Commits
Heikki Krogerus committed 7fb8c56c7fa
serial: 8250_dw: provide a filter for DMA channel detection The channel IDs are set to -1 by default. It will prevent dmaengine from trying to provide the first free channel if it fails to allocate exclusive channel. This will fix an issue with ACPI enumerated UARTs that do not support DMA but still end up getting a DMA channel incorrectly. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>