[SCSI] Disable WRITE SAME for RAID and virtual host adapter drivers

Some host adapters do not pass commands through to the target disk
directly. Instead they provide an emulated target which may or may not
accurately report its capabilities. In some cases the physical device
characteristics are reported even when the host adapter is processing
commands on the device's behalf. This can lead to adapter firmware hangs
or excessive I/O errors.

This patch disables WRITE SAME for devices connected to host adapters
that provide an emulated target. Driver writers can disable WRITE SAME
by setting the no_write_same flag in the host adapter template.

[jejb: fix up rejections due to eh_deadline patch]
Signed-off-by: Martin K. Petersen <[email protected]>
Cc: [email protected]
Signed-off-by: James Bottomley <[email protected]>

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index db6dfcfa3e2ee932190069290814f2a71bc8f3f6..ab58556d347c19120c9724389583c2ae67a2d81e 100644 (file)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3625,6 +3625,7 @@ 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.

diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c
index 281029daf98c7ea291886d46ecf05378bfa98718..b0bb056458a363b0ee457beea13a8b926a63d483 100644 (file)
--- a/drivers/firewire/sbp2.c
+++ b/drivers/firewire/sbp2.c
@@ -1623,6 +1623,7 @@ 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 <[email protected]>");

diff --git a/drivers/scsi/3w-9xxx.c b/drivers/scsi/3w-9xxx.c
index 5e1e12c0cf4220796112d2d6dd9d9e102fdf537d..0a7325361d2958dceeae99da5959e518f8490985 100644 (file)
--- a/drivers/scsi/3w-9xxx.c
+++ b/drivers/scsi/3w-9xxx.c
@@ -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 */

diff --git a/drivers/scsi/3w-sas.c b/drivers/scsi/3w-sas.c
index c845bdbeb6c06f971923300e7f8e11182d18d84c..4de346017e9ff91b43aed80d48231ac60f23a4e3 100644 (file)
--- a/drivers/scsi/3w-sas.c
+++ b/drivers/scsi/3w-sas.c
@@ -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 */

diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index b9276d10b25c2e277c05e1b6e48e196a11b38fa4..752624e6bc0022807c6265539cad6d8b42d1611f 100644 (file)
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -2279,7 +2279,8 @@ 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 */

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index f0d432c139d0cecedf51295562c858d22a9f44f0..4921ed19a027f819b731271c4804be74d2426e5a 100644 (file)
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -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)

diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 97fd450aff09315194233e7a8ea1f06b566248ef..4f6a30b8e5f99bb3cba345bfec806cdc4972b9f3 100644 (file)
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -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)},

diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index ee4fa40a50b131597a3e1b6960bffc17191f2d03..ce5ef0190bad3f99f7459a859ce0ca0a1e947246 100644 (file)
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -4684,6 +4684,7 @@ 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

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index f334859024c0652e3ce9bd197c66ca39b877af65..f2c5005f312af9aabeb25f8831ee17b5f28f6a42 100644 (file)
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -395,6 +395,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
        shost->use_clustering = sht->use_clustering;
        shost->ordered_tag = sht->ordered_tag;
        shost->eh_deadline = shost_eh_deadline * HZ;
+       shost->no_write_same = sht->no_write_same;
 
        if (sht->supported_mode == MODE_UNKNOWN)
                /* means we didn't set it ... default to INITIATOR */

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 22f6432eb4755a20af732e8c4d4060e9fbb9e909..2336beff7a4869f5bd10bb3045523f3ee32c1953 100644 (file)
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -561,6 +561,7 @@ 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,
 };
 
 

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 36ac1c34ce97eb53374f55451b8b42f4752b88f2..573f4128b6b68018f43a3263d166232ef39601fc 100644 (file)
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -6305,7 +6305,8 @@ 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,
 };
 
 /**

diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 8d5ea8a1e5a6f33ab8235b300417d7ba352f84f7..52a216f21ae579644b97c093e89e12306a265595 100644 (file)
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c
@@ -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,
 };
 
 

diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 90c95a3385d18bb52f93093da10c8d400514f712..816db12ef5d555159226c5eb618b110ebb790776 100644 (file)
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -4244,6 +4244,7 @@ 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

diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index d1a4b82836ea6936f55504e33bcaabb5db9adbee..e2237a97cb9d314b485869cc37da7e3de8062531 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -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,
 };

diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 0a743a5d16477a5e168f02a77a99e90f201caac3..c99812bf2a732f7180c291f3dcc23b5eda81a74c 100644 (file)
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -2148,6 +2148,7 @@ 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,
 };
 
 /**

diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
index bd6f743d87a78af19c698d38d70291723fd28dfb..f413ef796b4305d337f8bd77be12c5ffe6bf0d82 100644 (file)
--- a/drivers/scsi/pmcraid.c
+++ b/drivers/scsi/pmcraid.c
@@ -4315,6 +4315,7 @@ 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,

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e6c4bff04339cb1975637a92bb3842601e1e158f..69725f7c32c1bc5b6c6dbfb93756aa4770b5d17e 100644 (file)
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2659,6 +2659,12 @@ 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;

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 1a28f5632797ed2da2f27c0752013e3c7e4dde5d..17d7404272400dd1a76989a3965e0c4b85343036 100644 (file)
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1697,6 +1697,7 @@ 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 {

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 546084964d554fc8e463e9244558fce4e4eb8563..fe3b58e836c881b7598d37c46d56cbd6d1b81b6e 100644 (file)
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -475,6 +475,9 @@ 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.
         */
@@ -677,6 +680,9 @@ 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
         */