From 2476b4d0426e1d6d4a42b2f7ae08f668b2cfe510 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Thu, 3 Jul 2008 11:31:55 -0500 Subject: [PATCH] [SCSI] fix locking in host use of blk_plug_device() scsi_lib.c:scsi_host_queue_ready() plugs the device with incorrect locking. It should actually have the queue lock held, but it's holding the host lock. Fix this by eliminating the call. The host ready has no need to plug the queue because if it returns 0 in scsi_request_function control transfers to not_ready which acquires the queue lock and plugs the device if its at zero depth. Reported-by: Elias Oltmanns Signed-off-by: James Bottomley --- drivers/scsi/scsi_lib.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index aa8d5de58839..0451903452e6 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1328,7 +1328,6 @@ static inline int scsi_host_queue_ready(struct request_queue *q, printk("scsi%d unblocking host at zero depth\n", shost->host_no)); } else { - blk_plug_device(q); return 0; } } -- 2.20.1