diff options
Diffstat (limited to 'drivers/dma/acpi-dma.c')
| -rw-r--r-- | drivers/dma/acpi-dma.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c index 8a05db3343d3..35f4804ea4af 100644 --- a/drivers/dma/acpi-dma.c +++ b/drivers/dma/acpi-dma.c @@ -358,19 +358,12 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev, { struct acpi_dma_parser_data pdata; struct acpi_dma_spec *dma_spec = &pdata.dma_spec; + struct acpi_device *adev = ACPI_COMPANION(dev); struct list_head resource_list; - struct acpi_device *adev; struct acpi_dma *adma; struct dma_chan *chan = NULL; int found; - - /* Check if the device was enumerated by ACPI */ - if (!dev) - return ERR_PTR(-ENODEV); - - adev = ACPI_COMPANION(dev); - if (!adev) - return ERR_PTR(-ENODEV); + int ret; memset(&pdata, 0, sizeof(pdata)); pdata.index = index; @@ -380,9 +373,11 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev, dma_spec->slave_id = -1; INIT_LIST_HEAD(&resource_list); - acpi_dev_get_resources(adev, &resource_list, - acpi_dma_parse_fixed_dma, &pdata); + ret = acpi_dev_get_resources(adev, &resource_list, + acpi_dma_parse_fixed_dma, &pdata); acpi_dev_free_resource_list(&resource_list); + if (ret < 0) + return ERR_PTR(ret); if (dma_spec->slave_id < 0 || dma_spec->chan_id < 0) return ERR_PTR(-ENODEV); |