linux-kernel - [PATCH] rt2x00: BUG: remove double loop on REGISTER_BUSY

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Date:	Thu,  3 Apr 2014 16:12:07 +0200
From:	Richard Genoud <richard.genoud@...il.com>
To:	Ivo van Doorn <IvDoorn@...il.com>
Cc:	Gertjan van Wingerde <gwingerde@...il.com>,
	Helmut Schaa <helmut.schaa@...glemail.com>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	Richard Genoud <richard.genoud@...il.com>
Subject: [PATCH] rt2x00: BUG: remove double loop on REGISTER_BUSY_COUNT

rt2x00usb_register_read_lock() calls rt2x00usb_vendor_req_buff_lock()
that calls rt2x00usb_vendor_request() which is already looping up to
REGISTER_BUSY_COUNT times.

So this loop is not needed.

Signed-off-by: Richard Genoud <richard.genoud@...il.com>
---
 drivers/net/wireless/rt2x00/rt2x00usb.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.c b/drivers/net/wireless/rt2x00/rt2x00usb.c
index 10572452cc21..14142b099019 100644
--- a/drivers/net/wireless/rt2x00/rt2x00usb.c
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.c
@@ -148,12 +148,9 @@ int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
 	if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
 		return -ENODEV;
 
-	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
-		rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
-		if (!rt2x00_get_field32(*reg, field))
-			return 1;
-		udelay(REGISTER_BUSY_DELAY);
-	}
+	rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
+	if (!rt2x00_get_field32(*reg, field))
+		return 1;
 
 	rt2x00_err(rt2x00dev, "Indirect register access failed: offset=0x%.08x, value=0x%.08x\n",
 		   offset, *reg);
-- 
1.8.5.5

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