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Don't retry SAS commands in response to protocol errors

Browse Source 
sys/dev/mpr/mpr_sas_lsi.c
sys/dev/mps/mps_sas_lsi.c
	When mp[rs]sas_get_sata_identify returns
	MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR, don't bother retrying. Protocol
	errors aren't likely to be fixed by sleeping.

	Without this change, a system that generated may protocol errors due
	to signal integrity issues was taking more than an hour to boot, due
	to all the retries.

Reviewed by:	slm
MFC after:	4 weeks
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D4553
This commit is contained in:
Alan Somers 2015-12-14 19:40:47 +00:00
parent 43aa90e584
commit a92fe02768
2 changed files with 22 additions and 6 deletions
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14
sys/dev/mpr/mpr_sas_lsi.c
View File

@ -885,7 +885,13 @@ mprsas_get_sas_address_for_sata_disk(struct mpr_softc *sc,
ioc_status = le16toh(mpi_reply.IOCStatus)
& MPI2_IOCSTATUS_MASK;
sas_status = mpi_reply.SASStatus;
if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
switch (ioc_status) {
case MPI2_IOCSTATUS_SUCCESS:
break;
case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
/* No sense sleeping. this error won't get better */
break;
default:
if (sc->spinup_wait_time > 0) {
mpr_dprint(sc, MPR_INFO, "Sleeping %d seconds "
"after SATA ID error to wait for spinup\n",
@ -894,8 +900,10 @@ mprsas_get_sas_address_for_sata_disk(struct mpr_softc *sc,
"mprid", sc->spinup_wait_time * hz);
}
}
} while (((rc && (rc != EWOULDBLOCK)) || ioc_status || sas_status) &&
(try_count < 5));
} while (((rc && (rc != EWOULDBLOCK)) ||
(ioc_status &&
(ioc_status != MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR))
|| sas_status) && (try_count < 5));
if (rc == 0 && !ioc_status && !sas_status) {
mpr_dprint(sc, MPR_MAPPING, "%s: got SATA identify "

14
sys/dev/mps/mps_sas_lsi.c
View File

@ -794,7 +794,13 @@ mpssas_get_sas_address_for_sata_disk(struct mps_softc *sc,
ioc_status = le16toh(mpi_reply.IOCStatus)
& MPI2_IOCSTATUS_MASK;
sas_status = mpi_reply.SASStatus;
if (ioc_status != MPI2_IOCSTATUS_SUCCESS) {
switch (ioc_status) {
case MPI2_IOCSTATUS_SUCCESS:
break;
case MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR:
/* No sense sleeping. this error won't get better */
break;
default:
if (sc->spinup_wait_time > 0) {
mps_dprint(sc, MPS_INFO, "Sleeping %d seconds "
"after SATA ID error to wait for spinup\n",
@ -803,8 +809,10 @@ mpssas_get_sas_address_for_sata_disk(struct mps_softc *sc,
"mpsid", sc->spinup_wait_time * hz);
}
}
} while (((rc && (rc != EWOULDBLOCK)) || ioc_status || sas_status) &&
(try_count < 5));
} while (((rc && (rc != EWOULDBLOCK)) ||
(ioc_status &&
(ioc_status != MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR))
|| sas_status) && (try_count < 5));
if (rc == 0 && !ioc_status && !sas_status) {
mps_dprint(sc, MPS_MAPPING, "%s: got SATA identify "