Commit 6915ef1c authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Vinod Koul

dmaengine: acpi: Drop double check for ACPI companion device

acpi_dev_get_resources() does perform the NULL pointer check against
ACPI companion device which is given as function parameter. Thus,
there is no need to duplicate this check in the caller.
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200622181311.67649-1-andriy.shevchenko@linux.intel.comSigned-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 999a32ef
......@@ -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,
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);
......
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