Message-Id: <20161216114632.22559-5-mcgrof@kernel.org>
Date:   Fri, 16 Dec 2016 03:46:32 -0800
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     gregkh@...uxfoundation.org, ming.lei@...onical.com
Cc:     wagi@...om.org, teg@...m.no, mchehab@....samsung.com,
        zajec5@...il.com, linux-kernel@...r.kernel.org,
        markivx@...eaurora.org, stephen.boyd@...aro.org,
        broonie@...nel.org, zohar@...ux.vnet.ibm.com, tiwai@...e.de,
        johannes@...solutions.net, chunkeey@...glemail.com,
        hauke@...ke-m.de, jwboyer@...oraproject.org,
        dmitry.torokhov@...il.com, dwmw2@...radead.org, jslaby@...e.com,
        torvalds@...ux-foundation.org, luto@...capital.net,
        fengguang.wu@...el.com, rpurdie@...ys.net,
        j.anaszewski@...sung.com, Abhay_Salunke@...l.com,
        Julia.Lawall@...6.fr, Gilles.Muller@...6.fr, nicolas.palix@...g.fr,
        dhowells@...hat.com, bjorn.andersson@...aro.org,
        arend.vanspriel@...adcom.com, kvalo@...eaurora.org,
        "Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH v3 4/4] p54: convert to sysdata API

The Coccinelle sysdata patches were used to help with
this transition. The changes have been carefully manually
vetted for. With the conversion we modify the cases that do
not need the firmware to be kept so that the sysdata API
can release it for us. Using the new sysdata API also means
we can get rid of our own completions.

v2: was not present
v3: initial release
v4: small cosmetic fixes
v5: bike shed changes

Generated-by: Coccinelle SmPL
Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 drivers/net/wireless/intersil/p54/eeprom.c |  2 +-
 drivers/net/wireless/intersil/p54/fwio.c   |  5 +-
 drivers/net/wireless/intersil/p54/led.c    |  2 +-
 drivers/net/wireless/intersil/p54/main.c   |  2 +-
 drivers/net/wireless/intersil/p54/p54.h    |  3 +-
 drivers/net/wireless/intersil/p54/p54pci.c | 26 ++++++----
 drivers/net/wireless/intersil/p54/p54pci.h |  4 +-
 drivers/net/wireless/intersil/p54/p54spi.c | 80 +++++++++++++++++++-----------
 drivers/net/wireless/intersil/p54/p54spi.h |  2 +-
 drivers/net/wireless/intersil/p54/p54usb.c | 18 +++----
 drivers/net/wireless/intersil/p54/p54usb.h |  4 +-
 drivers/net/wireless/intersil/p54/txrx.c   |  2 +-
 12 files changed, 89 insertions(+), 61 deletions(-)

diff --git a/drivers/net/wireless/intersil/p54/eeprom.c b/drivers/net/wireless/intersil/p54/eeprom.c
index d4c73d39336f..b8184cbc6770 100644
--- a/drivers/net/wireless/intersil/p54/eeprom.c
+++ b/drivers/net/wireless/intersil/p54/eeprom.c
@@ -16,7 +16,7 @@
  * published by the Free Software Foundation.
  */
 
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 #include <linux/sort.h>
 #include <linux/slab.h>
diff --git a/drivers/net/wireless/intersil/p54/fwio.c b/drivers/net/wireless/intersil/p54/fwio.c
index 4ac6764f4897..dc27049e4533 100644
--- a/drivers/net/wireless/intersil/p54/fwio.c
+++ b/drivers/net/wireless/intersil/p54/fwio.c
@@ -17,7 +17,7 @@
  */
 
 #include <linux/slab.h>
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 #include <linux/export.h>
 
@@ -27,7 +27,8 @@
 #include "eeprom.h"
 #include "lmac.h"
 
-int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw)
+int p54_parse_firmware(struct ieee80211_hw *dev,
+		       const struct drvdata *fw)
 {
 	struct p54_common *priv = dev->priv;
 	struct exp_if *exp_if;
diff --git a/drivers/net/wireless/intersil/p54/led.c b/drivers/net/wireless/intersil/p54/led.c
index 9a8fedd3c0f5..4d13598d3968 100644
--- a/drivers/net/wireless/intersil/p54/led.c
+++ b/drivers/net/wireless/intersil/p54/led.c
@@ -16,7 +16,7 @@
  * published by the Free Software Foundation.
  */
 
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 
 #include <net/mac80211.h>
diff --git a/drivers/net/wireless/intersil/p54/main.c b/drivers/net/wireless/intersil/p54/main.c
index d5a3bf91a03e..a1c546cd232c 100644
--- a/drivers/net/wireless/intersil/p54/main.c
+++ b/drivers/net/wireless/intersil/p54/main.c
@@ -17,7 +17,7 @@
  */
 
 #include <linux/slab.h>
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 #include <linux/module.h>
 
diff --git a/drivers/net/wireless/intersil/p54/p54.h b/drivers/net/wireless/intersil/p54/p54.h
index 529939e611cd..5bbe9d77e5fc 100644
--- a/drivers/net/wireless/intersil/p54/p54.h
+++ b/drivers/net/wireless/intersil/p54/p54.h
@@ -268,7 +268,8 @@ struct p54_common {
 /* interfaces for the drivers */
 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb);
 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb);
-int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw);
+int p54_parse_firmware(struct ieee80211_hw *dev,
+		       const struct drvdata *fw);
 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len);
 int p54_read_eeprom(struct ieee80211_hw *dev);
 
diff --git a/drivers/net/wireless/intersil/p54/p54pci.c b/drivers/net/wireless/intersil/p54/p54pci.c
index 27a49068d32d..0e7fd9ba7186 100644
--- a/drivers/net/wireless/intersil/p54/p54pci.c
+++ b/drivers/net/wireless/intersil/p54/p54pci.c
@@ -15,7 +15,7 @@
 
 #include <linux/pci.h>
 #include <linux/slab.h>
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 #include <linux/delay.h>
 #include <linux/completion.h>
@@ -490,7 +490,7 @@ static int p54p_open(struct ieee80211_hw *dev)
 	return 0;
 }
 
-static void p54p_firmware_step2(const struct firmware *fw,
+static void p54p_firmware_step2(const struct drvdata *fw,
 				void *context)
 {
 	struct p54p_priv *priv = context;
@@ -520,8 +520,6 @@ static void p54p_firmware_step2(const struct firmware *fw,
 
 out:
 
-	complete(&priv->fw_loaded);
-
 	if (err) {
 		struct device *parent = pdev->dev.parent;
 
@@ -542,6 +540,17 @@ static void p54p_firmware_step2(const struct firmware *fw,
 	pci_dev_put(pdev);
 }
 
+static int p54p_load_firmware(struct p54p_priv *priv)
+{
+	const struct drvdata_req_params req_params = {
+		DRVDATA_KEEP_ASYNC(p54p_firmware_step2, priv),
+	};
+
+	return drvdata_request_async("isl3886pci", &req_params,
+				     &priv->pdev->dev,
+				     &priv->fw_async_cookie);
+}
+
 static int p54p_probe(struct pci_dev *pdev,
 				const struct pci_device_id *id)
 {
@@ -595,7 +604,6 @@ static int p54p_probe(struct pci_dev *pdev,
 	priv = dev->priv;
 	priv->pdev = pdev;
 
-	init_completion(&priv->fw_loaded);
 	SET_IEEE80211_DEV(dev, &pdev->dev);
 	pci_set_drvdata(pdev, dev);
 
@@ -620,9 +628,7 @@ static int p54p_probe(struct pci_dev *pdev,
 	spin_lock_init(&priv->lock);
 	tasklet_init(&priv->tasklet, p54p_tasklet, (unsigned long)dev);
 
-	err = request_firmware_nowait(THIS_MODULE, 1, "isl3886pci",
-				      &priv->pdev->dev, GFP_KERNEL,
-				      priv, p54p_firmware_step2);
+	err = p54p_load_firmware(priv);
 	if (!err)
 		return 0;
 
@@ -652,9 +658,9 @@ static void p54p_remove(struct pci_dev *pdev)
 		return;
 
 	priv = dev->priv;
-	wait_for_completion(&priv->fw_loaded);
+	drvdata_synchronize_request(priv->fw_async_cookie);
 	p54_unregister_common(dev);
-	release_firmware(priv->firmware);
+	release_drvdata(priv->firmware);
 	pci_free_consistent(pdev, sizeof(*priv->ring_control),
 			    priv->ring_control, priv->ring_control_dma);
 	iounmap(priv->map);
diff --git a/drivers/net/wireless/intersil/p54/p54pci.h b/drivers/net/wireless/intersil/p54/p54pci.h
index 68405c142f97..00c30e1fc60b 100644
--- a/drivers/net/wireless/intersil/p54/p54pci.h
+++ b/drivers/net/wireless/intersil/p54/p54pci.h
@@ -94,7 +94,7 @@ struct p54p_priv {
 	struct pci_dev *pdev;
 	struct p54p_csr __iomem *map;
 	struct tasklet_struct tasklet;
-	const struct firmware *firmware;
+	const struct drvdata *firmware;
 	spinlock_t lock;
 	struct p54p_ring_control *ring_control;
 	dma_addr_t ring_control_dma;
@@ -105,7 +105,7 @@ struct p54p_priv {
 	struct sk_buff *tx_buf_data[32];
 	struct sk_buff *tx_buf_mgmt[4];
 	struct completion boot_comp;
-	struct completion fw_loaded;
+	async_cookie_t fw_async_cookie;
 };
 
 #endif /* P54USB_H */
diff --git a/drivers/net/wireless/intersil/p54/p54spi.c b/drivers/net/wireless/intersil/p54/p54spi.c
index 7ab2f43ab425..c0118048c01f 100644
--- a/drivers/net/wireless/intersil/p54/p54spi.c
+++ b/drivers/net/wireless/intersil/p54/p54spi.c
@@ -23,7 +23,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/spi/spi.h>
@@ -162,53 +162,73 @@ static int p54spi_spi_write_dma(struct p54s_priv *priv, __le32 base,
 	return 0;
 }
 
+static int p54spi_request_firmware_found_cb(void *context,
+					    const struct drvdata *drvdata)
+{
+	int ret;
+	struct p54s_priv *priv = context;
+
+	priv->firmware = drvdata;
+	ret = p54_parse_firmware(priv->hw, priv->firmware);
+	if (ret)
+		release_drvdata(priv->firmware);
+
+	return ret;
+}
+
 static int p54spi_request_firmware(struct ieee80211_hw *dev)
 {
 	struct p54s_priv *priv = dev->priv;
+	const struct drvdata_req_params req_params = {
+		DRVDATA_KEEP_SYNC(p54spi_request_firmware_found_cb, priv),
+	};
 	int ret;
 
 	/* FIXME: should driver use it's own struct device? */
-	ret = request_firmware(&priv->firmware, "3826.arm", &priv->spi->dev);
-
+	ret = drvdata_request("3826.arm", &req_params, &priv->spi->dev);
 	if (ret < 0) {
-		dev_err(&priv->spi->dev, "request_firmware() failed: %d", ret);
-		return ret;
+		dev_err(&priv->spi->dev,
+			"firmware request failed: %d", ret);
 	}
+	return ret;
+}
 
-	ret = p54_parse_firmware(dev, priv->firmware);
-	if (ret) {
-		release_firmware(priv->firmware);
-		return ret;
-	}
+#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
+static int p54spi_load_eeprom_default(void *context)
+{
+	struct p54s_priv *priv = context;
+	struct ieee80211_hw *dev = priv->hw;
 
-	return 0;
+	dev_info(&priv->spi->dev, "loading default eeprom...\n");
+	return p54_parse_eeprom(dev, (void *) p54spi_eeprom,
+				sizeof(p54spi_eeprom));
 }
+#endif
+
+static int p54spi_load_eeprom_cb(void *context,
+				 const struct drvdata *drvdata)
+{
+	struct p54s_priv *priv = context;
+	struct ieee80211_hw *dev = priv->hw;
 
+	dev_info(&priv->spi->dev, "loading user eeprom...\n");
+	return p54_parse_eeprom(dev, (void *) drvdata->data,
+				(int)drvdata->size);
+}
 static int p54spi_request_eeprom(struct ieee80211_hw *dev)
 {
 	struct p54s_priv *priv = dev->priv;
-	const struct firmware *eeprom;
-	int ret;
+	const struct drvdata_req_params req_params = {
+		DRVDATA_DEFAULT_SYNC(p54spi_load_eeprom_cb, priv),
+#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
+		DRVDATA_SYNC_OPT_CB(p54spi_load_eeprom_default, priv),
+#endif
+	};
 
 	/* allow users to customize their eeprom.
 	 */
 
-	ret = request_firmware_direct(&eeprom, "3826.eeprom", &priv->spi->dev);
-	if (ret < 0) {
-#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
-		dev_info(&priv->spi->dev, "loading default eeprom...\n");
-		ret = p54_parse_eeprom(dev, (void *) p54spi_eeprom,
-				       sizeof(p54spi_eeprom));
-#else
-		dev_err(&priv->spi->dev, "Failed to request user eeprom\n");
-#endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
-	} else {
-		dev_info(&priv->spi->dev, "loading user eeprom...\n");
-		ret = p54_parse_eeprom(dev, (void *) eeprom->data,
-				       (int)eeprom->size);
-		release_firmware(eeprom);
-	}
-	return ret;
+	return drvdata_request("3826.eeprom", &req_params, &priv->spi->dev);
 }
 
 static int p54spi_upload_firmware(struct ieee80211_hw *dev)
@@ -692,7 +712,7 @@ static int p54spi_remove(struct spi_device *spi)
 
 	gpio_free(p54spi_gpio_power);
 	gpio_free(p54spi_gpio_irq);
-	release_firmware(priv->firmware);
+	release_drvdata(priv->firmware);
 
 	mutex_destroy(&priv->mutex);
 
diff --git a/drivers/net/wireless/intersil/p54/p54spi.h b/drivers/net/wireless/intersil/p54/p54spi.h
index dfaa62aaeb07..c484536be900 100644
--- a/drivers/net/wireless/intersil/p54/p54spi.h
+++ b/drivers/net/wireless/intersil/p54/p54spi.h
@@ -119,7 +119,7 @@ struct p54s_priv {
 	struct list_head tx_pending;
 
 	enum fw_state fw_state;
-	const struct firmware *firmware;
+	const struct drvdata *firmware;
 };
 
 #endif /* P54SPI_H */
diff --git a/drivers/net/wireless/intersil/p54/p54usb.c b/drivers/net/wireless/intersil/p54/p54usb.c
index 043bd1c23c19..8870d177b7d5 100644
--- a/drivers/net/wireless/intersil/p54/p54usb.c
+++ b/drivers/net/wireless/intersil/p54/p54usb.c
@@ -15,7 +15,7 @@
 #include <linux/usb.h>
 #include <linux/pci.h>
 #include <linux/slab.h>
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 #include <linux/delay.h>
 #include <linux/crc32.h>
@@ -916,14 +916,13 @@ static int p54u_start_ops(struct p54u_priv *priv)
 	return ret;
 }
 
-static void p54u_load_firmware_cb(const struct firmware *firmware,
+static void p54u_load_firmware_cb(const struct drvdata *firmware,
 				  void *context)
 {
 	struct p54u_priv *priv = context;
 	struct usb_device *udev = priv->udev;
 	int err;
 
-	complete(&priv->fw_wait_load);
 	if (firmware) {
 		priv->fw = firmware;
 		err = p54u_start_ops(priv);
@@ -959,12 +958,14 @@ static int p54u_load_firmware(struct ieee80211_hw *dev,
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct p54u_priv *priv = dev->priv;
+	const struct drvdata_req_params req_params = {
+		SYSDATA_KEEP_ASYNC(p54u_load_firmware_cb, priv),
+	};
 	struct device *device = &udev->dev;
 	int err, i;
 
 	BUILD_BUG_ON(ARRAY_SIZE(p54u_fwlist) != __NUM_P54U_HWTYPES);
 
-	init_completion(&priv->fw_wait_load);
 	i = p54_find_type(priv);
 	if (i < 0)
 		return i;
@@ -973,9 +974,8 @@ static int p54u_load_firmware(struct ieee80211_hw *dev,
 	       p54u_fwlist[i].fw);
 
 	usb_get_dev(udev);
-	err = request_firmware_nowait(THIS_MODULE, 1, p54u_fwlist[i].fw,
-				      device, GFP_KERNEL, priv,
-				      p54u_load_firmware_cb);
+	err = drvdata_request_async(p54u_fwlist[i].fw, &req_params,
+				    device, &priv->fw_async_cookie);
 	if (err) {
 		dev_err(&priv->udev->dev, "(p54usb) cannot load firmware %s "
 					  "(%d)!\n", p54u_fwlist[i].fw, err);
@@ -1069,11 +1069,11 @@ static void p54u_disconnect(struct usb_interface *intf)
 		return;
 
 	priv = dev->priv;
-	wait_for_completion(&priv->fw_wait_load);
+	drvdata_synchronize_request(priv->fw_async_cookie);
 	p54_unregister_common(dev);
 
 	usb_put_dev(interface_to_usbdev(intf));
-	release_firmware(priv->fw);
+	release_drvdata(priv->fw);
 	p54_free_common(dev);
 }
 
diff --git a/drivers/net/wireless/intersil/p54/p54usb.h b/drivers/net/wireless/intersil/p54/p54usb.h
index a5f5f0fea3bd..56b58a1c41c1 100644
--- a/drivers/net/wireless/intersil/p54/p54usb.h
+++ b/drivers/net/wireless/intersil/p54/p54usb.h
@@ -153,10 +153,10 @@ struct p54u_priv {
 	spinlock_t lock;
 	struct sk_buff_head rx_queue;
 	struct usb_anchor submitted;
-	const struct firmware *fw;
+	const struct drvdata *fw;
 
 	/* asynchronous firmware callback */
-	struct completion fw_wait_load;
+	async_cookie_t fw_async_cookie;
 };
 
 #endif /* P54USB_H */
diff --git a/drivers/net/wireless/intersil/p54/txrx.c b/drivers/net/wireless/intersil/p54/txrx.c
index 1af7da0b386e..fd52af4735e7 100644
--- a/drivers/net/wireless/intersil/p54/txrx.c
+++ b/drivers/net/wireless/intersil/p54/txrx.c
@@ -17,7 +17,7 @@
  */
 
 #include <linux/export.h>
-#include <linux/firmware.h>
+#include <linux/drvdata.h>
 #include <linux/etherdevice.h>
 #include <asm/div64.h>
 
-- 
2.10.1

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