spi: rspi: Add spi_master_get() call to prevent use after free
In rspi_remove(), current code dereferences rspi after spi_unregister_master(),
thus add an extra spi_master_get() call is necessary to prevent use after free.
Current code already has an extra spi_master_put() call in rspi_remove(), so
this patch just adds a spi_master_get() call rather than a spi_master_get() with
spi_master_put() calls.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 00c3232..49ae72a 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -726,7 +726,7 @@
static int rspi_remove(struct platform_device *pdev)
{
- struct rspi_data *rspi = platform_get_drvdata(pdev);
+ struct rspi_data *rspi = spi_master_get(platform_get_drvdata(pdev));
spi_unregister_master(rspi->master);
rspi_release_dma(rspi);