linux-kernel - [PATCH 3.19 040/123] serial: core: Fix iotype userspace breakage

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Message-Id: <20150324154425.888851613@linuxfoundation.org>
Date:	Tue, 24 Mar 2015 16:45:49 +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, Kevin Cernekee <cernekee@...il.com>,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH 3.19 040/123] serial: core: Fix iotype userspace breakage

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

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

From: Peter Hurley <peter@...leysoftware.com>

commit 2bb785169e9709d41220e5c18b0270883a82f85c upstream.

commit 3ffb1a8193bea ("serial: core: Add big-endian iotype")
re-numbered userspace-dependent values; ioctl(TIOCSSERIAL) can
assign the port iotype (which is expected to match the selected
i/o accessors), so iotype values must not be changed.

Cc: Kevin Cernekee <cernekee@...il.com>
Signed-off-by: Peter Hurley <peter@...leysoftware.com>
Reviewed-by: Kevin Cernekee <cernekee@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/linux/serial_core.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -146,9 +146,9 @@ struct uart_port {
 #define UPIO_HUB6		(1)			/* Hub6 ISA card */
 #define UPIO_MEM		(2)			/* 8b MMIO access */
 #define UPIO_MEM32		(3)			/* 32b little endian */
-#define UPIO_MEM32BE		(4)			/* 32b big endian */
-#define UPIO_AU			(5)			/* Au1x00 and RT288x type IO */
-#define UPIO_TSI		(6)			/* Tsi108/109 type IO */
+#define UPIO_AU			(4)			/* Au1x00 and RT288x type IO */
+#define UPIO_TSI		(5)			/* Tsi108/109 type IO */
+#define UPIO_MEM32BE		(6)			/* 32b big endian */
 
 	unsigned int		read_status_mask;	/* driver specific */
 	unsigned int		ignore_status_mask;	/* driver specific */


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