Messages in this thread Patch in this message | | | From | Prakruthi Deepak Heragu <> | Subject | [PATCH v1] checkpatch: Check for invalid return codes | Date | Tue, 3 Jul 2018 16:41:45 -0700 |
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The only valid integer return is 0, anything else following "return" should be -ERRCODE or a function. Also, display context so that the user knows where the return value is incorrect.
http://lkml.org/lkml/2010/7/23/318 There's lots of "return -1;" statements in this patch - it's obscene that this is used to indicate "some error occurred" in kernel space rather than a real errno value - even when an existing function (eg, request_irq) gave you an error code already.
Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org> Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org> Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org> --- Changes in v1: - Use CHK instead of ERROR - Rephrase the warning message - Provide the file name and line number where return value is incorrect
scripts/checkpatch.pl | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index a9c0550..2808c27 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -6197,6 +6197,12 @@ sub process { "switch default: should use break\n" . $herectx); } +# check for return codes on error paths + if ($line =~ /\breturn\s+-\d+/) { + CHK("NO_ERROR_CODE", + "invalid return value, please return -<APPROPRIATE_ERRNO>\n" . $herecurr); + } + # check for gcc specific __FUNCTION__ if ($line =~ /\b__FUNCTION__\b/) { if (WARN("USE_FUNC", -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
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