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From 3dc14fede0858b4a3ad5cf01e2c0411e9b4fa9b4 Mon Sep 17 00:00:00 2001
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From: Himanshu Madhani <hmadhani@redhat.com>
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Date: Thu, 1 Aug 2019 15:55:04 -0400
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Subject: [PATCH 044/124] [scsi] scsi: qla2xxx: Set the SCSI command result
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before calling the command done
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Message-id: <20190801155618.12650-45-hmadhani@redhat.com>
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Patchwork-id: 267820
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O-Subject: [RHEL 7.8 e-stor PATCH 044/118] scsi: qla2xxx: Set the SCSI command result before calling the command done
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Bugzilla: 1729270
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RH-Acked-by: Jarod Wilson <jarod@redhat.com>
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RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
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From: Giridhar Malavali <gmalavali@marvell.com>
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Bugzilla 1729270
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This patch tries to address race condition between abort handler and
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completion handler. When scsi command result is set by both abort and
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completion handler, scsi_done() is only called after refcount on SRB
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structure goes to zero. The abort handler sets this result prematurely even
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when the refcount is non-zero value. Fix this by setting SCSI cmd->result
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before scsi_done() is called.
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Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
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Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
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Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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(cherry picked from commit 740e29358e350077d18ee08700199e37b206edad)
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Signed-off-by: Himanshu Madhani <hmadhani@redhat.com>
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Signed-off-by: Jan Stancek <jstancek@redhat.com>
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---
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drivers/scsi/qla2xxx/qla_os.c | 3 +--
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1 file changed, 1 insertion(+), 2 deletions(-)
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diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
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index f5933550586d..03a760345a82 100644
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--- a/drivers/scsi/qla2xxx/qla_os.c
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+++ b/drivers/scsi/qla2xxx/qla_os.c
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@@ -765,8 +765,6 @@ qla2x00_sp_compl(void *ptr, int res)
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srb_t *sp = ptr;
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struct scsi_cmnd *cmd = GET_CMD_SP(sp);
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- cmd->result = res;
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-
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if (atomic_read(&sp->ref_count) == 0) {
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ql_dbg(ql_dbg_io, sp->vha, 0x3015,
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"SP reference-count to ZERO -- sp=%p cmd=%p.\n",
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@@ -779,6 +777,7 @@ qla2x00_sp_compl(void *ptr, int res)
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return;
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sp->free(sp);
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+ cmd->result = res;
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cmd->scsi_done(cmd);
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}
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--
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2.13.6
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