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spi: fsl-cpm: Correct the free:ing 

The fsl_spi_cpm_free() function does not make the same
checks as the error path in fsl_spi_cpm_init() leading
to crashes on error.

Cc: Fabio Estevam <festevam@gmail.com>
Reported-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191113014442.12100-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
alistair/sunxi64-5.5-dsi
Linus Walleij 2019-11-13 02:44:42 +01:00 committed by Mark Brown
parent c2f102f1e8
commit c5923243eb
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 1 deletions
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drivers/spi/spi-fsl-cpm.c
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@ -392,7 +392,8 @@ void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi)
dma_unmap_single(dev, mspi->dma_dummy_rx, SPI_MRBLR, DMA_FROM_DEVICE);
dma_unmap_single(dev, mspi->dma_dummy_tx, PAGE_SIZE, DMA_TO_DEVICE);
cpm_muram_free(cpm_muram_offset(mspi->tx_bd));
cpm_muram_free(cpm_muram_offset(mspi->pram));
if (!(mspi->flags & SPI_CPM1))
cpm_muram_free(cpm_muram_offset(mspi->pram));
fsl_spi_free_dummy_rx();
}
EXPORT_SYMBOL_GPL(fsl_spi_cpm_free);