From: Arun Easi aeasi@marvell.com
stable inclusion from stable-v5.10.137 commit 2ffe5285ea5d907be5f5617abf498c5d8417e107 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 47ccb113cead905bdc236571bf8ac6fed90321b3 upstream.
A direct attach tape device, when gets swapped with another, was not discovered. Fix this by looking at loop map and reinitialize link if there are devices present.
Link: https://lore.kernel.org/linux-scsi/baef87c3-5dad-3b47-44c1-6914bfc90108@cybe... Link: https://lore.kernel.org/r/20220713052045.10683-8-njavali@marvell.com Cc: stable@vger.kernel.org Reported-by: Tony Battersby tonyb@cybernetics.com Tested-by: Tony Battersby tonyb@cybernetics.com Reviewed-by: Himanshu Madhani himanshu.madhani@oracle.com Signed-off-by: Arun Easi aeasi@marvell.com Signed-off-by: Nilesh Javali njavali@marvell.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/scsi/qla2xxx/qla_gbl.h | 3 ++- drivers/scsi/qla2xxx/qla_init.c | 29 +++++++++++++++++++++++++++++ drivers/scsi/qla2xxx/qla_mbx.c | 5 ++++- 3 files changed, 35 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h index 3bc185027342..7e5ee31581d6 100644 --- a/drivers/scsi/qla2xxx/qla_gbl.h +++ b/drivers/scsi/qla2xxx/qla_gbl.h @@ -405,7 +405,8 @@ extern int qla2x00_get_resource_cnts(scsi_qla_host_t *);
extern int -qla2x00_get_fcal_position_map(scsi_qla_host_t *ha, char *pos_map); +qla2x00_get_fcal_position_map(scsi_qla_host_t *ha, char *pos_map, + u8 *num_entries);
extern int qla2x00_get_link_status(scsi_qla_host_t *, uint16_t, struct link_statistics *, diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 08c72d3aeaa9..d8f00bde44cf 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -5270,6 +5270,22 @@ static int qla2x00_configure_n2n_loop(scsi_qla_host_t *vha) return QLA_FUNCTION_FAILED; }
+static void +qla_reinitialize_link(scsi_qla_host_t *vha) +{ + int rval; + + atomic_set(&vha->loop_state, LOOP_DOWN); + atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME); + rval = qla2x00_full_login_lip(vha); + if (rval == QLA_SUCCESS) { + ql_dbg(ql_dbg_disc, vha, 0xd050, "Link reinitialized\n"); + } else { + ql_dbg(ql_dbg_disc, vha, 0xd051, + "Link reinitialization failed (%d)\n", rval); + } +} + /* * qla2x00_configure_local_loop * Updates Fibre Channel Device Database with local loop devices. @@ -5321,6 +5337,19 @@ qla2x00_configure_local_loop(scsi_qla_host_t *vha) spin_unlock_irqrestore(&vha->work_lock, flags);
if (vha->scan.scan_retry < MAX_SCAN_RETRIES) { + u8 loop_map_entries = 0; + int rc; + + rc = qla2x00_get_fcal_position_map(vha, NULL, + &loop_map_entries); + if (rc == QLA_SUCCESS && loop_map_entries > 1) { + /* + * There are devices that are still not logged + * in. Reinitialize to give them a chance. + */ + qla_reinitialize_link(vha); + return QLA_FUNCTION_FAILED; + } set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags); set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags); } diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c index fe702ac5ce41..c43ec0e5dc43 100644 --- a/drivers/scsi/qla2xxx/qla_mbx.c +++ b/drivers/scsi/qla2xxx/qla_mbx.c @@ -3017,7 +3017,8 @@ qla2x00_get_resource_cnts(scsi_qla_host_t *vha) * Kernel context. */ int -qla2x00_get_fcal_position_map(scsi_qla_host_t *vha, char *pos_map) +qla2x00_get_fcal_position_map(scsi_qla_host_t *vha, char *pos_map, + u8 *num_entries) { int rval; mbx_cmd_t mc; @@ -3057,6 +3058,8 @@ qla2x00_get_fcal_position_map(scsi_qla_host_t *vha, char *pos_map)
if (pos_map) memcpy(pos_map, pmap, FCAL_MAP_SIZE); + if (num_entries) + *num_entries = pmap[0]; } dma_pool_free(ha->s_dma_pool, pmap, pmap_dma);