From e7be5403ad45264226de5fbd836013db464113a0 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linuxfoundation.org>
Date: Fri, 23 Nov 2007 15:26:19 -0500
Subject: [PATCH] Import 2.3.11

---
 drivers/misc/parport_ieee1284.c | 38 +++++++++++++++++++++++++++++---------
 fs/exec.c                       |  2 +-
 include/linux/parport.h         |  5 +++++
 3 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/drivers/misc/parport_ieee1284.c b/drivers/misc/parport_ieee1284.c
index e3f27fd03..de7a269c2 100644
--- a/drivers/misc/parport_ieee1284.c
+++ b/drivers/misc/parport_ieee1284.c
@@ -220,7 +220,7 @@ int parport_negotiate (struct parport *port, int mode)
 	printk (KERN_ERR "parport: IEEE1284 not supported in this kernel\n");
 	return -1;
 #else
-	int m = mode;
+	int m = mode & ~IEEE1284_ADDR;
 	unsigned char xflag;
 
 	port = port->physport;
@@ -229,6 +229,12 @@ int parport_negotiate (struct parport *port, int mode)
 	if (port->ieee1284.mode == mode)
 		return 0;
 
+	/* Is the difference just an address-or-not bit? */
+	if ((port->ieee1284.mode & ~IEEE1284_ADDR) == (mode & ~IEEE1284_ADDR)){
+		port->ieee1284.mode = mode;
+		return 0;
+	}
+
 	/* Go to compability forward idle mode */
 	if (port->ieee1284.mode != IEEE1284_MODE_COMPAT)
 		parport_ieee1284_terminate (port);
@@ -409,10 +415,11 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
 #else
 	ssize_t retval;
 	int mode = port->ieee1284.mode;
+	int addr = mode & IEEE1284_ADDR;
 	size_t (*fn) (struct parport *, const void *, size_t, int);
 
-	/* Ignore the device-ID-request bit. */
-	mode &= ~IEEE1284_DEVICEID;
+	/* Ignore the device-ID-request bit and the address bit. */
+	mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
 
 	/* Use the mode we're in. */
 	switch (mode) {
@@ -426,13 +433,19 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
 
 	case IEEE1284_MODE_EPP:
 		DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name);
-		fn = port->ops->epp_write_data;
+		if (addr)
+			fn = port->ops->epp_write_addr;
+		else
+			fn = port->ops->epp_write_data;
 		break;
 
 	case IEEE1284_MODE_ECP:
 	case IEEE1284_MODE_ECPRLE:
 		DPRINTK (KERN_DEBUG "%s: Using ECP mode\n", port->name);
-		fn = port->ops->ecp_write_data;
+		if (addr)
+			fn = port->ops->ecp_write_addr;
+		else
+			fn = port->ops->ecp_write_data;
 		break;
 
 	case IEEE1284_MODE_ECPSWE:
@@ -440,7 +453,10 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
 			 port->name);
 		/* The caller has specified that it must be emulated,
 		 * even if we have ECP hardware! */
-		fn = parport_ieee1284_ecp_write_data;
+		if (addr)
+			fn = parport_ieee1284_ecp_write_addr;
+		else
+			fn = parport_ieee1284_ecp_write_data;
 		break;
 
 	default:
@@ -464,10 +480,11 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
 	return -ENODEV;
 #else
 	int mode = port->physport->ieee1284.mode;
+	int addr = mode & IEEE1284_ADDR;
 	size_t (*fn) (struct parport *, void *, size_t, int);
 
-	/* Ignore the device-ID-request bit. */
-	mode &= ~IEEE1284_DEVICEID;
+	/* Ignore the device-ID-request bit and the address bit. */
+	mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR);
 
 	/* Use the mode we're in. */
 	switch (mode) {
@@ -486,7 +503,10 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
 
 	case IEEE1284_MODE_EPP:
 		DPRINTK (KERN_DEBUG "%s: Using EPP mode\n", port->name);
-		fn = port->ops->epp_read_data;
+		if (addr)
+			fn = port->ops->epp_read_addr;
+		else
+			fn = port->ops->epp_read_data;
 		break;
 
 	case IEEE1284_MODE_ECP:
diff --git a/fs/exec.c b/fs/exec.c
index 131a15ab5..debc7ed04 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -365,7 +365,7 @@ end_readexec:
 
 static int exec_mmap(void)
 {
-	struct mm_struct * mm, * old_mm, * active_mm;
+	struct mm_struct * mm, * old_mm;
 
 	old_mm = current->mm;
 	if (old_mm && atomic_read(&old_mm->mm_users) == 1) {
diff --git a/include/linux/parport.h b/include/linux/parport.h
index 0d65afa67..fa8db76db 100644
--- a/include/linux/parport.h
+++ b/include/linux/parport.h
@@ -70,6 +70,11 @@ typedef enum {
 #define IEEE1284_MODE_EPPSWE            (1<<12) /* Software-emulated */
 #define IEEE1284_DEVICEID               (1<<2)  /* This is a flag */
 
+/* For the benefit of parport_read/write, you can use these with
+ * parport_negotiate to use address operations.  They have no effect
+ * other than to make parport_read/write use address transfers. */
+#define IEEE1284_ADDR			(1<<13)	/* This is a flag */
+
 /* The rest is for the kernel only */
 #ifdef __KERNEL__
 
-- 
2.11.4.GIT