lkml.org 
[lkml]   [2009]   [Nov]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] pxa: make index mfp unsigned in mfp_read() and write()
When signed, it is possible in theory to pass a negative mfp,
and read/write outside the array bounds.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
---
arch/arm/plat-pxa/include/plat/mfp.h | 4 ++--
arch/arm/plat-pxa/mfp.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
I did not observe the passing of a negative mfp anywhere so this
can be considered as a cleanup. Alternatively I could introduce
a `mfp < 0' check in mfp_{read,write} instead if desired.
diff --git a/arch/arm/plat-pxa/include/plat/mfp.h b/arch/arm/plat-pxa/include/plat/mfp.h
index 22086e6..0743f4a 100644
--- a/arch/arm/plat-pxa/include/plat/mfp.h
+++ b/arch/arm/plat-pxa/include/plat/mfp.h
@@ -458,8 +458,8 @@ void __init mfp_init_addr(struct mfp_addr_map *map);
* mfp_config_lpm() - configuring all low power MFPR registers for suspend
* mfp_config_run() - configuring all run time MFPR registers after resume
*/
-unsigned long mfp_read(int mfp);
-void mfp_write(int mfp, unsigned long mfpr_val);
+unsigned long mfp_read(unsigned mfp);
+void mfp_write(unsigned mfp, unsigned long mfpr_val);
void mfp_config(unsigned long *mfp_cfgs, int num);
void mfp_config_run(void);
void mfp_config_lpm(void);
diff --git a/arch/arm/plat-pxa/mfp.c b/arch/arm/plat-pxa/mfp.c
index 9405d03..c80d0db 100644
--- a/arch/arm/plat-pxa/mfp.c
+++ b/arch/arm/plat-pxa/mfp.c
@@ -203,7 +203,7 @@ void mfp_config(unsigned long *mfp_cfgs, int num)
spin_unlock_irqrestore(&mfp_spin_lock, flags);
}

-unsigned long mfp_read(int mfp)
+unsigned long mfp_read(unsigned mfp)
{
unsigned long val, flags;

@@ -216,7 +216,7 @@ unsigned long mfp_read(int mfp)
return val;
}

-void mfp_write(int mfp, unsigned long val)
+void mfp_write(unsigned mfp, unsigned long val)
{
unsigned long flags;


\
 
 \ /
  Last update: 2009-11-11 16:57    [from the cache]
©2003-2011 Jasper Spaans