powerpc: handle error case in cpm_muram_alloc()
rh_alloc() returns (unsigned long)-ERRxx on error, which may result in overwriting memory outside the MURAM AREA. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Scott Wood <scottwood@freescale.com>
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@ -147,7 +147,8 @@ unsigned long cpm_muram_alloc(unsigned long size, unsigned long align)
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spin_lock_irqsave(&cpm_muram_lock, flags);
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spin_lock_irqsave(&cpm_muram_lock, flags);
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cpm_muram_info.alignment = align;
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cpm_muram_info.alignment = align;
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start = rh_alloc(&cpm_muram_info, size, "commproc");
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start = rh_alloc(&cpm_muram_info, size, "commproc");
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memset_io(cpm_muram_addr(start), 0, size);
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if (!IS_ERR_VALUE(start))
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memset_io(cpm_muram_addr(start), 0, size);
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spin_unlock_irqrestore(&cpm_muram_lock, flags);
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spin_unlock_irqrestore(&cpm_muram_lock, flags);
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return start;
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return start;
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