linux-kernel - [PATCH 05/15] flash_read should update ppos instead of file->f

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Date:	Fri, 20 Nov 2009 17:40:35 +0100
From:	Jan Blunck <jblunck@...e.de>
To:	linux-fsdevel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Linux-Kernel Mailinglist <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>, jkacur@...hat.com,
	Arnd Bergmann <arnd@...db.de>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Jamie Lokier <jamie@...reable.org>,
	Jan Blunck <jblunck@...e.de>
Subject: [PATCH 05/15] flash_read should update ppos instead of file->f_pos

flash_read() updates file->f_pos directly instead of the ppos given. The
VFS later updates the file->f_pos and overwrites it with the unchanged
value of ppos.

Signed-off-by: Jan Blunck <jblunck@...e.de>
---
 drivers/sbus/char/flash.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/sbus/char/flash.c b/drivers/sbus/char/flash.c
index 4108347..12cd438 100644
--- a/drivers/sbus/char/flash.c
+++ b/drivers/sbus/char/flash.c
@@ -106,9 +106,9 @@ static ssize_t
 flash_read(struct file * file, char __user * buf,
 	   size_t count, loff_t *ppos)
 {
-	unsigned long p = file->f_pos;
+	loff_t p = *ppos;
 	int i;
-	
+
 	if (count > flash.read_size - p)
 		count = flash.read_size - p;
 
@@ -119,7 +119,7 @@ flash_read(struct file * file, char __user * buf,
 		buf++;
 	}
 
-	file->f_pos += count;
+	*ppos += count;
 	return count;
 }
 
-- 
1.6.4.2

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