spi/omap2_mcspi: Check params before dereference or use (99f1a43f) · Commits · 戴 / test

drivers/spi/omap2_mcspi.c

+11 −8

Original line number	Diff line number	Diff line
		@@ -834,7 +834,6 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
		struct omap2_mcspi_cs *cs;

		mcspi = spi_master_get_devdata(spi->master);
		mcspi_dma = &mcspi->dma_channels[spi->chip_select];

		if (spi->controller_state) {
		/* Unlink controller state from context save list */
		@@ -844,6 +843,9 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
		kfree(spi->controller_state);
		}

		if (spi->chip_select < spi->master->num_chipselect) {
		mcspi_dma = &mcspi->dma_channels[spi->chip_select];

		if (mcspi_dma->dma_rx_channel != -1) {
		omap_free_dma(mcspi_dma->dma_rx_channel);
		mcspi_dma->dma_rx_channel = -1;
		@@ -853,6 +855,7 @@ static void omap2_mcspi_cleanup(struct spi_device *spi)
		mcspi_dma->dma_tx_channel = -1;
		}
		}
		}

		static void omap2_mcspi_work(struct work_struct *work)
		{