[PATCH wireless-next] wifi: rt2x00: allocate anchor with rt2x00dev

[Rosen Penev <rosenp@gmail.com>]

Instead of being creative with devm, allocate with rt2x00dev by using a
flexible array member. Simplifies code slightly.

It's worth noting that in 25369b22223d1c56e42a0cd4ac9137349d5a898e , the
proper device was set to the devm call as it seems there was confusion
there.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/net/wireless/ralink/rt2x00/rt2x00.h    |  3 ++-
 drivers/net/wireless/ralink/rt2x00/rt2x00usb.c | 11 +----------
 2 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00.h b/drivers/net/wireless/ralink/rt2x00/rt2x00.h
index 665887e9b118..7d313e86d3f2 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h
@@ -1009,11 +1009,12 @@ struct rt2x00_dev {
 	/* Extra TX headroom required for alignment purposes. */
 	unsigned int extra_tx_headroom;

-	struct usb_anchor *anchor;
 	unsigned int num_proto_errs;

 	/* Clock for System On Chip devices. */
 	struct clk *clk;
+
+	struct usb_anchor anchor[];
 };

 struct rt2x00_bar_list_entry {
diff --git a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
index 174d89b0b1d7..47e427ea8622 100644
--- a/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/ralink/rt2x00/rt2x00usb.c
@@ -804,7 +804,7 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,

 	usb_reset_device(usb_dev);

-	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
+	hw = ieee80211_alloc_hw(struct_size(rt2x00dev, anchor, 1), ops->hw);
 	if (!hw) {
 		rt2x00_probe_err("Failed to allocate hardware\n");
 		return -ENOMEM;
@@ -826,13 +826,6 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,
 	if (retval)
 		goto exit_free_device;

-	rt2x00dev->anchor = devm_kmalloc(&usb_intf->dev,
-					sizeof(struct usb_anchor),
-					GFP_KERNEL);
-	if (!rt2x00dev->anchor) {
-		retval = -ENOMEM;
-		goto exit_free_reg;
-	}
 	init_usb_anchor(rt2x00dev->anchor);

 	retval = rt2x00lib_probe_dev(rt2x00dev);
@@ -843,8 +836,6 @@ int rt2x00usb_probe(struct usb_interface *usb_intf,

 exit_free_anchor:
 	usb_kill_anchored_urbs(rt2x00dev->anchor);
-
-exit_free_reg:
 	rt2x00usb_free_reg(rt2x00dev);

 exit_free_device:
--
2.54.0