[PATCH] Xilinx: SPI: driver not releasing memory

[John Linn]

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 at xilinx.com>

---
This is an incremental patch to the patch (updated driver
for device tree) that is in the next branch.
---
 drivers/spi/xilinx_spi.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/xilinx_spi.c b/drivers/spi/xilinx_spi.c
index fe7e5f3..494d3f7 100644
--- 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);
 
-- 
1.5.3.4



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