powerpc/virtex/spi: Xilinx SPI driver not releasing memory

The driver was not releasing memory when it was removed or
when there was a failure during probe. This fixes it.

Signed-off-by: John Linn <john.linn@xilinx.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index fe7e5f3..494d3f7 100644 (file)
--- a/drivers/spi/xilinx_spi.c
+++ b/drivers/spi/xilinx_spi.c
@@ -354,7 +354,7 @@ static int __init xilinx_spi_of_probe(struct of_device *ofdev,
        if (xspi->regs == NULL) {
                rc = -ENOMEM;
                dev_warn(&ofdev->dev, "ioremap failure\n");
-               goto put_master;
+               goto release_mem;
        }
        xspi->irq = r_irq->start;
 
@@ -365,7 +365,7 @@ static int __init xilinx_spi_of_probe(struct of_device *ofdev,
        prop = of_get_property(ofdev->node, "xlnx,num-ss-bits", &len);
        if (!prop || len < sizeof(*prop)) {
                dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
-               goto put_master;
+               goto unmap_io;
        }
        master->num_chipselect = *prop;
 
@@ -397,6 +397,8 @@ free_irq:
        free_irq(xspi->irq, xspi);
 unmap_io:
        iounmap(xspi->regs);
+release_mem:
+       release_mem_region(r_mem->start, resource_size(r_mem));
 put_master:
        spi_master_put(master);
        return rc;
@@ -406,6 +408,7 @@ static int __devexit xilinx_spi_remove(struct of_device *ofdev)
 {
        struct xilinx_spi *xspi;
        struct spi_master *master;
+       struct resource r_mem;
 
        master = platform_get_drvdata(ofdev);
        xspi = spi_master_get_devdata(master);
@@ -413,6 +416,8 @@ static int __devexit xilinx_spi_remove(struct of_device *ofdev)
        spi_bitbang_stop(&xspi->bitbang);
        free_irq(xspi->irq, xspi);
        iounmap(xspi->regs);
+       if (!of_address_to_resource(ofdev->node, 0, &r_mem))
+               release_mem_region(r_mem.start, resource_size(&r_mem));
        dev_set_drvdata(&ofdev->dev, 0);
        spi_master_put(xspi->bitbang.master);