linux-toradex.git/net/wireless/core.h, branch v3.14.43

cfg80211: send scan results from work queue

2014-02-06T08:55:19+00:00

Due to the previous commit, when a scan finishes, it is in theory
possible to hit the following sequence:
 1. interface starts being removed
 2. scan is cancelled by driver and cfg80211 is notified
 3. scan done work is scheduled
 4. interface is removed completely, rdev->scan_req is freed,
    event sent to userspace but scan done work remains pending
 5. new scan is requested on another virtual interface
 6. scan done work runs, freeing the still-running scan

To fix this situation, hang on to the scan done message and block
new scans while that is the case, and only send the message from
the work function, regardless of whether the scan_req is already
freed from interface removal. This makes step 5 above impossible
and changes step 6 to be
 5. scan done work runs, sending the scan done message

As this can't work for wext, so we send the message immediately,
but this shouldn't be an issue since we still return -EBUSY.

Signed-off-by: Johannes Berg

Merge remote-tracking branch 'wireless-next/master' into mac80211-next

2013-12-16T10:23:45+00:00

cfg80211: don't "leak" uncompleted scans

2013-12-05T18:06:47+00:00

___cfg80211_scan_done() can be called in some cases
(e.g. on NETDEV_DOWN) before the low level driver
notified scan completion (which is indicated by
passing leak=true).

Clearing rdev->scan_req in this case is buggy, as
scan_done_wk might have already being queued/running
(and can't be flushed as it takes rtnl()).

If a new scan will be requested at this stage, the
scan_done_wk will try freeing it (instead of the
previous scan), and this will later result in
a use after free.

Simply remove the "leak" option, and replace it with
a standard WARN_ON.

An example backtrace after such crash:
Unable to handle kernel paging request at virtual address fffffee5
pgd = c0004000
[fffffee5] *pgd=9fdf6821, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] SMP ARM
PC is at cfg80211_scan_done+0x28/0xc4 [cfg80211]
LR is at __ieee80211_scan_completed+0xe4/0x2dc [mac80211]
[] (cfg80211_scan_done+0x28/0xc4 [cfg80211])
[] (__ieee80211_scan_completed+0xe4/0x2dc [mac80211])
[] (ieee80211_scan_work+0x94/0x4f0 [mac80211])
[] (process_one_work+0x1b0/0x4a8)
[] (worker_thread+0x138/0x37c)
[] (kthread+0xa4/0xb0)

Signed-off-by: Eliad Peller 
Signed-off-by: Johannes Berg

nl80211: vendor command support

2013-12-03T15:27:17+00:00

Add support for vendor-specific commands to nl80211. This is
intended to be used for really vendor-specific functionality
that can't be implemented in a generic fashion for any reason.
It's *NOT* intended to be used for any normal/generic feature
or any optimisations that could be implemented across drivers.

Currently, only vendor commands (with replies) are supported,
no dump operations or vendor-specific notifications.

Also add a function wdev_to_ieee80211_vif() to mac80211 which
is needed for mac80211-based drivers wanting to implement any
vendor commands.

Signed-off-by: Johannes Berg

Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

2013-12-02T19:25:38+00:00

cfg80211: aggregate mgmt_tx parameters into a struct

2013-12-02T10:51:52+00:00

Change cfg80211 and mac80211 to use cfg80211_mgmt_tx_params
struct to aggregate parameters for mgmt_tx functions.
This makes the functions' signatures less clumsy and allows
less painful parameters extension.

Signed-off-by: Andrei Otcheretianski 
[fix all other drivers]
Signed-off-by: Johannes Berg

cfg80211: DFS check chandef usable before CAC

2013-11-25T19:49:43+00:00

Check chandef we get in CAC request is usable for CAC.
All channels have to be DFS channels. Allow DFS_USABLE
and DFS_AVAILABLE channels mix. At least one channel
has to be DFS_USABLE (require CAC).

Signed-off-by: Janusz Dziedzic 
Reviewed-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless

2013-11-04T19:45:14+00:00

Conflicts:
	drivers/net/wireless/iwlwifi/pcie/drv.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2013-10-23T20:49:34+00:00

Conflicts:
	drivers/net/usb/qmi_wwan.c
	include/net/dst.h

Trivial merge conflicts, both were overlapping changes.

Signed-off-by: David S. Miller

net: misc: Remove extern from function prototypes

2013-10-19T23:12:11+00:00

There are a mix of function prototypes with and without extern
in the kernel sources.  Standardize on not using extern for
function prototypes.

Function prototypes don't need to be written with extern.
extern is assumed by the compiler.  Its use is as unnecessary as
using auto to declare automatic/local variables in a block.

Signed-off-by: Joe Perches 
Signed-off-by: David S. Miller