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 <li...@roeck-us.net>
---
drivers/spi/spi-mpc512x-psc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi-mpc512x-psc.c b/drivers/spi/spi-mpc512x-psc.c
index 4c63f77..0a1e39e 100644
--- a/drivers/spi/spi-mpc512x-psc.c
+++ b/drivers/spi/spi-mpc512x-psc.c
@@ -494,7 +494,7 @@ free_master:
static int __devexit mpc512x_psc_spi_do_remove(struct device *dev)
{
- struct spi_master *master = dev_get_drvdata(dev);
+ struct spi_master *master = spi_master_get(dev_get_drvdata(dev));
struct mpc512x_psc_spi *mps = spi_master_get_devdata(master);
flush_workqueue(mps->workqueue);
@@ -503,6 +503,7 @@ static int __devexit mpc512x_psc_spi_do_remove(struct
device *dev)
free_irq(mps->irq, mps);
if (mps->psc)
iounmap(mps->psc);
+ spi_master_put(master);
return 0;
}
--
1.7.9.7
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