From: Sumit.Saxena@lsi.com Date: Fri, 18 Oct 2013 07:20:37 +0000 (+0530) Subject: [SCSI] megaraid_sas: Fix synchronization problem between sysPD IO path and AEN path X-Git-Tag: v3.13-rc1~99^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=999ece0af91cdf15e7e0687567914721b4499860;p=profile%2Fivi%2Fkernel-x86-ivi.git [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 Signed-off-by: Sumit Saxena Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index 0c73ba4..e9e543c 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 e62ff02..2cf9470 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,