qtnfmac: assign each wiphy to its own virtual platform device

Quantenna Pearl device exposes multiple (up to 3) radio interfaces under
single PCIe function. So far all the wiphy devices were attached to the
same pcie device. As a result, all different wireless network devices
were reported under the same sysfs directory for pcie device, e.g.:

$ ls  /sys/class/net/wlan0/device/net/
  wlan0 wlan1

It turns out that such behavior may confuse various users of wireless
subsystem. For instance, it turned out to be the case for:
- Linux init systems, e.g. for renaming based on parent device
- OpenWRT configuration scripts

Suggested solution is to add an intermediate virtual platform device
for each radio interface.

Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
index 722d5caefe3c..018d3ed75fda 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/cfg80211.c
@@ -1061,7 +1061,8 @@ static void qtnf_cfg80211_reg_notifier(struct wiphy *wiphy,
 	}
 }
 
-struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus)
+struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus,
+				  struct platform_device *pdev)
 {
 	struct wiphy *wiphy;
 
@@ -1076,7 +1077,10 @@ struct wiphy *qtnf_wiphy_allocate(struct qtnf_bus *bus)
 	if (!wiphy)
 		return NULL;
 
-	set_wiphy_dev(wiphy, bus->dev);
+	if (pdev)
+		set_wiphy_dev(wiphy, &pdev->dev);
+	else
+		set_wiphy_dev(wiphy, bus->dev);
 
 	return wiphy;
 }