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From: Emmanuel Grumbach <egrumbach@gmail.com>
To: linux-wireless@vger.kernel.org
Cc: Eyal Shapira <eyal@wizery.com>,
	Eyal Shapira <eyalx.shapira@intel.com>,
	Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Subject: [PATCH 12/12] iwlwifi: mvm: fix an overflow in iwl_mvm_get_signal_strength
Date: Mon,  8 Sep 2014 19:56:17 +0300	[thread overview]
Message-ID: <1410195377-10075-12-git-send-email-egrumbach@gmail.com> (raw)
In-Reply-To: <540DDF37.5030801@gmail.com>

From: Eyal Shapira <eyal@wizery.com>

The idea here is to translate a value of 0 received from
the firmware to the lowest rssi figure. As rx_status->chain_signal
is a signed byte the lowest possible value is -128 and not -256.
-256 was causing 0 to get stored in the signed byte.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
---
 drivers/net/wireless/iwlwifi/mvm/rx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c
index 4b98987..bf5cd8c 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rx.c
@@ -149,13 +149,13 @@ static void iwl_mvm_get_signal_strength(struct iwl_mvm *mvm,
 	    le32_to_cpu(phy_info->non_cfg_phy[IWL_RX_INFO_ENERGY_ANT_ABC_IDX]);
 	energy_a = (val & IWL_RX_INFO_ENERGY_ANT_A_MSK) >>
 						IWL_RX_INFO_ENERGY_ANT_A_POS;
-	energy_a = energy_a ? -energy_a : -256;
+	energy_a = energy_a ? -energy_a : S8_MIN;
 	energy_b = (val & IWL_RX_INFO_ENERGY_ANT_B_MSK) >>
 						IWL_RX_INFO_ENERGY_ANT_B_POS;
-	energy_b = energy_b ? -energy_b : -256;
+	energy_b = energy_b ? -energy_b : S8_MIN;
 	energy_c = (val & IWL_RX_INFO_ENERGY_ANT_C_MSK) >>
 						IWL_RX_INFO_ENERGY_ANT_C_POS;
-	energy_c = energy_c ? -energy_c : -256;
+	energy_c = energy_c ? -energy_c : S8_MIN;
 	max_energy = max(energy_a, energy_b);
 	max_energy = max(max_energy, energy_c);
 
-- 
1.9.1


  parent reply	other threads:[~2014-09-08 16:56 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-08 16:54 pull request: iwlwifi 2014-09-08 Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 01/12] iwlwifi: mvm: enable scheduled scan on newest firmware Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 02/12] iwlwifi: mvm: BT Coex - remove shadowing variable Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 03/12] iwlwifi: mvm: set MAC_FILTER_IN_BEACON correctly for STA/P2P client Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 04/12] iwlwifi: mvm: fix endianity issues with Smart Fifo commands Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 05/12] iwlwifi: increase DEFAULT_MAX_TX_POWER Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 06/12] iwlwifi: mvm: correctly handle PM/QoS changes from mac80211 Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 07/12] iwlwifi: mvm: treat EAPOLs like mgmt frames wrt rate Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 08/12] iwlwiwi: mvm: use bss_conf->dtim_period instead of conf.ps_dtim_period Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 09/12] iwlwifi: mvm: BT Coex - always initialize smps_mode Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 10/12] iwlwifi: dvm: disable power save by default Emmanuel Grumbach
2014-09-08 16:56 ` [PATCH 11/12] iwlwifi: add PCI IDs and add then new 3165 series Emmanuel Grumbach
2014-09-08 16:56 ` Emmanuel Grumbach [this message]
2014-09-09 19:01 ` pull request: iwlwifi 2014-09-08 John W. Linville
2014-09-15  5:07 pull request: iwlwifi-next 2014-09-15 Emmanuel Grumbach
2014-09-15  5:10 ` [PATCH 12/12] iwlwifi: mvm: fix an overflow in iwl_mvm_get_signal_strength Emmanuel Grumbach

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