linux-stable.git/drivers, branch linux-3.15.y

sunsab: Fix detection of BREAK on sunsab serial console

2014-08-14T01:51:50+00:00

[ Upstream commit fe418231b195c205701c0cc550a03f6c9758fd9e ]

Fix detection of BREAK on sunsab serial console: BREAK detection was only
performed when there were also serial characters received simultaneously.
To handle all BREAKs correctly, the check for BREAK and the corresponding
call to uart_handle_break() must also be done if count == 0, therefore
duplicate this code fragment and pull it out of the loop over the received
characters.

Patch applies to 3.16-rc6.

Signed-off-by: Christopher Alexander Tobias Schulze 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

bbc-i2c: Fix BBC I2C envctrl on SunBlade 2000

2014-08-14T01:51:49+00:00

[ Upstream commit 5cdceab3d5e02eb69ea0f5d8fa9181800baf6f77 ]

Fix regression in bbc i2c temperature and fan control on some Sun systems
that causes the driver to refuse to load due to the bbc_i2c_bussel resource not
being present on the (second) i2c bus where the temperature sensors and fan
control are located. (The check for the number of resources was removed when
the driver was ported to a pure OF driver in mid 2008.)

Signed-off-by: Christopher Alexander Tobias Schulze 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

macvlan: Initialize vlan_features to turn on offload support.

2014-08-14T01:51:49+00:00

[ Upstream commit 081e83a78db9b0ae1f5eabc2dedecc865f509b98 ]

Macvlan devices do not initialize vlan_features.  As a result,
any vlan devices configured on top of macvlans perform very poorly.
Initialize vlan_features based on the vlan features of the lower-level
device.

Signed-off-by: Vlad Yasevich 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

bna: fix performance regression

2014-08-14T01:51:48+00:00

[ Upstream commit c36c9d50cc6af5c5bfcc195f21b73f55520c15f9 ]

The recent commit "e29aa33 bna: Enable Multi Buffer RX" is causing
a performance regression. It does not properly update 'cmpl' pointer
at the end of the loop in NAPI handler bnad_cq_process(). The result is
only one packet / per NAPI-schedule is processed.

Signed-off-by: Ivan Vecera 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

inetpeer: get rid of ip_id_count

2014-08-14T01:51:48+00:00

[ Upstream commit 73f156a6e8c1074ac6327e0abd1169e95eb66463 ]

Ideally, we would need to generate IP ID using a per destination IP
generator.

linux kernels used inet_peer cache for this purpose, but this had a huge
cost on servers disabling MTU discovery.

1) each inet_peer struct consumes 192 bytes

2) inetpeer cache uses a binary tree of inet_peer structs,
   with a nominal size of ~66000 elements under load.

3) lookups in this tree are hitting a lot of cache lines, as tree depth
   is about 20.

4) If server deals with many tcp flows, we have a high probability of
   not finding the inet_peer, allocating a fresh one, inserting it in
   the tree with same initial ip_id_count, (cf secure_ip_id())

5) We garbage collect inet_peer aggressively.

IP ID generation do not have to be 'perfect'

Goal is trying to avoid duplicates in a short period of time,
so that reassembly units have a chance to complete reassembly of
fragments belonging to one message before receiving other fragments
with a recycled ID.

We simply use an array of generators, and a Jenkin hash using the dst IP
as a key.

ipv6_select_ident() is put back into net/ipv6/ip6_output.c where it
belongs (it is only used from this file)

secure_ip_id() and secure_ipv6_id() no longer are needed.

Rename ip_select_ident_more() to ip_select_ident_segs() to avoid
unnecessary decrement/increment of the number of segments.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

net: phy: re-apply PHY fixups during phy_register_device

2014-08-14T01:51:48+00:00

[ Upstream commit d92f5dec6325079c550889883af51db1b77d5623 ]

Commit 87aa9f9c61ad ("net: phy: consolidate PHY reset in phy_init_hw()")
moved the call to phy_scan_fixups() in phy_init_hw() after a software
reset is performed.

By the time phy_init_hw() is called in phy_device_register(), no driver
has been bound to this PHY yet, so all the checks in phy_init_hw()
against the PHY driver and the PHY driver's config_init function will
return 0. We will therefore never call phy_scan_fixups() as we should.

Fix this by calling phy_scan_fixups() and check for its return value to
restore the intended functionality.

This broke PHY drivers which do register an early PHY fixup callback to
intercept the PHY probing and do things like changing the 32-bits unique
PHY identifier when a pseudo-PHY address has been used, as well as
board-specific PHY fixups that need to be applied during driver probe
time.

Reported-by: Hauke Merthens 
Reported-by: Jonas Gorski 
Signed-off-by: Florian Fainelli 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

bnx2x: fix crash during TSO tunneling

2014-08-14T01:51:48+00:00

[ Upstream commit fe26566d8a05151ba1dce75081f6270f73ec4ae1 ]

When TSO packet is transmitted additional BD w/o mapping is used
to describe the packed. The BD needs special handling in tx
completion.

kernel: Call Trace:
kernel:   [] dump_stack+0x19/0x1b
kernel: [] warn_slowpath_common+0x61/0x80
kernel: [] warn_slowpath_fmt+0x5c/0x80
kernel: [] ? find_iova+0x4d/0x90
kernel: [] intel_unmap_page.part.36+0x142/0x160
kernel: [] intel_unmap_page+0x26/0x30
kernel: [] bnx2x_free_tx_pkt+0x157/0x2b0 [bnx2x]
kernel: [] bnx2x_tx_int+0xac/0x220 [bnx2x]
kernel: [] ? read_tsc+0x9/0x20
kernel: [] bnx2x_poll+0xbb/0x3c0 [bnx2x]
kernel: [] net_rx_action+0x15a/0x250
kernel: [] __do_softirq+0xf7/0x290
kernel: [] call_softirq+0x1c/0x30
kernel: [] do_softirq+0x55/0x90
kernel: [] irq_exit+0x115/0x120
kernel: [] do_IRQ+0x58/0xf0
kernel: [] common_interrupt+0x6d/0x6d
kernel:   [] ? clockevents_notify+0x127/0x140
kernel: [] ? cpuidle_enter_state+0x4f/0xc0
kernel: [] cpuidle_idle_call+0xc5/0x200
kernel: [] arch_cpu_idle+0xe/0x30
kernel: [] cpu_startup_entry+0xf5/0x290
kernel: [] start_secondary+0x265/0x27b
kernel: ---[ end trace 11aa7726f18d7e80 ]---

Fixes: a848ade408b ("bnx2x: add CSUM and TSO support for encapsulation protocols")
Reported-by: Yulong Pei 
Cc: Michal Schmidt 
Signed-off-by: Dmitry Kravkov 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

net: bcmgenet: correctly pad short packets

2014-08-14T01:51:47+00:00

[ Upstream commit 474ea9cafc459976827a477f2c30eaf6313cb7c1 ]

Packets shorter than ETH_ZLEN were not padded with zeroes, hence leaking
potentially sensitive information. This bug has been present since the
driver got accepted in commit 1c1008c793fa46703a2fee469f4235e1c7984333
("net: bcmgenet: add main driver file").

Signed-off-by: Florian Fainelli 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

drm/i915: Ignore VBT backlight presence check on HP Chromebook 14

2014-08-07T23:53:53+00:00

commit 724cb06fa9b1e1ffd98188275543fdb3b8eaca4f upstream.

commit c675949ec58ca50d5a3ae3c757892f1560f6e896
    drm/i915: do not setup backlight if not available according to VBT

caused a regression on the HP Chromebook 14 (with Celeron 2955U CPU),
which has a misconfigured VBT. Apply quirk to ignore the VBT backlight
presence check during backlight setup.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813
Signed-off-by: Scot Doyle 
Tested-by: Stefan Nagy 
Cc: Jani Nikula 
Cc: Daniel Vetter 
Signed-off-by: Daniel Vetter 
Signed-off-by: Greg Kroah-Hartman

staging: vt6655: Fix Warning on boot handle_irq_event_percpu.

2014-08-07T23:53:53+00:00

commit 6cff1f6ad4c615319c1a146b2aa0af1043c5e9f5 upstream.

WARNING: CPU: 0 PID: 929 at /home/apw/COD/linux/kernel/irq/handle.c:147 handle_irq_event_percpu+0x1d1/0x1e0()
irq 17 handler device_intr+0x0/0xa80 [vt6655_stage] enabled interrupts

Using spin_lock_irqsave appears to fix this.

Signed-off-by: Malcolm Priestley 
Signed-off-by: Greg Kroah-Hartman