[PATCH 08/51] zfcp: open-code fc_block_scsi_eh() for host reset
From: Hannes Reinecke <hare@suse.de>
Date: 2021-08-17 09:16:51
Subsystem:
s390 architecture, s390 zfcp driver, the rest · Maintainers:
Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Nihar Panda, Linus Torvalds
When issuing a host reset we should be waiting for all ports to become unblocked; just waiting for one might be resulting in host reset to return too early. Signed-off-by: Hannes Reinecke <hare@suse.com> Cc: Steffen Maier <redacted> Cc: Benjamin Block <redacted> --- drivers/s390/scsi/zfcp_scsi.c | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-)
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 9da9b2b2a580..9393f1587e8a 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c@@ -373,9 +373,11 @@ static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { - struct zfcp_scsi_dev *zfcp_sdev = sdev_to_zfcp(scpnt->device); - struct zfcp_adapter *adapter = zfcp_sdev->port->adapter; - int ret = SUCCESS, fc_ret; + struct Scsi_Host *host = scpnt->device->host; + struct zfcp_adapter *adapter = (struct zfcp_adapter *)host->hostdata[0]; + int ret = SUCCESS; + unsigned long flags; + struct zfcp_port *port; if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) { zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p");
@@ -383,9 +385,24 @@ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) } zfcp_erp_adapter_reopen(adapter, 0, "schrh_1"); zfcp_erp_wait(adapter); - fc_ret = fc_block_scsi_eh(scpnt); - if (fc_ret) - ret = fc_ret; +retry_rport_blocked: + spin_lock_irqsave(host->host_lock, flags); + list_for_each_entry(port, &adapter->port_list, list) { + struct fc_rport *rport = port->rport; + + if (rport->port_state == FC_PORTSTATE_BLOCKED) { + if (rport->flags & FC_RPORT_FAST_FAIL_TIMEDOUT) + ret = FAST_IO_FAIL; + else + ret = NEEDS_RETRY; + break; + } + } + spin_unlock_irqrestore(host->host_lock, flags); + if (ret == NEEDS_RETRY) { + msleep(1000); + goto retry_rport_blocked; + } zfcp_dbf_scsi_eh("schrh_r", adapter, ~0, ret); return ret;
--
2.29.2