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authorMikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>2007-11-22 21:26:01 +0100
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-26 19:39:01 -0800
commitcdb32706f6948238ed6d1d85473c64c27366e9e9 (patch)
treebc8b267a0b861bbafae9c384cf80a03e14db8bbd
parentf6ce5cca74b8681fdf1d7307edc66a7213b43f6f (diff)
plip: fix parport_register_device name parameter
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 <mikulas@artax.karlin.mff.cuni.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/parport-lowlevel.txt4
-rw-r--r--drivers/net/plip.c2
2 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/parport-lowlevel.txt b/Documentation/parport-lowlevel.txt
index 265fcdcb8e5..120eb20dbb0 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.
diff --git a/drivers/net/plip.c b/drivers/net/plip.c
index baf2cbfc886..57c98669984 100644
--- a/drivers/net/plip.c
+++ b/drivers/net/plip.c
@@ -1269,7 +1269,7 @@ static void plip_attach (struct parport *port)
nl = netdev_priv(dev);
nl->dev = dev;
- nl->pardev = parport_register_device(port, name, plip_preempt,
+ nl->pardev = parport_register_device(port, dev->name, plip_preempt,
plip_wakeup, plip_interrupt,
0, dev);