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spi/tegra: Fix device remove function 

The call to spi_unregister_master() in the device remove function frees device
memory, and with it any device local data. However, device local data is still
accessed after the call to spi_unregister_master().

Acquire a reference to the SPI master device and release it after cleanup is
complete to solve the problem.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Guenter Roeck 2012-08-23 20:08:48 -07:00 committed by Mark Brown
parent 154390dcf8
commit c68025bf03
1 changed files with 3 additions and 1 deletions
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4
drivers/spi/spi-tegra.c
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@ -652,7 +652,7 @@ static int __devexit spi_tegra_remove(struct platform_device *pdev)
struct spi_tegra_data *tspi;
struct resource *r;
master = dev_get_drvdata(&pdev->dev);
master = spi_master_get(dev_get_drvdata(&pdev->dev));
tspi = spi_master_get_devdata(master);
spi_unregister_master(master);
@ -668,6 +668,8 @@ static int __devexit spi_tegra_remove(struct platform_device *pdev)
clk_put(tspi->clk);
iounmap(tspi->base);
spi_master_put(master);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(r->start, resource_size(r));