From cdb32706f6948238ed6d1d85473c64c27366e9e9 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Thu, 22 Nov 2007 21:26:01 +0100 Subject: plip: fix parport_register_device name parameter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Plip passes a string "name" that is allocated on stack to parport_register_device. parport_register_device holds the pointer to "name" and when the registering function exits, it points nowhere. On some machine, this bug causes bad names to appear in /proc, such as /proc/sys/dev/parport/parport0/devices/T^/�X^/�, on others, the plip proc node is completely missing. The patch also fixes documentation to note this requirement. Signed-off-by: Mikulas Patocka Signed-off-by: Linus Torvalds --- Documentation/parport-lowlevel.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/parport-lowlevel.txt') diff --git a/Documentation/parport-lowlevel.txt b/Documentation/parport-lowlevel.txt index 265fcdcb8e5f..120eb20dbb09 100644 --- a/Documentation/parport-lowlevel.txt +++ b/Documentation/parport-lowlevel.txt @@ -339,6 +339,10 @@ Use this function to register your device driver on a parallel port ('port'). Once you have done that, you will be able to use parport_claim and parport_release in order to use the port. +The ('name') argument is the name of the device that appears in /proc +filesystem. The string must be valid for the whole lifetime of the +device (until parport_unregister_device is called). + This function will register three callbacks into your driver: 'preempt', 'wakeup' and 'irq'. Each of these may be NULL in order to indicate that you do not want a callback. -- cgit