From d01159dffa15e3a734e43cf58c5d9f04c4106d83 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 11 Mar 2012 21:12:09 +0100 Subject: [PATCH] drivers/ata/pata_mpc52xx.c: clean up error handling code This patch makes a number of changes with respect to the error-handling code: * Remove cleanup calls for the devm functions in both the error handling code and the remove function. This cleanup is done automatically. * The previous change simplifies the cleanup code at the end of the function such that there is nothing to do on the failure of the call to devm_ioremap. So it is changed to just return directly. * There is no need for the ifs in the cleanup code at the end of the function, because in each case the cleanup needed is statically known. Drop the ifs, add new err labels, and drop the initializations of the tested variables to NULL. * Change the call to request_irq to a call to devm_request_irq, so that it is cleaned up on exit. * Cause the return value of devm_request_irq to go into the returned variable rv rather than the unused variable ret. Drop ret. Signed-off-by: Julia Lawall Signed-off-by: Jeff Garzik --- drivers/ata/pata_mpc52xx.c | 44 +++++++++++++------------------------- 1 file changed, 15 insertions(+), 29 deletions(-) diff --git a/drivers/ata/pata_mpc52xx.c b/drivers/ata/pata_mpc52xx.c index 00748ae1a016..d2c102fd4330 100644 --- a/drivers/ata/pata_mpc52xx.c +++ b/drivers/ata/pata_mpc52xx.c @@ -687,11 +687,11 @@ mpc52xx_ata_probe(struct platform_device *op) int ata_irq = 0; struct mpc52xx_ata __iomem *ata_regs; struct mpc52xx_ata_priv *priv = NULL; - int rv, ret, task_irq = 0; + int rv, task_irq; int mwdma_mask = 0, udma_mask = 0; const __be32 *prop; int proplen; - struct bcom_task *dmatsk = NULL; + struct bcom_task *dmatsk; /* Get ipb frequency */ ipb_freq = mpc5xxx_get_bus_frequency(op->dev.of_node); @@ -717,8 +717,7 @@ mpc52xx_ata_probe(struct platform_device *op) ata_regs = devm_ioremap(&op->dev, res_mem.start, sizeof(*ata_regs)); if (!ata_regs) { dev_err(&op->dev, "error mapping device registers\n"); - rv = -ENOMEM; - goto err; + return -ENOMEM; } /* @@ -753,7 +752,7 @@ mpc52xx_ata_probe(struct platform_device *op) if (!priv) { dev_err(&op->dev, "error allocating private structure\n"); rv = -ENOMEM; - goto err; + goto err1; } priv->ipb_period = 1000000000 / (ipb_freq / 1000); @@ -776,15 +775,15 @@ mpc52xx_ata_probe(struct platform_device *op) if (!dmatsk) { dev_err(&op->dev, "bestcomm initialization failed\n"); rv = -ENOMEM; - goto err; + goto err1; } task_irq = bcom_get_task_irq(dmatsk); - ret = request_irq(task_irq, &mpc52xx_ata_task_irq, 0, + rv = devm_request_irq(&op->dev, task_irq, &mpc52xx_ata_task_irq, 0, "ATA task", priv); - if (ret) { + if (rv) { dev_err(&op->dev, "error requesting DMA IRQ\n"); - goto err; + goto err2; } priv->dmatsk = dmatsk; @@ -792,7 +791,7 @@ mpc52xx_ata_probe(struct platform_device *op) rv = mpc52xx_ata_hw_init(priv); if (rv) { dev_err(&op->dev, "error initializing hardware\n"); - goto err; + goto err2; } /* Register ourselves to libata */ @@ -800,23 +799,16 @@ mpc52xx_ata_probe(struct platform_device *op) mwdma_mask, udma_mask); if (rv) { dev_err(&op->dev, "error registering with ATA layer\n"); - goto err; + goto err2; } return 0; - err: - devm_release_mem_region(&op->dev, res_mem.start, sizeof(*ata_regs)); - if (ata_irq) - irq_dispose_mapping(ata_irq); - if (task_irq) - irq_dispose_mapping(task_irq); - if (dmatsk) - bcom_ata_release(dmatsk); - if (ata_regs) - devm_iounmap(&op->dev, ata_regs); - if (priv) - devm_kfree(&op->dev, priv); + err2: + irq_dispose_mapping(task_irq); + bcom_ata_release(dmatsk); + err1: + irq_dispose_mapping(ata_irq); return rv; } @@ -835,12 +827,6 @@ mpc52xx_ata_remove(struct platform_device *op) bcom_ata_release(priv->dmatsk); irq_dispose_mapping(priv->ata_irq); - /* Clear up IO allocations */ - devm_iounmap(&op->dev, priv->ata_regs); - devm_release_mem_region(&op->dev, priv->ata_regs_pa, - sizeof(*priv->ata_regs)); - devm_kfree(&op->dev, priv); - return 0; }