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Subject[PATCH 15/23] checkpatch: usb_free_urb() can take NULL
Date
From: Greg Kroah-Hartman <gregkh@suse.de>

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>
---
scripts/checkpatch.pl | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 13d7a33..a4e8087 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -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$/)) {
--
1.5.6.rc0.140.ga9675


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