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spi: rspi: Add spi_master_get() call to prevent use after free

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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>
This commit is contained in:
Axel Lin 2013-08-31 19:42:56 +08:00 committed by Mark Brown
parent 8d4d08ce83
commit 9d3405dbbb
1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-rspi.c
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@ -726,7 +726,7 @@ static void rspi_release_dma(struct rspi_data *rspi)
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);