linux.kernel - 26 new messages in 3 topics - digest

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Today's topics:

* Char: synclink, remove unnecessary checks - 8 messages, 1 author
http://groups.google.com/group/linux.kernel/t/08c1b2b68bc4f84b?hl=en
* auxdisplay: move cfag12864bfb's probe function to .devinit.text - 17
messages, 1 author
http://groups.google.com/group/linux.kernel/t/63818dfc875730b2?hl=en
* powerpc: remove IOMMU_VMERGE config option - 1 messages, 1 author
http://groups.google.com/group/linux.kernel/t/cddcca743420ebb4?hl=en

==============================================================================
TOPIC: Char: synclink, remove unnecessary checks
http://groups.google.com/group/linux.kernel/t/08c1b2b68bc4f84b?hl=en
==============================================================================

== 1 of 8 ==
Date: Tues, Mar 2 2010 3:50 pm
From: Greg Kroah-Hartman

From: Jiri Slaby <jslaby@suse.cz>

Stanse found a potential null dereference in mgsl_put_char and
mgsl_write. There is a check for tty being NULL, but it is
dereferenced earlier.

Actually, tty cannot be NULL in .write and .put_char, so remove
the tests.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/char/synclink.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 4846b73..0658fc5 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -2031,7 +2031,7 @@ static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
return 0;

- if (!tty || !info->xmit_buf)
+ if (!info->xmit_buf)
return 0;

spin_lock_irqsave(&info->irq_spinlock, flags);
@@ -2121,7 +2121,7 @@ static int mgsl_write(struct tty_struct * tty,
if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
goto cleanup;

- if (!tty || !info->xmit_buf)
+ if (!info->xmit_buf)
goto cleanup;

if ( info->params.mode == MGSL_MODE_HDLC ||
--
1.7.0.1

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== 2 of 8 ==
Date: Tues, Mar 2 2010 4:00 pm
From: Greg Kroah-Hartman

From: Baruch Siach <baruch@tkos.co.il>

The platform code doesn't have to provide platform data to get sensible
default behaviour from the imx serial driver.

This patch does not handle NULL dereference in the IrDA case, which still
requires a valid platform data pointer (in imx_startup()/imx_shutdown()),
since I don't know whether there is a sensible default behaviour, or
should the operation just fail cleanly.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Cc: Baruch Siach <baruch@tkos.co.il>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Oskar Schirmer <os@emlix.com>
Cc: Fabian Godehardt <fg@emlix.com>
Cc: Daniel Glöckner <dg@emlix.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/serial/imx.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 60d665a..d00fcf8 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -1279,7 +1279,7 @@ static int serial_imx_probe(struct platform_device *pdev)
sport->use_irda = 1;