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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Ilan Peer <ilan.peer@intel.com>,
        Luca Coelho <luciano.coelho@intel.com>
Subject: [PATCH 4.19 199/239] iwlwifi: mvm: Increase the scan timeout guard to 30 seconds
Date:   Mon, 24 Jan 2022 19:43:57 +0100
Message-Id: <20220124183949.441382787@linuxfoundation.org>
In-Reply-To: <20220124183943.102762895@linuxfoundation.org>
References: <20220124183943.102762895@linuxfoundation.org>
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From: Ilan Peer <ilan.peer@intel.com>

commit ced50f1133af12f7521bb777fcf4046ca908fb77 upstream.

With the introduction of 6GHz channels the scan guard timeout should
be adjusted to account for the following extreme case:

- All 6GHz channels are scanned passively: 58 channels.
- The scan is fragmented with the following parameters: 3 fragments,
  95 TUs suspend time, 44 TUs maximal out of channel time.

The above would result with scan time of more than 24 seconds. Thus,
set the timeout to 30 seconds.

Cc: stable@vger.kernel.org
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211210090244.3c851b93aef5.I346fa2e1d79220a6770496e773c6f87a2ad9e6c4@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wireless/intel/iwlwifi/mvm/scan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -1555,7 +1555,7 @@ static int iwl_mvm_check_running_scans(s
 	return -EIO;
 }
 
-#define SCAN_TIMEOUT 20000
+#define SCAN_TIMEOUT 30000
 
 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
 {