pata_at91: fix resource release

Julias Lawall discovered that pata_at91 wasn't freeing a memory region
allocated with kzalloc() on init failure paths.  Upon review,
pata_at91 also seems to be doing unnecessary explicit resource
releases for managed resources too.  Convert memory allocation to
managed one and drop unnecessary explicit resource releases.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Julia Lawall <julia@diku.dk>
Cc: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/pata_at91.c b/drivers/ata/pata_at91.c
index 5702aff..41c94b1 100644 (file)
--- a/drivers/ata/pata_at91.c
+++ b/drivers/ata/pata_at91.c
@@ -250,7 +250,7 @@ static int __devinit pata_at91_probe(struct platform_device *pdev)
                ata_port_desc(ap, "no IRQ, using PIO polling");
        }
 
-       info = kzalloc(sizeof(*info), GFP_KERNEL);
+       info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 
        if (!info) {
                dev_err(dev, "failed to allocate memory for private data\n");
@@ -275,7 +275,7 @@ static int __devinit pata_at91_probe(struct platform_device *pdev)
        if (!info->ide_addr) {
                dev_err(dev, "failed to map IO base\n");
                ret = -ENOMEM;
-               goto err_ide_ioremap;
+               goto err_put;
        }
 
        info->alt_addr = devm_ioremap(dev,
@@ -284,7 +284,7 @@ static int __devinit pata_at91_probe(struct platform_device *pdev)
        if (!info->alt_addr) {
                dev_err(dev, "failed to map CTL base\n");
                ret = -ENOMEM;
-               goto err_alt_ioremap;
+               goto err_put;
        }
 
        ap->ioaddr.cmd_addr = info->ide_addr;
@@ -303,13 +303,8 @@ static int __devinit pata_at91_probe(struct platform_device *pdev)
                        irq ? ata_sff_interrupt : NULL,
                        irq_flags, &pata_at91_sht);
 
-err_alt_ioremap:
-       devm_iounmap(dev, info->ide_addr);
-
-err_ide_ioremap:
+err_put:
        clk_put(info->mck);
-       kfree(info);
-
        return ret;
 }
 
@@ -317,7 +312,6 @@ static int __devexit pata_at91_remove(struct platform_device *pdev)
 {
        struct ata_host *host = dev_get_drvdata(&pdev->dev);
        struct at91_ide_info *info;
-       struct device *dev = &pdev->dev;
 
        if (!host)
                return 0;
@@ -328,11 +322,8 @@ static int __devexit pata_at91_remove(struct platform_device *pdev)
        if (!info)
                return 0;
 
-       devm_iounmap(dev, info->ide_addr);
-       devm_iounmap(dev, info->alt_addr);
        clk_put(info->mck);
 
-       kfree(info);
        return 0;
 }