linux-kernel - [PATCH v2 08/65] staging: wfx: simplify hif_set_arp_ipv4

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Date:   Wed, 15 Jan 2020 13:54:13 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH v2 08/65] staging: wfx: simplify hif_set_arp_ipv4_filter()
 usage

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

The structure hif_mib_arp_ip_addr_table come from hardware API. It is
not intended to be manipulated in upper layers of the driver.

In add, current code for hif_set_arp_ipv4_filter() is too dumb. It
should pack data using the hardware representation instead of leaving
all work to the caller.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/hif_tx_mib.h | 16 +++++++++++++---
 drivers/staging/wfx/sta.c        | 25 +++++++------------------
 2 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/drivers/staging/wfx/hif_tx_mib.h b/drivers/staging/wfx/hif_tx_mib.h
index a8082508fbfd..a325c870b4ea 100644
--- a/drivers/staging/wfx/hif_tx_mib.h
+++ b/drivers/staging/wfx/hif_tx_mib.h
@@ -260,12 +260,22 @@ static inline int hif_keep_alive_period(struct wfx_vif *wvif, int period)
 			     &arg, sizeof(arg));
 };
 
-static inline int hif_set_arp_ipv4_filter(struct wfx_vif *wvif,
-					  struct hif_mib_arp_ip_addr_table *fp)
+static inline int hif_set_arp_ipv4_filter(struct wfx_vif *wvif, int idx,
+					  __be32 *addr)
 {
+	struct hif_mib_arp_ip_addr_table arg = {
+		.condition_idx = idx,
+		.arp_enable = HIF_ARP_NS_FILTERING_DISABLE,
+	};
+
+	if (addr) {
+		// Caution: type of addr is __be32
+		memcpy(arg.ipv4_address, addr, sizeof(arg.ipv4_address));
+		arg.arp_enable = HIF_ARP_NS_FILTERING_ENABLE;
+	}
 	return hif_write_mib(wvif->wdev, wvif->id,
 			     HIF_MIB_ID_ARP_IP_ADDRESSES_TABLE,
-			     fp, sizeof(*fp));
+			     &arg, sizeof(arg));
 }
 
 static inline int hif_use_multi_tx_conf(struct wfx_dev *wdev,
diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index 339acbce96fb..8c55089b1ea4 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -915,30 +915,19 @@ void wfx_bss_info_changed(struct ieee80211_hw *hw,
 	struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
 	bool do_join = false;
 	int i;
-	int nb_arp_addr;
 
 	mutex_lock(&wdev->conf_mutex);
 
 	/* TODO: BSS_CHANGED_QOS */
 	if (changed & BSS_CHANGED_ARP_FILTER) {
-		struct hif_mib_arp_ip_addr_table filter = { };
-
-		nb_arp_addr = info->arp_addr_cnt;
-		if (nb_arp_addr <= 0 || nb_arp_addr > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES)
-			nb_arp_addr = 0;
-
 		for (i = 0; i < HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES; i++) {
-			filter.condition_idx = i;
-			if (i < nb_arp_addr) {
-				// Caution: type of arp_addr_list[i] is __be32
-				memcpy(filter.ipv4_address,
-				       &info->arp_addr_list[i],
-				       sizeof(filter.ipv4_address));
-				filter.arp_enable = HIF_ARP_NS_FILTERING_ENABLE;
-			} else {
-				filter.arp_enable = HIF_ARP_NS_FILTERING_DISABLE;
-			}
-			hif_set_arp_ipv4_filter(wvif, &filter);
+			__be32 *arp_addr = &info->arp_addr_list[i];
+
+			if (info->arp_addr_cnt > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES)
+				arp_addr = NULL;
+			if (i >= info->arp_addr_cnt)
+				arp_addr = NULL;
+			hif_set_arp_ipv4_filter(wvif, i, arp_addr);
 		}
 	}
 
-- 
2.25.0