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From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Eryu Guan <guaneryu@gmail.com>
Cc: Ming Lei <tom.leiming@gmail.com>,
	Linux SCSI List <linux-scsi@vger.kernel.org>,
	"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: kernel BUG at block/bio.c:1787! while initializing scsi_debug on ppc64 host
Date: Tue, 15 Dec 2015 13:29:59 -0500	[thread overview]
Message-ID: <yq1egenwons.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <20151215130631.GD19209@eguan.usersys.redhat.com> (Eryu Guan's message of "Tue, 15 Dec 2015 21:06:31 +0800")

>>>>> "Eryu" == Eryu Guan <guaneryu@gmail.com> writes:

Eryu,

Does the patch below fix the issue?

-- 
Martin K. Petersen	Oracle Linux Engineering

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 3d22fc3e3c1a..d1eb7aa78b8d 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2667,8 +2667,9 @@ static void sd_read_block_limits(struct scsi_disk *sdkp)
 
 	if (buffer[3] == 0x3c) {
 		unsigned int lba_count, desc_count;
+		u64 max_ws = get_unaligned_be64(&buffer[36]);
 
-		sdkp->max_ws_blocks = (u32)get_unaligned_be64(&buffer[36]);
+		sdkp->max_ws_blocks = (u32)max_ws;
 
 		if (!sdkp->lbpme)
 			goto out;

  parent reply	other threads:[~2015-12-15 18:30 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-11 12:01 kernel BUG at block/bio.c:1787! while initializing scsi_debug on ppc64 host Eryu Guan
2015-12-15 11:20 ` Eryu Guan
2015-12-15 12:06   ` Ming Lei
2015-12-15 13:06     ` Eryu Guan
2015-12-15 13:27       ` Ming Lei
2015-12-15 16:56         ` Eryu Guan
2015-12-16  1:15           ` Ming Lei
2015-12-16  1:39             ` Martin K. Petersen
2015-12-15 15:38       ` Ming Lei
2015-12-15 17:16         ` Eryu Guan
2015-12-15 18:29       ` Martin K. Petersen [this message]
2015-12-16  1:17         ` Ming Lei
2015-12-16  1:37           ` Martin K. Petersen
2015-12-16  7:25         ` Eryu Guan
2015-12-15 15:38   ` Martin K. Petersen
2016-01-05 11:57 ` Eryu Guan
2016-01-05 23:58   ` Martin K. Petersen
2016-01-06  3:33     ` Eryu Guan

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