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Date:   Mon, 2 Apr 2018 13:29:51 -0700
From:   Tejun Heo <tj@kernel.org>
To:     Sitsofe Wheeler <sitsofe@gmail.com>
Cc:     Jens Axboe <axboe@kernel.dk>, linux-kernel@vger.kernel.org,
        linux-block@vger.kernel.org,
        Stefan Haberland <sth@linux.vnet.ibm.com>,
        Jan Hoeppner <hoeppner@linux.vnet.ibm.com>,
        Bart Van Assche <Bart.VanAssche@wdc.com>
Subject: Re: [BISECTED][REGRESSION] Hang while booting EeePC 900
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Hello, Sitsofe.

Can you see whether the following patch makes any difference?

Thanks.

diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index a05e367..f0e6e41 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -165,7 +165,7 @@ void blk_abort_request(struct request *req)
 		 * No need for fancy synchronizations.
 		 */
 		blk_rq_set_deadline(req, jiffies);
-		mod_timer(&req->q->timeout, 0);
+		kblockd_schedule_work(&req->q->timeout_work);
 	} else {
 		if (blk_mark_rq_complete(req))
 			return;