video: pxa3xx-gcu: Return -EFAULT when copy_from_user() fails
Return -EFAULT instead of number of bytes that could not be copied if copy_from_user() fails. Also fix a typo in the comments. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -1,5 +1,5 @@
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/*
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* pxa3xx-gc.c - Linux kernel module for PXA3xx graphics controllers
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* pxa3xx-gcu.c - Linux kernel module for PXA3xx graphics controllers
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*
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* This driver needs a DirectFB counterpart in user space, communication
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* is handled via mmap()ed memory areas and an ioctl.
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@ -421,7 +421,7 @@ pxa3xx_gcu_misc_write(struct file *filp, const char *buff,
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buffer->next = priv->free;
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priv->free = buffer;
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spin_unlock_irqrestore(&priv->spinlock, flags);
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return ret;
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return -EFAULT;
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}
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buffer->length = words;
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