write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/net/ieee802154/cc2520.c
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@@ -1,14 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /* Driver for TI CC2520 802.15.4 Wireless-PAN Networking controller
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  *
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  * Copyright (C) 2014 Varka Bhadram <varkab@cdac.in>
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  *		      Md.Jamal Mohiuddin <mjmohiuddin@cdac.in>
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  *		      P Sowjanya <sowjanyap@cdac.in>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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- *
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  */
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 #include <linux/kernel.h>
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 #include <linux/module.h>
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@@ -223,7 +218,6 @@
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 cc2520_cmd_strobe(struct cc2520_private *priv, u8 cmd)
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 {
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 	int ret;
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-	u8 status = 0xff;
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 	struct spi_message msg;
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 	struct spi_transfer xfer = {
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 		.len = 0,
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@@ -241,8 +235,6 @@
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 		 priv->buf[0]);
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 	ret = spi_sync(priv->spi, &msg);
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-	if (!ret)
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-		status = priv->buf[0];
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 	dev_vdbg(&priv->spi->dev,
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 		 "buf[0] = %02x\n", priv->buf[0]);
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 	mutex_unlock(&priv->buffer_mutex);
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@@ -512,6 +504,7 @@
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 		goto err_tx;
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 	if (status & CC2520_STATUS_TX_UNDERFLOW) {
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+		rc = -EINVAL;
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 		dev_err(&priv->spi->dev, "cc2520 tx underflow exception\n");
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 		goto err_tx;
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 	}
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@@ -977,7 +970,7 @@
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 		if (timeout-- <= 0) {
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 			dev_err(&priv->spi->dev, "oscillator start failed!\n");
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-			return ret;
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+			return -ETIMEDOUT;
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 		}
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 		udelay(1);
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 	} while (!(status & CC2520_STATUS_XOSC32M_STABLE));