netdev - [PATCH 2/3] ath10k: use devm_reset_control_get() instead of reset_control

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Date:   Tue,  6 Sep 2016 21:39:57 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-wireless@...r.kernel.org
Cc:     Johannes Berg <johannes@...solutions.net>,
        "Luis R. Rodriguez" <mcgrof@...not-panic.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Kalle Valo <kvalo@....qualcomm.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ath10k@...ts.infradead.org
Subject: [PATCH 2/3] ath10k: use devm_reset_control_get() instead of reset_control_get()

Use the managed variant of reset_control_get() to simplify the
failure path and the .remove callback.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 drivers/net/wireless/ath/ath10k/ahb.c | 56 +++++++----------------------------
 1 file changed, 10 insertions(+), 46 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c
index 8a55c0c..6b355ee 100644
--- a/drivers/net/wireless/ath/ath10k/ahb.c
+++ b/drivers/net/wireless/ath/ath10k/ahb.c
@@ -191,92 +191,56 @@ static int ath10k_ahb_rst_ctrl_init(struct ath10k *ar)
 {
 	struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar);
 	struct device *dev;
-	int ret;
 
 	dev = &ar_ahb->pdev->dev;
 
-	ar_ahb->core_cold_rst = reset_control_get(dev, "wifi_core_cold");
+	ar_ahb->core_cold_rst = devm_reset_control_get(dev, "wifi_core_cold");
 	if (IS_ERR_OR_NULL(ar_ahb->core_cold_rst)) {
 		ath10k_err(ar, "failed to get core cold rst ctrl: %ld\n",
 			   PTR_ERR(ar_ahb->core_cold_rst));
-		ret = ar_ahb->core_cold_rst ?
+		return ar_ahb->core_cold_rst ?
 			PTR_ERR(ar_ahb->core_cold_rst) : -ENODEV;
-		goto out;
 	}
 
-	ar_ahb->radio_cold_rst = reset_control_get(dev, "wifi_radio_cold");
+	ar_ahb->radio_cold_rst = devm_reset_control_get(dev, "wifi_radio_cold");
 	if (IS_ERR_OR_NULL(ar_ahb->radio_cold_rst)) {
 		ath10k_err(ar, "failed to get radio cold rst ctrl: %ld\n",
 			   PTR_ERR(ar_ahb->radio_cold_rst));
-		ret = ar_ahb->radio_cold_rst ?
+		return ar_ahb->radio_cold_rst ?
 			PTR_ERR(ar_ahb->radio_cold_rst) : -ENODEV;
-		goto err_core_cold_rst_put;
 	}
 
-	ar_ahb->radio_warm_rst = reset_control_get(dev, "wifi_radio_warm");
+	ar_ahb->radio_warm_rst = devm_reset_control_get(dev, "wifi_radio_warm");
 	if (IS_ERR_OR_NULL(ar_ahb->radio_warm_rst)) {
 		ath10k_err(ar, "failed to get radio warm rst ctrl: %ld\n",
 			   PTR_ERR(ar_ahb->radio_warm_rst));
-		ret = ar_ahb->radio_warm_rst ?
+		return ar_ahb->radio_warm_rst ?
 			PTR_ERR(ar_ahb->radio_warm_rst) : -ENODEV;
-		goto err_radio_cold_rst_put;
 	}
 
-	ar_ahb->radio_srif_rst = reset_control_get(dev, "wifi_radio_srif");
+	ar_ahb->radio_srif_rst = devm_reset_control_get(dev, "wifi_radio_srif");
 	if (IS_ERR_OR_NULL(ar_ahb->radio_srif_rst)) {
 		ath10k_err(ar, "failed to get radio srif rst ctrl: %ld\n",
 			   PTR_ERR(ar_ahb->radio_srif_rst));
-		ret = ar_ahb->radio_srif_rst ?
+		return ar_ahb->radio_srif_rst ?
 			PTR_ERR(ar_ahb->radio_srif_rst) : -ENODEV;
-		goto err_radio_warm_rst_put;
 	}
 
-	ar_ahb->cpu_init_rst = reset_control_get(dev, "wifi_cpu_init");
+	ar_ahb->cpu_init_rst = devm_reset_control_get(dev, "wifi_cpu_init");
 	if (IS_ERR_OR_NULL(ar_ahb->cpu_init_rst)) {
 		ath10k_err(ar, "failed to get cpu init rst ctrl: %ld\n",
 			   PTR_ERR(ar_ahb->cpu_init_rst));
-		ret = ar_ahb->cpu_init_rst ?
+		return ar_ahb->cpu_init_rst ?
 			PTR_ERR(ar_ahb->cpu_init_rst) : -ENODEV;
-		goto err_radio_srif_rst_put;
 	}
 
 	return 0;
-
-err_radio_srif_rst_put:
-	reset_control_put(ar_ahb->radio_srif_rst);
-
-err_radio_warm_rst_put:
-	reset_control_put(ar_ahb->radio_warm_rst);
-
-err_radio_cold_rst_put:
-	reset_control_put(ar_ahb->radio_cold_rst);
-
-err_core_cold_rst_put:
-	reset_control_put(ar_ahb->core_cold_rst);
-
-out:
-	return ret;
 }
 
 static void ath10k_ahb_rst_ctrl_deinit(struct ath10k *ar)
 {
 	struct ath10k_ahb *ar_ahb = ath10k_ahb_priv(ar);
 
-	if (!IS_ERR_OR_NULL(ar_ahb->core_cold_rst))
-		reset_control_put(ar_ahb->core_cold_rst);
-
-	if (!IS_ERR_OR_NULL(ar_ahb->radio_cold_rst))
-		reset_control_put(ar_ahb->radio_cold_rst);
-
-	if (!IS_ERR_OR_NULL(ar_ahb->radio_warm_rst))
-		reset_control_put(ar_ahb->radio_warm_rst);
-
-	if (!IS_ERR_OR_NULL(ar_ahb->radio_srif_rst))
-		reset_control_put(ar_ahb->radio_srif_rst);
-
-	if (!IS_ERR_OR_NULL(ar_ahb->cpu_init_rst))
-		reset_control_put(ar_ahb->cpu_init_rst);
-
 	ar_ahb->core_cold_rst = NULL;
 	ar_ahb->radio_cold_rst = NULL;
 	ar_ahb->radio_warm_rst = NULL;
-- 
1.9.1