diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-03-18 18:39:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-15 11:54:59 +0200 |
| commit | 182cd3f4e0234131cdc40813e7eb734f1508f899 (patch) | |
| tree | 286a65e7f1184c6fab3dce81b124d0314f454279 /drivers/spi | |
| parent | 8a53f0f8781f09790b8314eb39d8bae1c20ada2d (diff) | |
dmaengine: idma64: Use actual device for DMA transfers
[ Upstream commit 5ba846b1ee0792f5a596b9b0b86d6e8cdebfab06 ]
Intel IOMMU, when enabled, tries to find the domain of the device,
assuming it's a PCI one, during DMA operations, such as mapping or
unmapping. Since we are splitting the actual PCI device to couple of
children via MFD framework (see drivers/mfd/intel-lpss.c for details),
the DMA device appears to be a platform one, and thus not an actual one
that performs DMA. In a such situation IOMMU can't find or allocate
a proper domain for its operations. As a result, all DMA operations are
failed.
In order to fix this, supply parent of the platform device
to the DMA engine framework and fix filter functions accordingly.
We may rely on the fact that parent is a real PCI device, because no
other configuration is present in the wild.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [for tty parts]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-pxa2xx.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index efdae686a761..9bf3e5f945c7 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1505,12 +1505,7 @@ static const struct pci_device_id pxa2xx_spi_pci_compound_match[] = { static bool pxa2xx_spi_idma_filter(struct dma_chan *chan, void *param) { - struct device *dev = param; - - if (dev != chan->device->dev->parent) - return false; - - return true; + return param == chan->device->dev; } static struct pxa2xx_spi_master * |