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authorSumit.Saxena@lsi.com <Sumit.Saxena@lsi.com>2013-10-18 11:20:37 +0400
committerJames Bottomley <JBottomley@Parallels.com>2013-10-25 14:27:36 +0400
commit999ece0af91cdf15e7e0687567914721b4499860 (patch)
treea314c2f5c91ebfefac2a2576739ead7b00f37f7b /drivers/scsi/megaraid
parent1109c94444504bff8b7463879e598fb320bf77c0 (diff)
downloadlinux-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/megaraid')
-rw-r--r--drivers/scsi/megaraid/megaraid_sas.h1
-rw-r--r--drivers/scsi/megaraid/megaraid_sas_base.c10
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,