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scsi: megaraid_sas: Set no_write_same only for Virtual Disk

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Disable WRITE_SAME (no_write_same) for Virtual Disks only.  For System PDs
and EPDs (Enhanced PDs), WRITE_SAME need not be disabled by default.

Link: https://lore.kernel.org/r/1579000882-20246-3-git-send-email-anand.lodnoor@broadcom.com
Signed-off-by: Anand Lodnoor <anand.lodnoor@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Anand Lodnoor 2020-01-14 16:51:13 +05:30 committed by Martin K. Petersen
parent 499e7246d6
commit a7faf81d78
2 changed files with 18 additions and 4 deletions
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5
drivers/scsi/megaraid/megaraid_sas_base.c
View File

@ -1887,6 +1887,10 @@ void megasas_set_dynamic_target_properties(struct scsi_device *sdev,
mr_device_priv_data->is_tm_capable =
raid->capability.tmCapable;
if (!raid->flags.isEPD)
sdev->no_write_same = 1;
} else if (instance->use_seqnum_jbod_fp) {
pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
sdev->id;
@ -3416,7 +3420,6 @@ static struct scsi_host_template megasas_template = {
.bios_param = megasas_bios_param,
.change_queue_depth = scsi_change_queue_depth,
.max_segment_size = 0xffffffff,
.no_write_same = 1,
};
/**

17
drivers/scsi/megaraid/megaraid_sas_fusion.h
View File

@ -864,9 +864,20 @@ struct MR_LD_RAID {
u8 regTypeReqOnRead;
__le16 seqNum;
struct {
u32 ldSyncRequired:1;
u32 reserved:31;
struct {
#ifndef MFI_BIG_ENDIAN
u32 ldSyncRequired:1;
u32 regTypeReqOnReadIsValid:1;
u32 isEPD:1;
u32 enableSLDOnAllRWIOs:1;
u32 reserved:28;
#else
u32 reserved:28;
u32 enableSLDOnAllRWIOs:1;
u32 isEPD:1;
u32 regTypeReqOnReadIsValid:1;
u32 ldSyncRequired:1;
#endif
} flags;
u8 LUN[8]; /* 0x24 8 byte LUN field used for SCSI IO's */