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2009-10-27wl1271: Update TX path block calucation algoJuuso Oikarinen
Update the TX path block calculation algorithm based on TI reference. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Enable smart reflexJuuso Oikarinen
Enable and configure smart reflex. This should have a reducing impact on power consumption. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Enable ELPJuuso Oikarinen
The new firmware has fixed a firmware crash problem related to ELP entry. Enable ELP to conserve power. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Update interrupt handling by removing an extra SPI readJuuso Oikarinen
Remove separate interrupt register reading from the interrupt handling routine. This will slightly improve interrupt performance. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: RefClk configurationJuuso Oikarinen
Updated RefClk configuration based on reference sources. Apparently this change will improve RF performance. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Add top-register access functionsJuuso Oikarinen
Add top register access function. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Remove RX workaroundJuuso Oikarinen
Remove RX workaround which is not needed with newer firmware revisions. This will reduce one SPI register transaction per RX packet. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Update memory mapping for firmware revision 6.1.0.0.241Juuso Oikarinen
Update the memory regions and memory mapping to support firmware revision 6.1.0.0.241. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: enable HW_AVAILABLE interrupt to fix ELPLuciano Coelho
We need to listen to HW_AVAILABLE interrupts when using ELP with firmware revision 6.1.0.0.241. Add WL1271_ACX_INTR_HW_AVAILABLE to the interrupts that are enabled by default. Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: add workaround to avoid distortion due to excessive tx powerLuciano Coelho
We still don't have proper calibration for our devices, so we are using way too much power for TX, which causes a lot of distortion. This hack hardcodes the txpower to 7dBm. Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: workaround to send a disconnect before rejoiningLuciano Coelho
We don't get any indication from the stack when we have disassociated. In wl1271, it is important to send a CMD_DISCONNECT before joining again, because the firmware cleans some things up. So we check if we're already joined and disconnect if that's the case. Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: implement cmd_disconnectLuciano Coelho
This patch implements the CMD_DISCONNECT command, which should be sent to the firmware when we are disassociated. Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: update channel switch command APIWey-Yi Guy
Channel switch host command has different data structure for different devices. Adding additional structures to support 5000 and 6000 NICs. unlike 4965, starting with 5000 series, the tx power is managed by uCode, there is no tx power db information need to be passing from driver to uCode; but the space needs to be reserved to match uCode expection. 1000 NIC do not support channel switch operation since it is 'bgn' device, there is no need to have data structure defined for it. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwl3945: rearrange the code.Abhijeet Kolekar
Rearrange the code and groups setting of retry_limit and data_retry_limits code together. Make 'data_retry_limit' setting similar to iwlwifi for better readability. Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi/iwl3945: remove data_retry_limitAbhijeet Kolekar
Remove the ununsed variable data_retry_limit from priv. Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwl3945: rename tx to tx_cmdAbhijeet Kolekar
Rename iwl3945_tx_cmd variable tx to tx_cmd for better readability. Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi/iwl3945: unify rts_tx_cmd_flagAbhijeet Kolekar
3945 and 4965 share the functionality for setting RTS and CTS to the tx_cmd. Unify these functions and move the common functionality to core. Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: showing accumulative ucode statistics countersWey-Yi Guy
Adding accumulative statistics counters in iwlwifi driver. Statistics counters are reported by uCode every beacon interval; but can be reset by uCode when needed. The accumulative statistics counters is maintained by driver to keep track of the history of all the counters. Update the ucode stats files in debugfs to display both latest and accumulative counters. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: dynamic allocate tx queue structureWey-Yi Guy
Instead of always allocate the max number of tx queue structure, use dynamic allocation based on the number of queues in device configuration. With these changes, device does not have to allocate more memory than the h/w can support. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwl3945: move iwl_power_initialize()Ben Cahill
iwl_power_initialize() initializes driver data (not device hardware), and does not need to execute more than once (when the driver initializes). Therefore, it does not belong in iwl3945_apm_init(), which initializes hardware, and may run more than once. Move it to iwl3945_pci_probe(), where it will run only once. This agrees with similar placement in iwl-agn.c's iwl_pci_probe(), although placement under "services" seemed more appropriate than under "mac80211". Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwl3945: streamline iwl3945_rfkill_poll()Ben Cahill
iwl3945_rfkill_poll() has been silently calling wiphy_rfkill_set_hw_state() every 2 seconds, regardless of whether hardware RF KILL switch changed state. Call wiphy_rfkill_set_hw_state() only when RFKILL switch changes. Add IWL_DEBUG_RF_KILL log message and documentation. Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: fix userspace setting of sleep_level_overrideReinette Chatre
The sleep_level_override debugfs file is used by the user to request a static power index instead of the dynamic sleep values. Users are expected to provide value from 1 to 5 as an index or -1 to disable it. The problem at the moment is that users can also provide 0 to this file which, together with the value 1, is translated to index 1. This is confusing and even more so when users write 0 to sleep_level_override and then read 1 from it afterwards. Modify checking to treat 0 as invalid. Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: additional items in sensitivity range tableWey-Yi Guy
Add more items to sensitivity range table to avoid using hardcoded values. Initialize the table per device since unique per device information is required to perform sensitivity calibration. additional items in sensitivity range table: .barker_corr_th_min: Barker correlation threshold minimum .barker_corr_th_min_mrc: Barker correlation threshold minimum for MRC .nrg_th_cca: Energy threshold for Clear Channel Assessment Barker codes are a technique used in WLAN encoding for transmission. MRC is "Maximal Ratio Combining", a technique for optimally combining the signals from 2 or more receivers to achieve a better signal. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: remove duplicated/unused definitionWey-Yi Guy
"IWL_CMD_QUEUE_NUM" is being defined in multiple places and used by all the devices. move it to iwl-dev.h file and shared by all the devices. Remove "IWL_CMD_FIFO_NUM", replaced by "IWL49_CMD_FIFO_NUM" and IWL50_CMD_FIFO_NUM" Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlagn, iwl3945: remove apm_reset() functionsBen Cahill
Clean up device-specific apm_reset() functions and library infrastructure, now that these reset() functions are no longer being used. Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwl3945: remove unnecessary call to apm_ops.reset()Ben Cahill
Now that we're unconditionally using apm_ops.stop() to reset and power-down the device in __iwl3945_down(), the apm_ops.reset() is redundant. Removing this call will also allow us to remove iwl3945_apm_reset(). Remove unneeded iwl_clear_bit(CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ) because this bit will be set again very soon in iwl3945_hw_txq_ctx_stop() and other following calls. Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwlwifi: turn off device when not used.Ben Cahill
In some cases (e.g. when mac80211 calls iwl_mac_stop() for suspend or user no longer wants device active), device has not been going into low power state via __iwl_down(). apm_ops.reset() does not put device into low power state; instead it resets the device, then puts it into a powered-up state ready to be re-loaded with uCode and re-started. This has needlessly warmed up user's laptops and drained batteries. With current architecture in which mac80211 controls device up/down (including resetting device after firmware errors), there is no need for apm_ops.reset() any more; apm_ops.reset() is basically a combination of apm_ops.stop() and apm_ops.init(). Instead, __iwl_down() now unconditionally places the device into a low-power state via apm_ops.stop(). Device may be re-started via __iwl_up() calling apm_ops.init() as soon as it may be needed (e.g. quickly for firmware errors), but in the meantime, device will stop wasting energy. Note that, even in this low power state, if driver re-enables interrupts, the device retains the ability to sense the hardware RF-KILL switch, and (except for 3945) interrupt the host when it changes. Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27iwl3945: update iwl3945_apm_init()Ben Cahill
Update iwl3945_apm_init() to set up device registers in sequence most recently recommended by factory. Add resets for APMG interrupts and radio chip, formerly done only in iwl3945_apm_reset(); moving them here assures that apm_init() will do a complete job of preparing hardware not only after platform boot, but also after apm_stop() has executed (due to rfkill, ifconfig down, driver unload, etc.). This is in preparation to completely remove apm_reset(). Add some comments. Signed-off-by: Ben Cahill <ben.m.cahill@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27airo : allow supend with card without power managementmatthieu castet
Some airo card don't support power Management [1]. Don't abort suspend with those cards. 00:06.0 Network controller: AIRONET Wireless Communications PC4800 (rev 01) Flags: medium devsel, IRQ 17 Memory at dffffe00 (32-bit, non-prefetchable) [size=128] I/O ports at d000 [size=128] I/O ports at cc00 [size=64] Kernel driver in use: airo Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27b43: Remove me as maintainerMichael Buesch
Remove me Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27ssb: Put host pointers into a unionMichael Buesch
This slightly shrinks the structure. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27b43/legacy: Fix usage of host_pci pointerMichael Buesch
We must check the bustype before using the host_pci pointer. Signed-off-by: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27ath9k: Fix TX hang poll routineSujith
When TX is hung, the chip is reset. Ensure that the chip is awake by using the PS wrappers. Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27libertas: Check return status of command functionsAmitkumar Karwar
Return status of lbs_prepare_and_send_command and lbs_cmd_with_response functions is not checked at some places. Those checks are added. Signed-off-by: Amitkumar Karwar <akarwar@marvell.com> Signed-off-by: Bing Zhao <bzhao@marvell.com> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Mask unneeded events from firmware to conserve powerJuuso Oikarinen
Currently several events are enabled from the firmware for which there is no handling. This wakes up the host unnecessarily. Mask those unneeded events. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Configure beacon filtering on if PSM usedJuuso Oikarinen
Enable beacon filtering when PSM is enabled Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Enable beacon filtering with the stackJuuso Oikarinen
Enable beacon filtering with the mac80211 stack. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Add connection monitoring configurationJuuso Oikarinen
Add configuration for connection monitor (number of allowed beacons, and timeout after last received beacon.) Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Use vmalloc to allocate memory for firmwareJuuso Oikarinen
Use vmalloc to allocate memory for the firmware image, and use a smaller linear buffer for the actual transfer of the firmware to the chipset. This patch is an adaptation of a similar patch for wl1251 by Kalle Valo. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Multicast filtering configurationJuuso Oikarinen
Enable multicast filtering. This way by default no multicast frames will reach the host, and when needed, only required multicast frames can be passed from the WLAN chipset to the host. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Clear probe-request template after scanJuuso Oikarinen
Clear the probe-request template on the firmware after scan. Unless cleared, the firmware can independently send probe requests to the AP and interfere with the mac80211 logic. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: use workqueue provided by mac80211 instead of the defaultJuuso Oikarinen
Use the workqueue provided by the mac80211 stack instead of the system default queue. Modified to use new ieee_queue_work() as required by changes in the stack. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: hack to disable filtersLuciano Coelho
This is a hack to disable all filters in the join command. This is based on Kalle Valo's patch for wl1251. Cc: Kalle Valo <kalle.valo@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: added Juuso Oikarinen as module authorLuciano Coelho
Add Juuso as one of the module authors, since he's working heavily on this module as well. Cc: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Corrections to TX pathJuuso Oikarinen
Corrections to the TX path - use correct number of maximum descriptors (32 instead of 16) and correct checking and setting of excessive retries on completion. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Update join usageJuuso Oikarinen
Update the usage of join's, including using actual beacon interval and dtim from AP, and configuring a basic rate set from AP. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Configure rate policies based on AP ratesJuuso Oikarinen
Configure the rate policies to the firmware based on the rates given by the AP. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Implementation for SPI busy word checkingJuuso Oikarinen
This patch adds implementation for checking for SPI busy words - i.e. honoring a delay request from the WLAN chipset upon reading registers/memory. To optimized the average SPI ready by 32 bits, also configure the number of busywords to one to disable the "fixed-busy-word" functionality. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: mask aid bits 14 and 15 in ps-poll templateJuuso Oikarinen
In ps-poll template aid bits 14 and 15 were not masked as required by the standard. Mask them so that aid is sent in correct format. This patch is a direct port of the respective patch for the wl1251 driver by Kalle Valo. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-10-27wl1271: Implement delayed entry into ELPJuuso Oikarinen
Implement delayed entry into ELP. This will promote the following: - Less redundant sleep/wake cycles (better perf) - Avoids known firmware issues with going to ELP too fast after an operation Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>