linux-kernel - Re: [PATCH] net: dsa: rtl8366rb: add missing of_node_put after calling of_get_child_by

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Message-ID: <7835e7c0-01e5-770e-788e-5f06f9ddf35e@linux.alibaba.com>
Date:   Thu, 17 Oct 2019 13:46:38 +0800
From:   Wen Yang <wenyang@...ux.alibaba.com>
To:     David Miller <davem@...emloft.net>
Cc:     linus.walleij@...aro.org, xlpang@...ux.alibaba.com,
        zhiche.yy@...baba-inc.com, andrew@...n.ch,
        vivien.didelot@...il.com, f.fainelli@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: dsa: rtl8366rb: add missing of_node_put after
 calling of_get_child_by_name


On 2019/10/2 1:03 上午, David Miller wrote:
> From: Wen Yang <wenyang@...ux.alibaba.com>
> Date: Sun, 29 Sep 2019 15:00:47 +0800
> 
>> of_node_put needs to be called when the device node which is got
>> from of_get_child_by_name finished using.
>> irq_domain_add_linear() also calls of_node_get() to increase refcount,
>> so irq_domain will not be affected when it is released.
>>
>> fixes: d8652956cf37 ("net: dsa: realtek-smi: Add Realtek SMI driver")
>> Signed-off-by: Wen Yang <wenyang@...ux.alibaba.com>
> 
> Please capitalize Fixes:, seriously I am very curious where did you
> learned to specify the fixes tag non-capitalized?
> 
> Patch applied, t hanks.
> 

Thank you for your comments.

We checked the code repository and found that both ‘Fixes’ and ‘fixes’
are being used, such as:

commit a53651ec93a8d7ab5b26c5390e0c389048b4b4b6
…
      net: ena: don't wake up tx queue when down
…
      fixes: 1738cd3ed342 (net: ena: Add a driver for Amazon Elastic
Network Adapters (ENA))
…

And,

commit 1df379924304b687263942452836db1d725155df
…
      clk: consoldiate the __clk_get_hw() declarations
…

      Fixes: 59fcdce425b7 ("clk: Remove ifdef for COMMON_CLK in
clk-provider.h")
      fixes: 73e0e496afda ("clkdev: Always allocate a struct clk and call
__clk_get() w/ CCF")
…


It is also found that the sha1 following ‘Fixes:’ requires at least 12
digits.

So we plan to modify the checkpatch.pl script to check for these issues.


diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a85d719..ddcd2d0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2925,7 +2925,7 @@ sub process {
   		}

   # check for invalid commit id
-		if ($in_commit_log && $line =~
/(^fixes:|\bcommit)\s+([0-9a-f]{6,40})\b/i) {
+		if ($in_commit_log && $line =~ /(\bcommit)\s+([0-9a-f]{6,40})\b/i) {
   			my $id;
   			my $description;
   			($id, $description) = git_commit_info($2, undef, undef);
@@ -2935,6 +2935,25 @@ sub process {
   			}
   		}

+# check for fixes tag
+		if ($in_commit_log && $line =~ /(^fixes:)\s+([0-9a-f]{6,40})\b/i) {
+			my $id;
+			my $description;
+			($id, $description) = git_commit_info($2, undef, undef);
+			if (!defined($id)) {
+				WARN("UNKNOWN_COMMIT_ID",
+				     "Unknown commit id '$2', maybe rebased or not pulled?\n" .
$herecurr);
+			}
+			if ($1 ne "Fixes") {
+				WARN("FIXES_TAG_STYLE",
+				     "The fixes tag should be capitalized (Fixes:).\n" . $hereprev);
+			}
+			if (length($2) < 12) {
+				WARN("FIXES_TAG_STYLE",
+				     "SHA1 should be at least 12 digits long.\n" . $hereprev);
+			}
+		}
+
   # ignore non-hunk lines and lines being removed
   		next if (!$hunk_line || $line =~ /^-/);

--
Best wishes,
Wen Yang