sata_dwc_460ex: fix resource leak on error path

DMA mapped IO should be unmapped on the error path in probe() and
unconditionally on remove().

Fixes: 62936009f35a ([libata] Add 460EX on-chip SATA driver, sata_dwc_460ex)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index c7ddef89e7b02695509a5fa3076d6953435d4b86..8e8248179d20577cf83d0270e324d1a867554554 100644 (file)
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -797,7 +797,7 @@ static int dma_dwc_init(struct sata_dwc_device *hsdev, int irq)
        if (err) {
                dev_err(host_pvt.dwc_dev, "%s: dma_request_interrupts returns"
                        " %d\n", __func__, err);
-               goto error_out;
+               return err;
        }
 
        /* Enabe DMA */
@@ -808,11 +808,6 @@ static int dma_dwc_init(struct sata_dwc_device *hsdev, int irq)
                sata_dma_regs);
 
        return 0;
-
-error_out:
-       dma_dwc_exit(hsdev);
-
-       return err;
 }
 
 static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
@@ -1662,7 +1657,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
        char *ver = (char *)&versionr;
        u8 *base = NULL;
        int err = 0;
-       int irq, rc;
+       int irq;
        struct ata_host *host;
        struct ata_port_info pi = sata_dwc_port_info[0];
        const struct ata_port_info *ppi[] = { &pi, NULL };
@@ -1725,7 +1720,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
        if (irq == NO_IRQ) {
                dev_err(&ofdev->dev, "no SATA DMA irq\n");
                err = -ENODEV;
-               goto error_out;
+               goto error_iomap;
        }
 
        /* Get physical SATA DMA register base address */
@@ -1734,14 +1729,16 @@ static int sata_dwc_probe(struct platform_device *ofdev)
                dev_err(&ofdev->dev, "ioremap failed for AHBDMA register"
                        " address\n");
                err = -ENODEV;
-               goto error_out;
+               goto error_iomap;
        }
 
        /* Save dev for later use in dev_xxx() routines */
        host_pvt.dwc_dev = &ofdev->dev;
 
        /* Initialize AHB DMAC */
-       dma_dwc_init(hsdev, irq);
+       err = dma_dwc_init(hsdev, irq);
+       if (err)
+               goto error_dma_iomap;
 
        /* Enable SATA Interrupts */
        sata_dwc_enable_interrupts(hsdev);
@@ -1759,9 +1756,8 @@ static int sata_dwc_probe(struct platform_device *ofdev)
         * device discovery process, invoking our port_start() handler &
         * error_handler() to execute a dummy Softreset EH session
         */
-       rc = ata_host_activate(host, irq, sata_dwc_isr, 0, &sata_dwc_sht);
-
-       if (rc != 0)
+       err = ata_host_activate(host, irq, sata_dwc_isr, 0, &sata_dwc_sht);
+       if (err)
                dev_err(&ofdev->dev, "failed to activate host");
 
        dev_set_drvdata(&ofdev->dev, host);
@@ -1770,7 +1766,8 @@ static int sata_dwc_probe(struct platform_device *ofdev)
 error_out:
        /* Free SATA DMA resources */
        dma_dwc_exit(hsdev);
-
+error_dma_iomap:
+       iounmap((void __iomem *)host_pvt.sata_dma_regs);
 error_iomap:
        iounmap(base);
 error_kmalloc:
@@ -1791,6 +1788,7 @@ static int sata_dwc_remove(struct platform_device *ofdev)
        /* Free SATA DMA resources */
        dma_dwc_exit(hsdev);
 
+       iounmap((void __iomem *)host_pvt.sata_dma_regs);
        iounmap(hsdev->reg_base);
        kfree(hsdev);
        kfree(host);