From 50824d6c5657ce340e3911171865a8d99fdd8eba Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Sun, 4 Dec 2011 01:06:24 -0800 Subject: [PATCH] [SCSI] libsas: async ata-eh Once sas_ata_hard_reset() starts honoring the 'deadline' parameter a pathological configuration could take 25 seconds per ata device (serialized) to recover. Run per-port recoveries in parallel. Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index 03930a0..4beca66 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -23,6 +23,7 @@ #include #include +#include #include #include "sas_internal.h" @@ -605,10 +606,21 @@ int sas_discover_sata(struct domain_device *dev) return 0; } +static void async_sas_ata_eh(void *data, async_cookie_t cookie) +{ + struct domain_device *dev = data; + struct ata_port *ap = dev->sata_dev.ap; + struct sas_ha_struct *ha = dev->port->ha; + + ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); + ata_scsi_port_error_handler(ha->core.shost, ap); +} + void sas_ata_strategy_handler(struct Scsi_Host *shost) { struct scsi_device *sdev; struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); + LIST_HEAD(async); /* it's ok to defer revalidation events during ata eh, these * disks are in one of three states: @@ -622,14 +634,13 @@ void sas_ata_strategy_handler(struct Scsi_Host *shost) shost_for_each_device(sdev, shost) { struct domain_device *ddev = sdev_to_domain_dev(sdev); - struct ata_port *ap = ddev->sata_dev.ap; if (!dev_is_sata(ddev)) continue; - ata_port_printk(ap, KERN_DEBUG, "sas eh calling libata port error handler"); - ata_scsi_port_error_handler(shost, ap); + async_schedule_domain(async_sas_ata_eh, ddev, &async); } + async_synchronize_full_domain(&async); sas_enable_revalidation(sas_ha); } -- 2.7.4