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/dev/mem: remove redundant test on len
The len test in write_kmem() is always true, so can be reduced. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1 changed files with 6 additions and 8 deletions
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@ -581,14 +581,12 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
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if (len > PAGE_SIZE)
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len = PAGE_SIZE;
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if (len) {
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written = copy_from_user(kbuf, buf, len);
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if (written) {
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if (wrote + virtr)
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break;
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free_page((unsigned long)kbuf);
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return -EFAULT;
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}
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written = copy_from_user(kbuf, buf, len);
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if (written) {
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if (wrote + virtr)
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break;
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free_page((unsigned long)kbuf);
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return -EFAULT;
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}
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len = vwrite(kbuf, (char *)p, len);
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count -= len;
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