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checkpatch: usb_free_urb() can take NULL

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usb_free_urb() can take a NULL, so let's check and warn about that.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Greg Kroah-Hartman 2008-07-23 21:29:04 -07:00 committed by Linus Torvalds
parent f5fe35dd95
commit 4c432a8f01
1 changed files with 7 additions and 0 deletions
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7
scripts/checkpatch.pl
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@ -2078,6 +2078,13 @@ sub process {
WARN("kfree(NULL) is safe this check is probabally not required\n" . $hereprev);
}
}
# check for needless usb_free_urb() checks
if ($prevline =~ /\bif\s*\(([^\)]*)\)/) {
my $expr = $1;
if ($line =~ /\busb_free_urb\(\Q$expr\E\);/) {
WARN("usb_free_urb(NULL) is safe this check is probably not required\n" . $hereprev);
}
}
# warn about #ifdefs in C files
# if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) {