@@ -3604,6 +3604,7 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
shost->max_lun = 1;
shost->max_channel = 1;
shost->max_cmd_len = 16;
+ shost->no_write_same = 1;
/* Schedule policy is determined by ->qc_defer()
* callback and it needs to see every deferred qc.
@@ -1628,6 +1628,7 @@ static struct scsi_host_template scsi_driver_template = {
.cmd_per_lun = 1,
.can_queue = 1,
.sdev_attrs = sbp2_scsi_sysfs_attrs,
+ .no_write_same = 1,
};
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
@@ -2025,7 +2025,8 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = twa_host_attrs,
- .emulated = 1
+ .emulated = 1,
+ .no_write_same = 1,
};
/* This function will probe and initialize a card */
@@ -1600,7 +1600,8 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = twl_host_attrs,
- .emulated = 1
+ .emulated = 1,
+ .no_write_same = 1,
};
/* This function will probe and initialize a card */
@@ -2277,7 +2277,8 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = tw_host_attrs,
- .emulated = 1
+ .emulated = 1,
+ .no_write_same = 1,
};
/* This function will probe and initialize a card */
@@ -1081,6 +1081,7 @@ static struct scsi_host_template aac_driver_template = {
#endif
.use_clustering = ENABLE_CLUSTERING,
.emulated = 1,
+ .no_write_same = 1,
};
static void __aac_shutdown(struct aac_dev * aac)
@@ -137,6 +137,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = {
.cmd_per_lun = ARCMSR_MAX_CMD_PERLUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = arcmsr_host_attrs,
+ .no_write_same = 1,
};
static struct pci_device_id arcmsr_device_id_table[] = {
{PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1110)},
@@ -4691,6 +4691,7 @@ static struct scsi_host_template gdth_template = {
.cmd_per_lun = GDTH_MAXC_P_L,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
+ .no_write_same = 1,
};
#ifdef CONFIG_ISA
@@ -388,6 +388,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->unchecked_isa_dma = sht->unchecked_isa_dma;
shost->use_clustering = sht->use_clustering;
shost->ordered_tag = sht->ordered_tag;
+ shost->no_write_same = sht->no_write_same;
if (sht->supported_mode == MODE_UNKNOWN)
/* means we didn't set it ... default to INITIATOR */
@@ -538,6 +538,7 @@ static struct scsi_host_template hpsa_driver_template = {
.sdev_attrs = hpsa_sdev_attrs,
.shost_attrs = hpsa_shost_attrs,
.max_sectors = 8192,
+ .no_write_same = 1,
};
@@ -6016,7 +6016,8 @@ static struct scsi_host_template driver_template = {
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = ipr_ioa_attrs,
.sdev_attrs = ipr_dev_attrs,
- .proc_name = IPR_NAME
+ .proc_name = IPR_NAME,
+ .no_write_same = 1,
};
/**
@@ -374,6 +374,7 @@ static struct scsi_host_template ips_driver_template = {
.sg_tablesize = IPS_MAX_SG,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
+ .no_write_same = 1,
};
@@ -4520,6 +4520,7 @@ static struct scsi_host_template megaraid_template = {
.eh_device_reset_handler = megaraid_reset,
.eh_bus_reset_handler = megaraid_reset,
.eh_host_reset_handler = megaraid_reset,
+ .no_write_same = 1,
};
static int
@@ -367,6 +367,7 @@ static struct scsi_host_template megaraid_template_g = {
.eh_host_reset_handler = megaraid_reset_handler,
.change_queue_depth = megaraid_change_queue_depth,
.use_clustering = ENABLE_CLUSTERING,
+ .no_write_same = 1,
.sdev_attrs = megaraid_sdev_attrs,
.shost_attrs = megaraid_shost_attrs,
};
@@ -2099,6 +2099,7 @@ static struct scsi_host_template megasas_template = {
.bios_param = megasas_bios_param,
.use_clustering = ENABLE_CLUSTERING,
.change_queue_depth = megasas_change_queue_depth,
+ .no_write_same = 1,
};
/**
@@ -4328,6 +4328,7 @@ static struct scsi_host_template pmcraid_host_template = {
.this_id = -1,
.sg_tablesize = PMCRAID_MAX_IOADLS,
.max_sectors = PMCRAID_IOA_MAX_SECTORS,
+ .no_write_same = 1,
.cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = pmcraid_host_attrs,
@@ -2639,6 +2639,12 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer)
{
struct scsi_device *sdev = sdkp->device;
+ if (sdev->host->no_write_same) {
+ sdev->no_write_same = 1;
+
+ return;
+ }
+
if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) {
/* too large values might cause issues with arcmsr */
int vpd_buf_len = 64;
@@ -1402,6 +1402,7 @@ static struct scsi_host_template scsi_driver = {
.use_clustering = DISABLE_CLUSTERING,
/* Make sure we dont get a sg segment crosses a page boundary */
.dma_boundary = PAGE_SIZE-1,
+ .no_write_same = 1,
};
enum {
@@ -473,6 +473,9 @@ struct scsi_host_template {
*/
unsigned ordered_tag:1;
+ /* True if the controller does not support WRITE SAME */
+ unsigned no_write_same:1;
+
/*
* Countdown for host blocking with no commands outstanding.
*/
@@ -672,6 +675,9 @@ struct Scsi_Host {
/* Don't resume host in EH */
unsigned eh_noresume:1;
+ /* The controller does not support WRITE SAME */
+ unsigned no_write_same:1;
+
/*
* Optional work queue to be utilized by the transport
*/