serial: 8250_mid: recognize interrupt source in handler
There is a special register that shows interrupt status by source. In particular case the source can be a combination of DMA Tx, DMA Rx, and UART. Read the register and call the handlers only for sources that request an interrupt. Fixes: 6ede6dcd ("serial: 8250_mid: add support for DMA engine handling from UART MMIO") Cc: stable@vger.kernel.org Reviewed-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Showing
想要评论请 注册 或 登录