From 8e03d52c7d25506622b9b22f22cb3e5e13494456 Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Wed, 6 Dec 2017 16:24:07 +0530 Subject: [PATCH] qla2xxx: Fix abort command deadlock due to spinlock Orabug: 27235104 Original code acquires hardware_lock to add Abort IOCB onto driver request queue for processing. However, abort_command() will also acquire hardware lock to look up sp pointer before issuing abort IOCB command resulting into a deadlock. This patch safely removes the possible deadlock scenario by removing extra spinlock. Fixes: 6eb54715b54bb ("qla2xxx: Added interface to send explicit LOGO.") Cc: # 4.10+ Signed-off-by: Quinn Tran Signed-off-by: Himanshu Madhani Reviewed-by: Hannes Reinecke [ Upstream commit b0dcce746b32ac573343ad39cb3dc485030de95e ] Signed-off-by: Somasundaram Krishnasamy Reviewed-by: Jack Vogel --- drivers/scsi/qla2xxx/qla_iocb.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c index b6e6d0081f92..27bd961ce7a6 100644 --- a/drivers/scsi/qla2xxx/qla_iocb.c +++ b/drivers/scsi/qla2xxx/qla_iocb.c @@ -2369,7 +2369,6 @@ qla2x00_els_dcmd_iocb_timeout(void *data) struct scsi_qla_host *vha = sp->vha; struct qla_hw_data *ha = vha->hw; struct srb_iocb *lio = &sp->u.iocb_cmd; - unsigned long flags = 0; ql_dbg(ql_dbg_io, vha, 0x3069, "%s Timeout, hdl=%x, portid=%02x%02x%02x\n", @@ -2377,7 +2376,6 @@ qla2x00_els_dcmd_iocb_timeout(void *data) fcport->d_id.b.al_pa); /* Abort the exchange */ - spin_lock_irqsave(&ha->hardware_lock, flags); if (ha->isp_ops->abort_command(sp)) { ql_dbg(ql_dbg_io, vha, 0x3070, "mbx abort_command failed.\n"); @@ -2385,7 +2383,6 @@ qla2x00_els_dcmd_iocb_timeout(void *data) ql_dbg(ql_dbg_io, vha, 0x3071, "mbx abort_command success.\n"); } - spin_unlock_irqrestore(&ha->hardware_lock, flags); complete(&lio->u.els_logo.comp); } -- 2.50.1