From 22753fa514aad02342e647ad13048caa282d9238 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Mon, 13 Jun 2005 13:15:15 +0200 Subject: [SCSI] zfcp: fix: allow more time for adapter initialization From: Maxim Shchetynin Extend the time for adapter initialization: In case of protocol status HOST_CONNECTION_INITIALIZING for the exchange config data command do a first retry in 1 second, then double the sleep time for each following retry until recovery exceeds 2 minutes. The old behaviour of allowing 6 retries with .5 seconds delay between retries was insufficient and qdio queues were shut down too erarly. Signed-off-by: Andreas Herrmann Signed-off-by: James Bottomley --- drivers/s390/scsi/zfcp_def.h | 6 ++++-- drivers/s390/scsi/zfcp_erp.c | 25 +++++++++++++------------ 2 files changed, 17 insertions(+), 14 deletions(-) (limited to 'drivers/s390') diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index ead324019ff2..08369b9dad68 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -149,8 +149,10 @@ typedef u32 scsi_lun_t; #define FSF_QTCB_UNSOLICITED_STATUS 0x6305 #define ZFCP_STATUS_READ_FAILED_THRESHOLD 3 #define ZFCP_STATUS_READS_RECOM FSF_STATUS_READS_RECOM -#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 6 -#define ZFCP_EXCHANGE_CONFIG_DATA_SLEEP 50 + +/* Do 1st retry in 1 second, then double the timeout for each following retry */ +#define ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP 100 +#define ZFCP_EXCHANGE_CONFIG_DATA_RETRIES 7 /* timeout value for "default timer" for fsf requests */ #define ZFCP_FSF_REQUEST_TIMEOUT (60*HZ); diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 53ebc1cdfe2d..60ba1ba112d6 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -2286,12 +2286,12 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) { int retval = ZFCP_ERP_SUCCEEDED; int retries; + int sleep = ZFCP_EXCHANGE_CONFIG_DATA_FIRST_SLEEP; struct zfcp_adapter *adapter = erp_action->adapter; atomic_clear_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status); - retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; - do { + for (retries = ZFCP_EXCHANGE_CONFIG_DATA_RETRIES; retries; retries--) { atomic_clear_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, &adapter->status); ZFCP_LOG_DEBUG("Doing exchange config data\n"); @@ -2329,16 +2329,17 @@ zfcp_erp_adapter_strategy_open_fsf_xconfig(struct zfcp_erp_action *erp_action) zfcp_get_busid_by_adapter(adapter)); break; } - if (atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status)) { - ZFCP_LOG_DEBUG("host connection still initialising... " - "waiting and retrying...\n"); - /* sleep a little bit before retry */ - msleep(jiffies_to_msecs(ZFCP_EXCHANGE_CONFIG_DATA_SLEEP)); - } - } while ((retries--) && - atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, - &adapter->status)); + + if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, + &adapter->status)) + break; + + ZFCP_LOG_DEBUG("host connection still initialising... " + "waiting and retrying...\n"); + /* sleep a little bit before retry */ + msleep(jiffies_to_msecs(sleep)); + sleep *= 2; + } if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, &adapter->status)) { -- cgit v1.2.3-55-g7522