linux-kernel - [PATCH v1 1/1] mei: me: use managed functions pcim_* and devm

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Message-Id: <1454335233-122281-1-git-send-email-andriy.shevchenko@linux.intel.com>
Date:	Mon,  1 Feb 2016 16:00:33 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Tomas Winkler <tomas.winkler@...el.com>,
	linux-kernel@...r.kernel.org
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] mei: me: use managed functions pcim_* and devm_*

This makes the error handling much more simpler than open-coding everything and
in addition makes the probe function smaller an tidier.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/misc/mei/hw-me.c  |  4 ++--
 drivers/misc/mei/pci-me.c | 40 ++++++++--------------------------------
 2 files changed, 10 insertions(+), 34 deletions(-)

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 25b1997..e26c4f4 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1336,8 +1336,8 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev,
 	struct mei_device *dev;
 	struct mei_me_hw *hw;
 
-	dev = kzalloc(sizeof(struct mei_device) +
-			 sizeof(struct mei_me_hw), GFP_KERNEL);
+	dev = devm_kzalloc(&pdev->dev, sizeof(struct mei_device) +
+				       sizeof(struct mei_me_hw), GFP_KERNEL);
 	if (!dev)
 		return NULL;
 	hw = to_me_hw(dev);
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 75fc9c6..3c07a02 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -142,7 +142,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return -ENODEV;
 
 	/* enable pci dev */
-	err = pci_enable_device(pdev);
+	err = pcim_enable_device(pdev);
 	if (err) {
 		dev_err(&pdev->dev, "failed to enable pci device.\n");
 		goto end;
@@ -153,7 +153,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	err = pci_request_regions(pdev, KBUILD_MODNAME);
 	if (err) {
 		dev_err(&pdev->dev, "failed to get pci regions.\n");
-		goto disable_device;
+		goto end;
 	}
 
 	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) ||
@@ -166,23 +166,22 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 	if (err) {
 		dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
-		goto release_regions;
+		goto end;
 	}
 
-
 	/* allocates and initializes the mei dev structure */
 	dev = mei_me_dev_init(pdev, cfg);
 	if (!dev) {
 		err = -ENOMEM;
-		goto release_regions;
+		goto end;
 	}
 	hw = to_me_hw(dev);
 	/* mapping  IO device memory */
-	hw->mem_addr = pci_iomap(pdev, 0, 0);
+	hw->mem_addr = pcim_iomap(pdev, 0, 0);
 	if (!hw->mem_addr) {
 		dev_err(&pdev->dev, "mapping I/O device memory failure.\n");
 		err = -ENOMEM;
-		goto free_device;
+		goto end;
 	}
 	pci_enable_msi(pdev);
 
@@ -196,7 +195,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (err) {
 		dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
 		       pdev->irq);
-		goto disable_msi;
+		goto end;
 	}
 
 	if (mei_start(dev)) {
@@ -235,15 +234,6 @@ release_irq:
 	mei_cancel_work(dev);
 	mei_disable_interrupts(dev);
 	free_irq(pdev->irq, dev);
-disable_msi:
-	pci_disable_msi(pdev);
-	pci_iounmap(pdev, hw->mem_addr);
-free_device:
-	kfree(dev);
-release_regions:
-	pci_release_regions(pdev);
-disable_device:
-	pci_disable_device(pdev);
 end:
 	dev_err(&pdev->dev, "initialization failed.\n");
 	return err;
@@ -260,7 +250,6 @@ end:
 static void mei_me_remove(struct pci_dev *pdev)
 {
 	struct mei_device *dev;
-	struct mei_me_hw *hw;
 
 	dev = pci_get_drvdata(pdev);
 	if (!dev)
@@ -269,9 +258,6 @@ static void mei_me_remove(struct pci_dev *pdev)
 	if (mei_pg_is_enabled(dev))
 		pm_runtime_get_noresume(&pdev->dev);
 
-	hw = to_me_hw(dev);
-
-
 	dev_dbg(&pdev->dev, "stop\n");
 	mei_stop(dev);
 
@@ -282,20 +268,10 @@ static void mei_me_remove(struct pci_dev *pdev)
 	mei_disable_interrupts(dev);
 
 	free_irq(pdev->irq, dev);
-	pci_disable_msi(pdev);
-
-	if (hw->mem_addr)
-		pci_iounmap(pdev, hw->mem_addr);
 
 	mei_deregister(dev);
-
-	kfree(dev);
-
-	pci_release_regions(pdev);
-	pci_disable_device(pdev);
-
-
 }
+
 #ifdef CONFIG_PM_SLEEP
 static int mei_me_pci_suspend(struct device *device)
 {
-- 
2.7.0