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authorAndy Whitcroft <apw@canonical.com>2010-10-26 21:23:14 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-26 23:52:20 (GMT)
commit53a3c4487a05b8f26ef72fe434a750a3402c998f (patch)
treedfe0b1f85cbf1082ceb52b71bb157cc715e22293 /scripts
parent9446ef569c288e683225fec8337a0b2b81e75cc5 (diff)
checkpatch: returning errno typically should be negative
Add a (strict mode only) test to check for non-negative returns of what appear to be errno values as the majority case these should indeed be negative. Suggested-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/checkpatch.pl7
1 files changed, 7 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3cec299..bcdb54b 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2204,6 +2204,13 @@ sub process {
ERROR("space required before the open parenthesis '('\n" . $herecurr);
}
}
+# Return of what appears to be an errno should normally be -'ve
+ if ($line =~ /^.\s*return\s*(E[A-Z]*)\s*;/) {
+ my $name = $1;
+ if ($name ne 'EOF' && $name ne 'ERROR') {
+ WARN("return of an errno should typically be -ve (return -$1)\n" . $herecurr);
+ }
+ }
# Need a space before open parenthesis after if, while etc
if ($line=~/\b(if|while|for|switch)\(/) {

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