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authorDan Williams <dan.j.williams@intel.com>2011-12-04 01:06:24 -0800
committerJames Bottomley <JBottomley@Parallels.com>2012-02-19 14:24:02 -0600
commit50824d6c5657ce340e3911171865a8d99fdd8eba (patch)
treefcc9a9250cf596f9d12e3b92d9fa67cb8a77f09c /drivers/scsi/libsas/sas_ata.c
parent89d3cf6ac3cdc4f15a82709f8c78ed169a98be5b (diff)
[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 <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/libsas/sas_ata.c')
-rw-r--r--drivers/scsi/libsas/sas_ata.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 03930a04a679..4beca66728b4 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -23,6 +23,7 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
+#include <linux/async.h>
#include <scsi/sas_ata.h>
#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);
}