diff options
| author | Sreekanth Reddy <sreekanth.reddy@avagotech.com> | 2015-01-12 11:39:00 +0530 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2015-01-13 16:27:26 +0100 |
| commit | ad666a0f41d98e4420acdbfd0e5f25e10f768e13 (patch) | |
| tree | 10b478c683995e440e96f50424cb6c32f2621380 | |
| parent | d42432ad6c5cb8e9dea43e3cef711ef740d8a34a (diff) | |
mpt2sas, mpt3sas: fix upper bound for the module parameter max_sgl_entries
Change Set:
1. Extended the upper boundary restriction for the module parameter
max_sgl_entries. Earlier, the max_sgl_entries was capped at the
SCSI_MAX_SG_SEGMENTS kernel definition. With this change, the user
would be able to set the max_sgl_entries to any value which is
greater than SCSI_MAX_SG_SEGMENTS and less than the minimum of
SCSI_MAX_SG_CHAIN_SEGMENTS & hardware limit (Calculated using
IOCFacts's MaxChainDepth).
2. Added a print for the message log whenever the user sets the
max_sgl_entries to a value greater than SCSI_MAX_SG_SEGMENTS to
warn about the kernel definition overriding.
Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/scsi/mpt2sas/mpt2sas_base.c | 10 | ||||
| -rw-r--r-- | drivers/scsi/mpt3sas/mpt3sas_base.c | 10 |
2 files changed, 15 insertions, 5 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index 14ebb54fae33..88c80efa7d7b 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -2492,9 +2492,13 @@ _base_allocate_memory_pools(struct MPT2SAS_ADAPTER *ioc, int sleep_flag) /* command line tunables for max sgl entries */ if (max_sgl_entries != -1) { - ioc->shost->sg_tablesize = (max_sgl_entries < - MPT2SAS_SG_DEPTH) ? max_sgl_entries : - MPT2SAS_SG_DEPTH; + ioc->shost->sg_tablesize = min_t(unsigned short, + max_sgl_entries, SCSI_MAX_SG_CHAIN_SEGMENTS); + if (ioc->shost->sg_tablesize > MPT2SAS_SG_DEPTH) + printk(MPT2SAS_WARN_FMT + "sg_tablesize(%u) is bigger than kernel defined" + " SCSI_MAX_SG_SEGMENTS(%u)\n", ioc->name, + ioc->shost->sg_tablesize, MPT2SAS_SG_DEPTH); } else { ioc->shost->sg_tablesize = MPT2SAS_SG_DEPTH; } diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c index 678e1ff33f1e..a428fdd43df5 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -2666,8 +2666,14 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc, int sleep_flag) if (sg_tablesize < MPT3SAS_MIN_PHYS_SEGMENTS) sg_tablesize = MPT3SAS_MIN_PHYS_SEGMENTS; - else if (sg_tablesize > MPT3SAS_MAX_PHYS_SEGMENTS) - sg_tablesize = MPT3SAS_MAX_PHYS_SEGMENTS; + else if (sg_tablesize > MPT3SAS_MAX_PHYS_SEGMENTS) { + sg_tablesize = min_t(unsigned short, sg_tablesize, + SCSI_MAX_SG_CHAIN_SEGMENTS); + pr_warn(MPT3SAS_FMT + "sg_tablesize(%u) is bigger than kernel" + " defined SCSI_MAX_SG_SEGMENTS(%u)\n", ioc->name, + sg_tablesize, MPT3SAS_MAX_PHYS_SEGMENTS); + } ioc->shost->sg_tablesize = sg_tablesize; ioc->hi_priority_depth = facts->HighPriorityCredit; |