commit 5b2e733746bd8f62423f11f1b1ea91f831d274d7
author Nachiket Kukade <nkukade@codeaurora.org> Fri Apr 06 14:40:22 2018 +0530
committer Gerrit - the friendly Code Review server <code-review@localhost> Mon Apr 09 00:34:35 2018 -0700
tree 63a8eb395bc2dda59eaf21076988f694f3b78b6f
parent ab9d309f7eae559026920ad5a827e3ac480942f6

wlan: Expose wowlan capability to cfg80211

cfg80211 layer (kernel version 3.10 and above) issues disconnect on
connected interfaces during platform suspend if wow is not enabled
via nl80211. After disconnection driver can not put the chip into
wow mode. This results in increased power consumption and frequent
connect/disconnects.

To stop cfg80211 issuing disconnect, expose wow capability to
cfg80211 and let the user to enable wow via nl80211.

Change-Id: I4a2e76ec093e5f0e8fd6b9ba960c09a20c764354
CRs-Fixed: 2219758

CORE/HDD/src/wlan_hdd_cfg80211.c

diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index b1ccb19..e92b5b7 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -459,6 +459,15 @@
 };
 #endif
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)) || defined(WITH_BACKPORTS)
+static const struct wiphy_wowlan_support wowlan_support_cfg80211_init = {
+    .flags = WIPHY_WOWLAN_MAGIC_PKT,
+    .n_patterns = WOWL_MAX_PTRNS_ALLOWED,
+    .pattern_min_len = 1,
+    .pattern_max_len = WOWL_PTRN_MAX_SIZE,
+};
+#endif
+
 static struct cfg80211_ops wlan_hdd_cfg80211_ops;
 
 /* Data rate 100KBPS based on IE Index */
@@ -9019,6 +9028,14 @@
     wiphy->flags |=   WIPHY_FLAG_DISABLE_BEACON_HINTS;
 #endif
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)) || defined(WITH_BACKPORTS)
+    wiphy->wowlan = &wowlan_support_cfg80211_init;
+#else
+    wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT;
+    wiphy->wowlan.n_patterns = WOWL_MAX_PTRNS_ALLOWED;
+    wiphy->wowlan.pattern_min_len = 1;
+    wiphy->wowlan.pattern_max_len = WOWL_PTRN_MAX_SIZE;
+#endif
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0))
     wiphy->flags |= WIPHY_FLAG_HAVE_AP_SME