linux-kernel - [PATCH 4.4 138/193] serial: 8250

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Date:   Fri, 23 Feb 2018 19:26:11 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kbuild test robot <fengguang.wu@...el.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Subject: [PATCH 4.4 138/193] serial: 8250_mid: fix broken DMA dependency

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

commit 0ff4230584320b2153752ba54e2e8edbd6addf2c upstream.

In order to enable HSU DMA PCI driver, the HSU DMA Engine
must be enabled. This add a check for that.

Reported-by: kbuild test robot <fengguang.wu@...el.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/tty/serial/8250/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -372,7 +372,7 @@ config SERIAL_8250_MID
 	tristate "Support for serial ports on Intel MID platforms"
 	depends on SERIAL_8250 && PCI
 	select HSU_DMA if SERIAL_8250_DMA
-	select HSU_DMA_PCI if X86_INTEL_MID
+	select HSU_DMA_PCI if (HSU_DMA && X86_INTEL_MID)
 	select RATIONAL
 	help
 	  Selecting this option will enable handling of the extra features