1211rw: fix unaligned access in zd_mac_rx
  cfg80211: fix regression on beacon world roaming feature
  cfg80211: add two missing NULL pointer checks
  ixgbe: Patch to modify 82598 PCIe completion timeout values
  bluetooth: rfcomm_init bug fix
  mlx4_en: Fix double pci unmapping.
  mISDN: Fix handling of receive buffer size in L1oIP
  pcnet32: VLB support fixes
  pcnet32: remove superfluous NULL pointer check in pcnet32_probe1()
  net: restore the original spinlock to protect unicast list
  netxen: fix coherent dma mask setting
  mISDN: Read buffer overflow
  ...

In cases of fragmented skb, with the data pointers being wrapped around
the TX buffer, the completion handling code would not forward the data
pointer and the firs fragment was unmapped several times, while others
were not unmapped at all.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (37 commits)
  sky2: Avoid races in sky2_down
  drivers/net/mlx4: Adjust constant
  drivers/net: Move a dereference below a NULL test
  drivers/net: Move a dereference below a NULL test
  connector: maintainer/mail update.
  USB host CDC Phonet network interface driver
  macsonic, jazzsonic: fix oops on module unload
  macsonic: move probe function to .devinit.text
  can: switch carrier on if device was stopped while in bus-off state
  can: restart device even if dev_alloc_skb() fails
  can: sja1000: remove duplicated includes
  New device ID for sc92031 [1088:2031]
  3c589_cs: re-initialize the multicast in the tc589_reset
  Fix error return for setsockopt(SO_TIMESTAMPING)
  netxen: fix thermal check and shutdown
  netxen: fix deadlock on dev close
  netxen: fix context deletion sequence
  net: Micrel KS8851 SPI network driver
  tcp: Use correct peer adr when copying MD5 keys
  tcp: Fix MD5 signature checking on IPv4 mapped sockets
  ...

The values in the advertising field are typically ADVERTISED_xxx, not
SUPPORTED_xxx.  Both SUPPORTED_10000baseT_Full and
ADVERTISED_1000baseT_Full have the same value.

The semantic match that finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
struct ethtool_cmd E;
@@
*E.advertising = SUPPORTED_10000baseT_Full
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

MT26468 (PCI ID 0x6764) devices can expose multiple physical
functions.  The current driver only handles the primary physical
function.  For other functions, the QUERY_FW firmware command will
fail with the CMD_STAT_MULTI_FUNC_REQ error code.  Don't try to drive
such devices, but print a message saying the driver is skipping those
devices rather than just "QUERY_FW command failed."

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>

[ Rather than keeping unsupported devices bound to the driver, simply
  print a more informative error message and exit - Roland ]

Signed-off-by: Roland Dreier <rolandd@cisco.com>

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  RDMA: Add __init/__exit macros to addr.c and cma.c
  IB/ehca: Bump version number
  mlx4_core: Fix dma_sync_single_for_cpu() with matching for_device() calls
  IB/mthca: Replace dma_sync_single() use with proper functions
  RDMA/nes: Fix FIN state handling under error conditions
  RDMA/nes: Fix max_qp_init_rd_atom returned from query device
  IB/ehca: Ensure that guid_entry index is not negative
  IB/ehca: Tolerate dynamic memory operations before driver load

Commit 5d23a1d2 ("net: replace dma_sync_single with
dma_sync_single_for_cpu") replaced uses of the deprectated function
dma_sync_single() with calls to dma_sync_single_for_cpu().  However,
to be correct, the code should do a sync for_cpu() before touching the
memory and for_device() after it's done.

Signed-off-by: Roland Dreier <rolandd@cisco.com>