From: Cengiz Can <cengiz@kernel.wtf>
To: kbusch@kernel.org
Cc: Chaitanya.Kulkarni@wdc.com, axboe@kernel.dk, helgaas@kernel.org,
jack@suse.cz, linux-block@vger.kernel.org,
stable@vger.kernel.org, tristmd@gmail.com,
Cengiz Can <cengiz@kernel.wtf>
Subject: Re: [PATCH] blktrace: Protect q->blk_trace with RCU
Date: Tue, 3 Mar 2020 14:07:32 +0300 [thread overview]
Message-ID: <20200303110731.65552-1-cengiz@kernel.wtf> (raw)
In-Reply-To: <20200302220639.GA2393@dhcp-10-100-145-180.wdl.wdc.com>
Added a reassignment into the NULL check block to fix the issue.
Fixes: c780e86dd48 ("blktrace: Protect q->blk_trace with RCU")
Signed-off-by: Cengiz Can <cengiz@kernel.wtf>
---
kernel/trace/blktrace.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 4560878f0bac..29ea88f10b87 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1896,8 +1896,10 @@ static ssize_t sysfs_blk_trace_attr_store(struct device *dev,
}
ret = 0;
- if (bt == NULL)
+ if (bt == NULL) {
ret = blk_trace_setup_queue(q, bdev);
+ bt = q->blk_trace;
+ }
if (ret == 0) {
if (attr == &dev_attr_act_mask)
--
2.25.1
next prev parent reply other threads:[~2020-03-03 11:09 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-06 14:28 [PATCH] blktrace: Protect q->blk_trace with RCU Jan Kara
2020-02-06 18:46 ` Chaitanya Kulkarni
2020-02-06 18:49 ` Jens Axboe
2020-02-06 19:37 ` Chaitanya Kulkarni
2020-02-10 0:38 ` Chaitanya Kulkarni
2020-02-10 2:19 ` Ming Lei
2020-02-10 3:54 ` Bart Van Assche
2020-02-19 12:59 ` Jan Kara
2020-02-25 10:20 ` Ming Lei
2020-02-25 15:40 ` Jens Axboe
2020-03-02 20:40 ` Bjorn Helgaas
2020-03-02 21:19 ` Chaitanya Kulkarni
2020-03-02 21:59 ` Bjorn Helgaas
2020-03-02 22:06 ` Keith Busch
2020-03-03 11:07 ` Cengiz Can [this message]
2020-03-03 12:17 ` Greg KH
2020-03-05 1:51 ` Ming Lei
2020-03-05 4:27 ` Cengiz Can
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