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spi: Fixes for v3.19

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A couple of driver specific fixes:
 
  - Disable DMA mode for i.MX6DL chips due to a hardware bug.
  - Don't use devm_kzalloc() outside of bind/unbind paths in the fsl-dspi
    driver, fixing memory leaks.
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Merge tag 'spi-v3.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A couple of driver specific fixes:

   - Disable DMA mode for i.MX6DL chips due to a hardware bug.

   - Don't use devm_kzalloc() outside of bind/unbind paths in the
     fsl-dspi driver, fixing memory leaks"

* tag 'spi-v3.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: imx: use pio mode for i.mx6dl
  spi: spi-fsl-dspi: Remove usage of devm_kzalloc
This commit is contained in:
Linus Torvalds 2015-02-05 11:07:25 -08:00
commit d445d46d7b
2 changed files with 16 additions and 2 deletions
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14
drivers/spi/spi-fsl-dspi.c
View file

@ -342,8 +342,7 @@ static int dspi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
/* Only alloc on first setup */
chip = spi_get_ctldata(spi);
if (chip == NULL) {
chip = devm_kzalloc(&spi->dev, sizeof(struct chip_data),
GFP_KERNEL);
chip = kzalloc(sizeof(struct chip_data), GFP_KERNEL);
if (!chip)
return -ENOMEM;
}
@ -382,6 +381,16 @@ static int dspi_setup(struct spi_device *spi)
return dspi_setup_transfer(spi, NULL);
}
static void dspi_cleanup(struct spi_device *spi)
{
struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi);
dev_dbg(&spi->dev, "spi_device %u.%u cleanup\n",
spi->master->bus_num, spi->chip_select);
kfree(chip);
}
static irqreturn_t dspi_interrupt(int irq, void *dev_id)
{
struct fsl_dspi *dspi = (struct fsl_dspi *)dev_id;
@ -467,6 +476,7 @@ static int dspi_probe(struct platform_device *pdev)
dspi->bitbang.master->setup = dspi_setup;
dspi->bitbang.master->dev.of_node = pdev->dev.of_node;
master->cleanup = dspi_cleanup;
master->mode_bits = SPI_CPOL | SPI_CPHA;
master->bits_per_word_mask = SPI_BPW_MASK(4) | SPI_BPW_MASK(8) |
SPI_BPW_MASK(16);

4
drivers/spi/spi-imx.c
View file

@ -823,6 +823,10 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
struct dma_slave_config slave_config = {};
int ret;
/* use pio mode for i.mx6dl chip TKT238285 */
if (of_machine_is_compatible("fsl,imx6dl"))
return 0;
/* Prepare for TX DMA: */
master->dma_tx = dma_request_slave_channel(dev, "tx");
if (!master->dma_tx) {