A link downgrade can race with link up. Avoid the race
in two ways. First, by having the downgrade application logic
take the link state mutex for all of its checking. Second, by
waiting for the link to move out of the going up state.
Reviewed-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NDean Luick <dean.luick@intel.com>
Signed-off-by: NJubin John <jubin.john@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Using fence->status to determine whether or not there are callbacks
remaining on the sync_fence is racy since fence->status may have been
decremented to 0 on another CPU before fence_check_cb_func() has
completed.  By unconditionally calling fence_remove_callback() for each
fence in the sync_fence, we guarantee that each callback has either
completed (since fence_remove_callback() grabs the fence lock) or been
removed.
Signed-off-by: NAndrew Bresticker <abrestic@chromium.org>
Signed-off-by: NDmitry Torokhov <dtor@chromium.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This allows users of dma fences to create a android fence.

v2: Added kerneldoc. (Tvrtko Ursulin).

v4: Updated comments from review feedback my Maarten.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: devel@driverdev.osuosl.org
Cc: Riley Andrews <riandrews@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Tested-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Debug output assumes all sync points are built on top of Android sync points
and when we start creating them from dma-fences will NULL ptr deref unless
taught about this.

v4: Corrected patch ownership.
Signed-off-by: NMaarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: NTvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: devel@driverdev.osuosl.org
Cc: Riley Andrews <riandrews@android.com>
Cc: Arve Hjønnevåg <arve@android.com>
Reviewed-by: NJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

when ashmem init fails, destroy the slabs, leave
no garbage.
Signed-off-by: NWenwei Tao <ww.tao0320@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add ION node to enable ION on hi6220 SoC platform
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NYu Dongbin <yudongbin@hisilicon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Add ion support for hi6220 SoC platform.
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NYu Dongbin <yudongbin@hisilicon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation for hi6220 SoC ION node
Signed-off-by: NChen Feng <puck.chen@hisilicon.com>
Signed-off-by: NYu Dongbin <yudongbin@hisilicon.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Set tx_buffer to NULL not to free again the memory that is already freed,
which could cause system crash when device is failed.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We are using hif_drv of vif, so it needs to be set before it is used.
Set hif_drv to vif->hifdrv soon after it is allocated.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

vif has wilc in it's members so no need to have wilc in host_if_drv.
It is redundant so just remove it and use wilc of vif.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch remove drv of struct host_if msg and it's related codes.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch remove unused functions add_handler_in_list and
remove_handler_in_list, and it's related global variable wfidrv_list and codes.
label fail_timer_2 and it's codes are removed since label is not used anymore.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

To use wilc_get_vif_idx instead of the last get_id_from_handler, join_req_drv
needs to be changed it's type with wilc_vif and name as well.
As a result, get_id_from_handler is not used anymore, so remove it.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Pass index of vif instead of hif_drv. wilc_get_vif_idx is used to get correct
index of vif.
In the handler function handle_set_wfi_drv_handler, use vif instead of hif_drv,
and use hif_drv_handler->handler instead of hif_drv when deinitialize wilc
device.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We now have vif index in all functions related with host interface thread.
wilc_get_vif_idx and wilc_get_vif_from_idx are added to get id and vif
respectively.
Relace get_id_from_handler with wilc_get_vif_idx and get_handler_from_id with
wilc_get_vif_from_idx. Remove unused function get_handler_from_id as well.
We get vif where wilc_get_vif_from_idx is called, so pass vif to msg.vif.

There are two get_id_from_handler left. They will be removed in later patch.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Pass struct wilc to the following functions. The functions need wilc to
get proper vif using id from wilc device.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

In the first patch, we sent vif to hostIFthread. we can use vif instead of
drv in the all functions which handle the commands from cfg operations.
Change first argument host_if_drv with wilc_vif and use hif_drv of wilc_vif.
Pass vif to the functions as well.
In case of timer callback functions, set vif to the data and use vif instead
of hif_drv.
Lastly, initialize u32RcvdAssocRespInfoLen since changing hif_drv with vif
causes one uninitialied build warning.
Now we have vif that currently being used so we can use interface index of
wilc_vif to send to wilc device.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

In previous patch we add new argument vif which has hif_drv in it's member.
Therefore, no need to pass hif_drv in those functions. Remove argument
struct host_if_drv and use hif_drv of vif.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

We will pass vif, which is currently being used as net_device, instead of
hif_dev. This is the first step to use index of vif to pass to the driver.
Add new argument vif to all the functions that send message to hostIFthread and
set vif to msg.vif. As a result, hostIfthread will get vif.
In later patch, we will remove drv of host_if_msg and use vif instead of it.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

There are two net_device pointer which is the same because two structures
are merged into wilc_vif in previous patch. Remove wilc_netdev and change
with ndev.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

vif of struct has it's own memory which is not necessary because we have
allocated vif from netdev_priv.
Change vif to pointer type and assign vif which is netdev private data.
Change it's operator on related codes as well.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

perInterface_wlan_t and wilc_vif are all about interface control informations.
We will combine those two structures and maintain as one network interface
control information.
Move all the members of perInterface_wlan_t to wilc_vif and remove the
structure. Rename perInterace_wlan_t to wilc_vif and rename variable name nic
to vif which is proper name for it.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes unnedded extern variable WILC_WFI_devs[] which is not used.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes linux_wlan_spi.[ch] which are not used anymore.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch moves all the codes in linux_wlan_spi.c to wilc_spi.c to make
one spi module. Make wilc_spi_tx, wilc_spi_rx and wilc_spi_tx_rx static
functions. Remove function declaration in linux_wlan_spi.h, which is unnedded
now. No modification has been made inside the codes.
linux_wlan_spi.[ch] will be remove in the next patch.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

wilc_spi_init in linux_wlan_spi.c is unneeded. It just return true. Rename
_wilc_spi_init in wlan_spi.c to wilc_spi_init.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

There are several similar function names, such as wilc_spi_write and
_wilc_spi_write. It is likely to be confused after merging linux_wlan_spi.c and
wilc_spi.c, so rename following functions properly.
Rename wilc_spi_write to wilc_spi_tx, wilc_spi_read to wilc_spi_rx,
wilc_spi_write_read to wilc_spi_tx_rx, _wilc_spi_write to wilc_spi_write,
_wilc_spi_read to wilc_spi_read.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch removes linux_wlan_sdio.[ch] which is not used anymore.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

To Combine linux_wlan_sdio.c and wilc_sdio.c as one file, move all the codes
in linux_wlan_sdio.c to wilc_sdio.c, and make functions static only.
No Modification has not been made except static, just moved them.
Function declaration in linux_wlan_sdio.h is needless, so just remove them.
linux_wlan_sdio.[ch] will be deleted in the next patch.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Return ret from wilc_netdev_init instead of -1 for proper error handling.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

return linux error value instead of 0 or 1 and use -EINVAL. Related codes
also changed together.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch fixes the warning reported by smatch.
 - wilc_deinit() warn: inconsistent returns 'sem:&hif_drv->sem_cfg_values'

This semaphore protect a cfg_values variable but cfg_values variables was not
used here. So, just remove this line.
Signed-off-by: NLeo Kim <leo.kim@atmel.com>
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch fixes the warning reported by smatch.
 - wilc_init() warn: inconsistent returns 'sem:&hif_drv->sem_cfg_values'

No need to up the sema here since down was not called before get here.
Signed-off-by: NLeo Kim <leo.kim@atmel.com>
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch fixes the error reported by smatch.
 - Handle_ListenStateExpired() error: potential null dereference 'wid.val'
If kmalloc failed, referenced to a NULL pointer.
Signed-off-by: NLeo Kim <leo.kim@atmel.com>
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch replace explicit NULL comparison with ! operator to simplify code.
Reported by checkpatch.pl for Comparison to NULL could be written !XXX" or "XXX".
Signed-off-by: NLeo Kim <leo.kim@atmel.com>
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch fixes checkpatch CHECK:comparison to NULL could be written "b".
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch fixes checkpatch warning: missing a blank like after declarations.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patches fixes checkpatch warning: braces {} are not necessary for single
statement blocks. Remove some comments also.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

This patch changes return value with linux error value, not 1 or 0.
Signed-off-by: NGlen Lee <glen.lee@atmel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>