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| author | Jeff Harris <jeff_harris@kentrox.com> | 2011-09-23 11:49:36 -0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-09-23 17:28:29 -0600 |
| commit | 387719c2ec995019e0af0dc537ca17c9ebd5b64f (patch) | |
| tree | 7c8761429702dc6974e016de62d25e690b4cd9fe /drivers/spi/spi-fsl-spi.c | |
| parent | 4cc122ac913dbd662403a4a173c41e0d59ab5bdd (diff) | |
| download | lwn-387719c2ec995019e0af0dc537ca17c9ebd5b64f.tar.gz lwn-387719c2ec995019e0af0dc537ca17c9ebd5b64f.zip | |
spi: Fix WARN when removing spi-fsl-spi module
If CPM mode is not used, the fsl_dummy_rx variable is never allocated. When
the cleanup attempts to free it, the reference count is zero and a WARN is
generated. The same CPM mode check used in the initialize is applied to the
free as well.
Tested on 2.6.33 with the previous spi_mpc8xxx driver. The renamed
spi-fsl-spi driver looks to have the same problem.
Signed-off-by: Jeff Harris <jeff_harris@kentrox.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/spi-fsl-spi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-spi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index d2407558773f..24cacff57786 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -825,6 +825,9 @@ static void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi) { struct device *dev = mspi->dev; + if (!(mspi->flags & SPI_CPM_MODE)) + return; + 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)); |