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| author | Sumit.Saxena@lsi.com <Sumit.Saxena@lsi.com> | 2013-10-18 11:20:37 +0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-10-25 14:27:36 +0400 |
| commit | 999ece0af91cdf15e7e0687567914721b4499860 (patch) | |
| tree | a314c2f5c91ebfefac2a2576739ead7b00f37f7b /drivers/scsi | |
| parent | 1109c94444504bff8b7463879e598fb320bf77c0 (diff) | |
| download | linux-999ece0af91cdf15e7e0687567914721b4499860.tar.xz | |
[SCSI] megaraid_sas: Fix synchronization problem between sysPD IO path and AEN path
There is syncronization problem between sysPD IO path and AEN path. Driver
maintains instance->pd_list[] array, which will get updated(by calling
function megasas_get_pd_list[]), whenever any of below events occurs-
MR_EVT_PD_INSERTED
MR_EVT_PD_REMOVED
MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED
MR_EVT_FOREIGN_CFG_IMPORTED
At same time running sysPD IO will be accessing the same array
instance->pd_list[], which is getting updated in AEN path, because of this IO
may not get correct PD info from instance->pd_list[] array.
Signed-off-by: Adam Radford <adam.radford@lsi.com>
Signed-off-by: Sumit Saxena <sumit.saxena@lsi.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas.h | 1 | ||||
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 10 |
2 files changed, 7 insertions, 4 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 0c73ba4bf451..e9e543c58485 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -1531,6 +1531,7 @@ struct megasas_instance { struct megasas_register_set __iomem *reg_set; u32 *reply_post_host_index_addr[MR_MAX_MSIX_REG_ARRAY]; struct megasas_pd_list pd_list[MEGASAS_MAX_PD]; + struct megasas_pd_list local_pd_list[MEGASAS_MAX_PD]; u8 ld_ids[MEGASAS_MAX_LD_IDS]; s8 init_id; diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index e62ff020c253..2cf9470dd11b 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3194,19 +3194,21 @@ megasas_get_pd_list(struct megasas_instance *instance) (le32_to_cpu(ci->count) < (MEGASAS_MAX_PD_CHANNELS * MEGASAS_MAX_DEV_PER_CHANNEL))) { - memset(instance->pd_list, 0, + memset(instance->local_pd_list, 0, MEGASAS_MAX_PD * sizeof(struct megasas_pd_list)); for (pd_index = 0; pd_index < le32_to_cpu(ci->count); pd_index++) { - instance->pd_list[le16_to_cpu(pd_addr->deviceId)].tid = + instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].tid = le16_to_cpu(pd_addr->deviceId); - instance->pd_list[le16_to_cpu(pd_addr->deviceId)].driveType = + instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveType = pd_addr->scsiDevType; - instance->pd_list[le16_to_cpu(pd_addr->deviceId)].driveState = + instance->local_pd_list[le16_to_cpu(pd_addr->deviceId)].driveState = MR_PD_STATE_SYSTEM; pd_addr++; } + memcpy(instance->pd_list, instance->local_pd_list, + sizeof(instance->pd_list)); } pci_free_consistent(instance->pdev, |