[linux-yocto] FW: [PATCH] iwlwifi: mvm: don't allow sched scans without matches to be started

[Bruce Ashfield]

On 2016-03-07 2:05 AM, Zheng, Wu wrote:
> Hi Bruce Ashfield,
>
> Our system platform will use linux-yocto-4.4.
>
> Therefore, Sending the patch again, It is for linux-yocto-4.4.
> Thanks.

I've merged the change to the 4.4 tree. SRCREV updates will follow
in a few days, but if you adjust SRCREVs yourself, you can use it
now.

Bruce

>
> Best Regards
> Zheng Wu
>
>> -----Original Message-----
>> From: Zheng, Wu
>> Sent: Monday, March 7, 2016 3:09 PM
>> To: linux-yocto at yoctoproject.org
>> Cc: Ashfield, Bruce (Wind River) <bruce.ashfield at windriver.com>; Zheng, Wu
>> <wu.zheng at intel.com>; Coelho, Luciano <luciano.coelho at intel.com>;
>> Grumbach, Emmanuel <emmanuel.grumbach at intel.com>
>> Subject: [PATCH] iwlwifi: mvm: don't allow sched scans without matches to be
>> started
>>
>> commit 5e56276e7555b34550d51459a801ff75eca8b907 upstream.
>>
>> The firmware can perform a scheduled scan with not matchsets passed, but it
>> can't send notification that results were found.  Since the userspace then
>> cannot know when we got new results and the firmware wouldn't trigger a wake
>> in case we are sleeping, it's better not to allow scans without matchsets.
>>
>> This fixes https://bugzilla.kernel.org/show_bug.cgi?id=110831
>>
>> Signed-off-by: Luca Coelho <luciano.coelho at intel.com>
>> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach at intel.com>
>> Signed-off-by: Wu Zheng <wu.zheng at intel.com>
>> ---
>> drivers/net/wireless/iwlwifi/mvm/scan.c | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/drivers/net/wireless/iwlwifi/mvm/scan.c
>> b/drivers/net/wireless/iwlwifi/mvm/scan.c
>> index d6e0c1b..8215d74 100644
>> --- a/drivers/net/wireless/iwlwifi/mvm/scan.c
>> +++ b/drivers/net/wireless/iwlwifi/mvm/scan.c
>> @@ -1267,6 +1267,10 @@ int iwl_mvm_sched_scan_start(struct iwl_mvm
>> *mvm,
>>                return -EBUSY;
>>        }
>>
>> +      /* we don't support "match all" in the firmware */
>> +      if (!req->n_match_sets)
>> +              return -EOPNOTSUPP;
>> +
>>        ret = iwl_mvm_check_running_scans(mvm, type);
>>        if (ret)
>>                return ret;
>> --
>> 2.1.4
>