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[ARM] pxa: ensure mfp is in correct range in mfp_{read,write} 

Ensure we do not read/write outside array boundaries with a negative index.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Roel Kluin 2009-11-13 11:37:34 +01:00 committed by Eric Miao
parent 10d5d99e88
commit 7df56c2586
1 changed files with 2 additions and 2 deletions
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4
arch/arm/plat-pxa/mfp.c
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@ -207,7 +207,7 @@ unsigned long mfp_read(int mfp)
{ {
unsigned long val, flags; unsigned long val, flags;
BUG_ON(mfp >= MFP_PIN_MAX); BUG_ON(mfp < 0 || mfp >= MFP_PIN_MAX);
spin_lock_irqsave(&mfp_spin_lock, flags); spin_lock_irqsave(&mfp_spin_lock, flags);
val = mfpr_readl(mfp_table[mfp].mfpr_off); val = mfpr_readl(mfp_table[mfp].mfpr_off);
@ -220,7 +220,7 @@ void mfp_write(int mfp, unsigned long val)
{ {
unsigned long flags; unsigned long flags;
BUG_ON(mfp >= MFP_PIN_MAX); BUG_ON(mfp < 0 || mfp >= MFP_PIN_MAX);
spin_lock_irqsave(&mfp_spin_lock, flags); spin_lock_irqsave(&mfp_spin_lock, flags);
mfpr_writel(mfp_table[mfp].mfpr_off, val); mfpr_writel(mfp_table[mfp].mfpr_off, val);