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| author | Mark Salyzyn <mark_salyzyn@us.xyratex.com> | 2011-09-22 08:50:01 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2011-10-02 13:03:22 -0500 |
| commit | b90b378ad5767c0743113c675b09ac00fa534c33 (patch) | |
| tree | 12d38dfd09898009472831f5cdd1b0dcf8c9da2e | |
| parent | 860eca2b2bf90c513c1d6d9f889b3e0801e7ac08 (diff) | |
| download | linux-b90b378ad5767c0743113c675b09ac00fa534c33.tar.bz2 | |
[SCSI] pm8001: fix DEV_IS_GONE infinite retry
On the pm8001, when a device is in the process of going away (device
power off or hot plug), depending on the timing, the driver would return
SAS_PHY_DOWN as the return value to the queuecommand DEV_IS_GONE logic.
The net result is an near infinite retry (especially if SAS debugging is
enabled), the logs will fill with:
kernel: mpi_ssp_completion 2119:e21:SSP IO status 0x13 tag 0xcc1c0000
dlen=90 param=0xe
kernel: wwn=5000c50034069e86 cdb=12 00 00 00 5a 00 00 00 00 00 00 00 00
00 00 00
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
kernel: sas: lldd_execute_task returned: 138
. . .
This patch changes to leverage the port_attached logic to complete the
command with a status of PHY_DOWN so that the disposition can be handled
immediately and correctly.
Signed-off-by: Mark Salyzyn <mark_salyzyn@us.xyratex.com>
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
| -rw-r--r-- | drivers/scsi/pm8001/pm8001_sas.c | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index 9068f123eccf..dfda00d43326 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -356,21 +356,8 @@ static int pm8001_task_exec(struct sas_task *task, const int num, do { dev = t->dev; pm8001_dev = dev->lldd_dev; - if (DEV_IS_GONE(pm8001_dev)) { - if (pm8001_dev) { - PM8001_IO_DBG(pm8001_ha, - pm8001_printk("device %d not ready.\n", - pm8001_dev->device_id)); - } else { - PM8001_IO_DBG(pm8001_ha, - pm8001_printk("device %016llx not " - "ready.\n", SAS_ADDR(dev->sas_addr))); - } - rc = SAS_PHY_DOWN; - goto out_done; - } port = &pm8001_ha->port[sas_find_local_port_id(dev)]; - if (!port->port_attached) { + if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) { if (sas_protocol_ata(t->task_proto)) { struct task_status_struct *ts = &t->task_status; ts->resp = SAS_TASK_UNDELIVERED; |