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2193b1b16c
isci is needlessly tying libata's hands by returning
SAM_STAT_CHECK_CONDITION to some ata errors. Instead, prefer
SAS_PROTO_RESPONSE to let libata (via sas_ata_task_done()) disposition
the device-to-host fis.
For example isci is triggering an HSM Violation where AHCI is showing a
simple media error for the same bus condition:
isci:
ata7.00: failed command: READ VERIFY SECTOR(S)
ata7.00: cmd 40/00:01:00:00:00/00:00:00:00:00/e0 tag 0
res 01/04:00:00:00:00/00:00:00:00:00/e0 Emask 0x3 (HSM violation)
ahci:
ata6.00: failed command: READ VERIFY SECTOR(S)
ata6.00: cmd 40/00:01:00:00:00/00:00:00:00:00/e0 tag 0
res 51/40:01:00:00:00/00:00:00:00:00/e0 Emask 0x9 (media error)
Note that the isci response matches this from sas_ata_task_done():
/* We saw a SAS error. Send a vague error. */
[..]
dev->sata_dev.fis[3] = 0x04; /* status err */
dev->sata_dev.fis[2] = ATA_ERR;
The end effect is that isci is needlessly triggering hard resets when
they are not necessary.
Reported-by: Xun Ni <xun.ni@intel.com>
Tested-by: Nelson Cheng <nelson.cheng@intel.com>
Acked-by: Lukasz Dorau <lukasz.dorau@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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|---|---|---|
| .. | ||
| host.c | ||
| host.h | ||
| init.c | ||
| isci.h | ||
| Makefile | ||
| phy.c | ||
| phy.h | ||
| port_config.c | ||
| port.c | ||
| port.h | ||
| probe_roms.c | ||
| probe_roms.h | ||
| registers.h | ||
| remote_device.c | ||
| remote_device.h | ||
| remote_node_context.c | ||
| remote_node_context.h | ||
| remote_node_table.c | ||
| remote_node_table.h | ||
| request.c | ||
| request.h | ||
| sas.h | ||
| scu_completion_codes.h | ||
| scu_event_codes.h | ||
| scu_remote_node_context.h | ||
| scu_task_context.h | ||
| task.c | ||
| task.h | ||
| unsolicited_frame_control.c | ||
| unsolicited_frame_control.h | ||