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-rw-r--r--drivers/scsi/be2iscsi/be_cmds.c2
-rw-r--r--drivers/scsi/be2iscsi/be_main.c2
-rw-r--r--drivers/scsi/bfa/bfad.c22
-rw-r--r--drivers/scsi/ch.c2
-rw-r--r--drivers/scsi/csiostor/csio_init.c2
-rw-r--r--drivers/scsi/hpsa.c6
-rw-r--r--drivers/scsi/ipr.c3
-rw-r--r--drivers/scsi/libsas/sas_ata.c3
-rw-r--r--drivers/scsi/libsas/sas_discover.c6
-rw-r--r--drivers/scsi/mac53c94.c10
-rw-r--r--drivers/scsi/mesh.c14
-rw-r--r--drivers/scsi/osd/osd_initiator.c2
-rw-r--r--drivers/scsi/qla2xxx/qla_init.c4
-rw-r--r--drivers/scsi/qla2xxx/qla_mid.c2
-rw-r--r--drivers/scsi/qla2xxx/qla_nx.c2
-rw-r--r--drivers/scsi/qla2xxx/qla_os.c8
-rw-r--r--drivers/scsi/qla2xxx/tcm_qla2xxx.c2
-rw-r--r--drivers/scsi/scsi_error.c31
-rw-r--r--drivers/scsi/scsi_lib.c4
-rw-r--r--drivers/scsi/sg.c15
-rw-r--r--drivers/scsi/ufs/ufshcd.c27
-rw-r--r--drivers/scsi/xen-scsifront.c219
22 files changed, 274 insertions, 114 deletions
diff --git a/drivers/scsi/be2iscsi/be_cmds.c b/drivers/scsi/be2iscsi/be_cmds.c
index 80d97f3d2ed9..1028760b8a22 100644
--- a/drivers/scsi/be2iscsi/be_cmds.c
+++ b/drivers/scsi/be2iscsi/be_cmds.c
@@ -237,7 +237,7 @@ int beiscsi_mccq_compl(struct beiscsi_hba *phba,
beiscsi_log(phba, KERN_WARNING,
BEISCSI_LOG_INIT | BEISCSI_LOG_EH |
BEISCSI_LOG_CONFIG,
- "BC_%d : Insufficent Buffer Error "
+ "BC_%d : Insufficient Buffer Error "
"Resp_Len : %d Actual_Resp_Len : %d\n",
mbx_resp_hdr->response_length,
mbx_resp_hdr->actual_resp_len);
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index a7cc61837818..923a2b5a2439 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -5734,9 +5734,9 @@ free_port:
hba_free:
if (phba->msix_enabled)
pci_disable_msix(phba->pcidev);
- iscsi_host_remove(phba->shost);
pci_dev_put(phba->pcidev);
iscsi_host_free(phba->shost);
+ pci_set_drvdata(pcidev, NULL);
disable_pci:
pci_disable_device(pcidev);
return ret;
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index e90a3742f09d..cc3b9d3d6d40 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -1079,22 +1079,18 @@ bfad_start_ops(struct bfad_s *bfad) {
int
bfad_worker(void *ptr)
{
- struct bfad_s *bfad;
- unsigned long flags;
-
- bfad = (struct bfad_s *)ptr;
-
- while (!kthread_should_stop()) {
+ struct bfad_s *bfad = ptr;
+ unsigned long flags;
- /* Send event BFAD_E_INIT_SUCCESS */
- bfa_sm_send_event(bfad, BFAD_E_INIT_SUCCESS);
+ if (kthread_should_stop())
+ return 0;
- spin_lock_irqsave(&bfad->bfad_lock, flags);
- bfad->bfad_tsk = NULL;
- spin_unlock_irqrestore(&bfad->bfad_lock, flags);
+ /* Send event BFAD_E_INIT_SUCCESS */
+ bfa_sm_send_event(bfad, BFAD_E_INIT_SUCCESS);
- break;
- }
+ spin_lock_irqsave(&bfad->bfad_lock, flags);
+ bfad->bfad_tsk = NULL;
+ spin_unlock_irqrestore(&bfad->bfad_lock, flags);
return 0;
}
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index 0045742fab7d..dad959fcf6d8 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -339,7 +339,7 @@ ch_readconfig(scsi_changer *ch)
ch->firsts[CHET_DT],
ch->counts[CHET_DT]);
} else {
- VPRINTK(KERN_INFO, "reading element address assigment page failed!\n");
+ VPRINTK(KERN_INFO, "reading element address assignment page failed!\n");
}
/* vendor specific element types */
diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c
index d9631e15f7b5..dbe416ff46c2 100644
--- a/drivers/scsi/csiostor/csio_init.c
+++ b/drivers/scsi/csiostor/csio_init.c
@@ -1172,7 +1172,7 @@ static struct pci_error_handlers csio_err_handler = {
* Macros needed to support the PCI Device ID Table ...
*/
#define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
- static struct pci_device_id csio_pci_tbl[] = {
+ static const struct pci_device_id csio_pci_tbl[] = {
/* Define for FCoE uses PF6 */
#define CH_PCI_DEVICE_ID_FUNCTION 0x6
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index a1cfbd3dda47..8eab107b53fb 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -6632,14 +6632,12 @@ static void fail_all_outstanding_cmds(struct ctlr_info *h)
static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
{
- int i, cpu;
+ int cpu;
- cpu = cpumask_first(cpu_online_mask);
- for (i = 0; i < num_online_cpus(); i++) {
+ for_each_online_cpu(cpu) {
u32 *lockup_detected;
lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
*lockup_detected = value;
- cpu = cpumask_next(cpu, cpu_online_mask);
}
wmb(); /* be sure the per-cpu variables are out to memory */
}
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 3128407b407d..882744852aac 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -6901,7 +6901,8 @@ static struct ata_port_operations ipr_sata_ops = {
};
static struct ata_port_info sata_port_info = {
- .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA,
+ .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA |
+ ATA_FLAG_SAS_HOST,
.pio_mask = ATA_PIO4_ONLY,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 932d9cc98d2f..9c706d8c1441 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -547,7 +547,8 @@ static struct ata_port_operations sas_sata_ops = {
};
static struct ata_port_info sata_port_info = {
- .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ,
+ .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ |
+ ATA_FLAG_SAS_HOST,
.pio_mask = ATA_PIO4,
.mwdma_mask = ATA_MWDMA2,
.udma_mask = ATA_UDMA6,
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index 62b58d38ce2e..60de66252fa2 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -500,6 +500,7 @@ static void sas_revalidate_domain(struct work_struct *work)
struct sas_discovery_event *ev = to_sas_discovery_event(work);
struct asd_sas_port *port = ev->port;
struct sas_ha_struct *ha = port->ha;
+ struct domain_device *ddev = port->port_dev;
/* prevent revalidation from finding sata links in recovery */
mutex_lock(&ha->disco_mutex);
@@ -514,8 +515,9 @@ static void sas_revalidate_domain(struct work_struct *work)
SAS_DPRINTK("REVALIDATING DOMAIN on port %d, pid:%d\n", port->id,
task_pid_nr(current));
- if (port->port_dev)
- res = sas_ex_revalidate_domain(port->port_dev);
+ if (ddev && (ddev->dev_type == SAS_FANOUT_EXPANDER_DEVICE ||
+ ddev->dev_type == SAS_EDGE_EXPANDER_DEVICE))
+ res = sas_ex_revalidate_domain(ddev);
SAS_DPRINTK("done REVALIDATING DOMAIN on port %d, pid:%d, res 0x%x\n",
port->id, task_pid_nr(current), res);
diff --git a/drivers/scsi/mac53c94.c b/drivers/scsi/mac53c94.c
index e5cd8d8d4ce7..0adb2e015597 100644
--- a/drivers/scsi/mac53c94.c
+++ b/drivers/scsi/mac53c94.c
@@ -382,16 +382,16 @@ static void set_dma_cmds(struct fsc_state *state, struct scsi_cmnd *cmd)
if (dma_len > 0xffff)
panic("mac53c94: scatterlist element >= 64k");
total += dma_len;
- st_le16(&dcmds->req_count, dma_len);
- st_le16(&dcmds->command, dma_cmd);
- st_le32(&dcmds->phy_addr, dma_addr);
+ dcmds->req_count = cpu_to_le16(dma_len);
+ dcmds->command = cpu_to_le16(dma_cmd);
+ dcmds->phy_addr = cpu_to_le32(dma_addr);
dcmds->xfer_status = 0;
++dcmds;
}
dma_cmd += OUTPUT_LAST - OUTPUT_MORE;
- st_le16(&dcmds[-1].command, dma_cmd);
- st_le16(&dcmds->command, DBDMA_STOP);
+ dcmds[-1].command = cpu_to_le16(dma_cmd);
+ dcmds->command = cpu_to_le16(DBDMA_STOP);
cmd->SCp.this_residual = total;
}
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index 57a95e2c3442..555367f00228 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1287,9 +1287,9 @@ static void set_dma_cmds(struct mesh_state *ms, struct scsi_cmnd *cmd)
}
if (dma_len > 0xffff)
panic("mesh: scatterlist element >= 64k");
- st_le16(&dcmds->req_count, dma_len - off);
- st_le16(&dcmds->command, dma_cmd);
- st_le32(&dcmds->phy_addr, dma_addr + off);
+ dcmds->req_count = cpu_to_le16(dma_len - off);
+ dcmds->command = cpu_to_le16(dma_cmd);
+ dcmds->phy_addr = cpu_to_le32(dma_addr + off);
dcmds->xfer_status = 0;
++dcmds;
dtot += dma_len - off;
@@ -1303,15 +1303,15 @@ static void set_dma_cmds(struct mesh_state *ms, struct scsi_cmnd *cmd)
static char mesh_extra_buf[64];
dtot = sizeof(mesh_extra_buf);
- st_le16(&dcmds->req_count, dtot);
- st_le32(&dcmds->phy_addr, virt_to_phys(mesh_extra_buf));
+ dcmds->req_count = cpu_to_le16(dtot);
+ dcmds->phy_addr = cpu_to_le32(virt_to_phys(mesh_extra_buf));
dcmds->xfer_status = 0;
++dcmds;
}
dma_cmd += OUTPUT_LAST - OUTPUT_MORE;
- st_le16(&dcmds[-1].command, dma_cmd);
+ dcmds[-1].command = cpu_to_le16(dma_cmd);
memset(dcmds, 0, sizeof(*dcmds));
- st_le16(&dcmds->command, DBDMA_STOP);
+ dcmds->command = cpu_to_le16(DBDMA_STOP);
ms->dma_count = dtot;
}
diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c
index 488c3929f19a..0cccd6033feb 100644
--- a/drivers/scsi/osd/osd_initiator.c
+++ b/drivers/scsi/osd/osd_initiator.c
@@ -186,7 +186,7 @@ static int _osd_get_print_system_info(struct osd_dev *od,
if (unlikely(len > sizeof(odi->systemid))) {
OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
- "device idetification might not work\n", len);
+ "device identification might not work\n", len);
len = sizeof(odi->systemid);
}
odi->systemid_len = len;
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 22ea00eb7750..285cb204f300 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -5415,7 +5415,7 @@ qla2x00_load_risc(scsi_qla_host_t *vha, uint32_t *srisc_addr)
blob = qla2x00_request_firmware(vha);
if (!blob) {
ql_log(ql_log_info, vha, 0x0083,
- "Fimware image unavailable.\n");
+ "Firmware image unavailable.\n");
ql_log(ql_log_info, vha, 0x0084,
"Firmware images can be retrieved from: "QLA_FW_URL ".\n");
return QLA_FUNCTION_FAILED;
@@ -5518,7 +5518,7 @@ qla24xx_load_risc_blob(scsi_qla_host_t *vha, uint32_t *srisc_addr)
blob = qla2x00_request_firmware(vha);
if (!blob) {
ql_log(ql_log_warn, vha, 0x0090,
- "Fimware image unavailable.\n");
+ "Firmware image unavailable.\n");
ql_log(ql_log_warn, vha, 0x0091,
"Firmware images can be retrieved from: "
QLA_FW_URL ".\n");
diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index 8f458efc125a..cc94192511cf 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -794,7 +794,7 @@ qla25xx_create_rsp_que(struct qla_hw_data *ha, uint16_t options,
rsp->msix = &ha->msix_entries[que_id + 1];
else
ql_log(ql_log_warn, base_vha, 0x00e3,
- "MSIX not enalbled.\n");
+ "MSIX not enabled.\n");
ha->rsp_q_map[que_id] = rsp;
rsp->rid = rid;
diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c
index 54cb2ac9339b..7d2b18f2675c 100644
--- a/drivers/scsi/qla2xxx/qla_nx.c
+++ b/drivers/scsi/qla2xxx/qla_nx.c
@@ -1274,7 +1274,7 @@ qla82xx_pinit_from_rom(scsi_qla_host_t *vha)
if (off == ADDR_ERROR) {
ql_log(ql_log_fatal, vha, 0x0116,
- "Unknow addr: 0x%08lx.\n", buf[i].addr);
+ "Unknown addr: 0x%08lx.\n", buf[i].addr);
continue;
}
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index e4851f863d20..7462dd70b150 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -446,11 +446,11 @@ static int qla25xx_setup_mode(struct scsi_qla_host *vha)
}
ha->flags.cpu_affinity_enabled = 1;
ql_dbg(ql_dbg_multiq, vha, 0xc007,
- "CPU affinity mode enalbed, "
+ "CPU affinity mode enabled, "
"no. of response queues:%d no. of request queues:%d.\n",
ha->max_rsp_queues, ha->max_req_queues);
ql_dbg(ql_dbg_init, vha, 0x00e9,
- "CPU affinity mode enalbed, "
+ "CPU affinity mode enabled, "
"no. of response queues:%d no. of request queues:%d.\n",
ha->max_rsp_queues, ha->max_req_queues);
}
@@ -4102,7 +4102,7 @@ qla83xx_schedule_work(scsi_qla_host_t *base_vha, int work_code)
break;
default:
ql_log(ql_log_warn, base_vha, 0xb05f,
- "Unknow work-code=0x%x.\n", work_code);
+ "Unknown work-code=0x%x.\n", work_code);
}
return;
@@ -4702,7 +4702,7 @@ qla83xx_idc_state_handler(scsi_qla_host_t *base_vha)
break;
default:
ql_log(ql_log_warn, base_vha, 0xb071,
- "Unknow Device State: %x.\n", dev_state);
+ "Unknown Device State: %x.\n", dev_state);
qla83xx_idc_unlock(base_vha, 0);
qla8xxx_dev_failed_handler(base_vha);
rval = QLA_FUNCTION_FAILED;
diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
index 99f43b7fc9ab..ab4879e12ea7 100644
--- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c
+++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c
@@ -1596,7 +1596,7 @@ static int tcm_qla2xxx_check_initiator_node_acl(
/*
* Finally register the new FC Nexus with TCM
*/
- __transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
+ transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
return 0;
}
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 4cdaffca17fc..c95a4e943fc6 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -26,6 +26,7 @@
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <linux/jiffies.h>
+#include <asm/unaligned.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -2586,3 +2587,33 @@ void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq)
}
}
EXPORT_SYMBOL(scsi_build_sense_buffer);
+
+/**
+ * scsi_set_sense_information - set the information field in a
+ * formatted sense data buffer
+ * @buf: Where to build sense data
+ * @info: 64-bit information value to be set
+ *
+ **/
+void scsi_set_sense_information(u8 *buf, u64 info)
+{
+ if ((buf[0] & 0x7f) == 0x72) {
+ u8 *ucp, len;
+
+ len = buf[7];
+ ucp = (char *)scsi_sense_desc_find(buf, len + 8, 0);
+ if (!ucp) {
+ buf[7] = len + 0xa;
+ ucp = buf + 8 + len;
+ }
+ ucp[0] = 0;
+ ucp[1] = 0xa;
+ ucp[2] = 0x80; /* Valid bit */
+ ucp[3] = 0;
+ put_unaligned_be64(info, &ucp[4]);
+ } else if ((buf[0] & 0x7f) == 0x70) {
+ buf[0] |= 0x80;
+ put_unaligned_be64(info, &buf[3]);
+ }
+}
+EXPORT_SYMBOL(scsi_set_sense_information);
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 54d7a6cbb98a..b1a263137a23 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1311,9 +1311,11 @@ scsi_prep_state_check(struct scsi_device *sdev, struct request *req)
"rejecting I/O to dead device\n");
ret = BLKPREP_KILL;
break;
- case SDEV_QUIESCE:
case SDEV_BLOCK:
case SDEV_CREATED_BLOCK:
+ ret = BLKPREP_DEFER;
+ break;
+ case SDEV_QUIESCE:
/*
* If the devices is blocked we defer normal commands.
*/
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 2270bd51f9c2..9d7b7db75e4b 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -33,7 +33,6 @@ static int sg_version_num = 30536; /* 2 digits for each component */
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/mm.h>
-#include <linux/aio.h>
#include <linux/errno.h>
#include <linux/mtio.h>
#include <linux/ioctl.h>
@@ -51,6 +50,7 @@ static int sg_version_num = 30536; /* 2 digits for each component */
#include <linux/mutex.h>
#include <linux/atomic.h>
#include <linux/ratelimit.h>
+#include <linux/uio.h>
#include "scsi.h"
#include <scsi/scsi_dbg.h>
@@ -1745,17 +1745,14 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
}
if (iov_count) {
- int size = sizeof(struct iovec) * iov_count;
- struct iovec *iov;
+ struct iovec *iov = NULL;
struct iov_iter i;
- iov = memdup_user(hp->dxferp, size);
- if (IS_ERR(iov))
- return PTR_ERR(iov);
+ res = import_iovec(rw, hp->dxferp, iov_count, 0, &iov, &i);
+ if (res < 0)
+ return res;
- iov_iter_init(&i, rw, iov, iov_count,
- min_t(size_t, hp->dxfer_len,
- iov_length(iov, iov_count)));
+ iov_iter_truncate(&i, hp->dxfer_len);
res = blk_rq_map_user_iov(q, rq, md, &i, GFP_ATOMIC);
kfree(iov);
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index dfd72af28f06..648a44675880 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4260,22 +4260,15 @@ static struct scsi_host_template ufshcd_driver_template = {
static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
int ua)
{
- int ret = 0;
- struct regulator *reg = vreg->reg;
- const char *name = vreg->name;
+ int ret;
- BUG_ON(!vreg);
+ if (!vreg)
+ return 0;
- ret = regulator_set_optimum_mode(reg, ua);
- if (ret >= 0) {
- /*
- * regulator_set_optimum_mode() returns new regulator
- * mode upon success.
- */
- ret = 0;
- } else {
- dev_err(dev, "%s: %s set optimum mode(ua=%d) failed, err=%d\n",
- __func__, name, ua, ret);
+ ret = regulator_set_load(vreg->reg, ua);
+ if (ret < 0) {
+ dev_err(dev, "%s: %s set load (ua=%d) failed, err=%d\n",
+ __func__, vreg->name, ua, ret);
}
return ret;
@@ -4284,18 +4277,12 @@ static int ufshcd_config_vreg_load(struct device *dev, struct ufs_vreg *vreg,
static inline int ufshcd_config_vreg_lpm(struct ufs_hba *hba,
struct ufs_vreg *vreg)
{
- if (!vreg)
- return 0;
-
return ufshcd_config_vreg_load(hba->dev, vreg, UFS_VREG_LPM_LOAD_UA);
}
static inline int ufshcd_config_vreg_hpm(struct ufs_hba *hba,
struct ufs_vreg *vreg)
{
- if (!vreg)
- return 0;
-
return ufshcd_config_vreg_load(hba->dev, vreg, vreg->max_uA);
}
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index 34199d206ba6..fad22caf0eff 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -63,6 +63,7 @@
#define VSCSIFRONT_OP_ADD_LUN 1
#define VSCSIFRONT_OP_DEL_LUN 2
+#define VSCSIFRONT_OP_READD_LUN 3
/* Tuning point. */
#define VSCSIIF_DEFAULT_CMD_PER_LUN 10
@@ -113,8 +114,13 @@ struct vscsifrnt_info {
DECLARE_BITMAP(shadow_free_bitmap, VSCSIIF_MAX_REQS);
struct vscsifrnt_shadow *shadow[VSCSIIF_MAX_REQS];
+ /* Following items are protected by the host lock. */
wait_queue_head_t wq_sync;
+ wait_queue_head_t wq_pause;
unsigned int wait_ring_available:1;
+ unsigned int waiting_pause:1;
+ unsigned int pause:1;
+ unsigned callers;
char dev_state_path[64];
struct task_struct *curr;
@@ -274,31 +280,31 @@ static void scsifront_sync_cmd_done(struct vscsifrnt_info *info,
wake_up(&shadow->wq_reset);
}
-static int scsifront_cmd_done(struct vscsifrnt_info *info)
+static void scsifront_do_response(struct vscsifrnt_info *info,
+ struct vscsiif_response *ring_rsp)
+{
+ if (WARN(ring_rsp->rqid >= VSCSIIF_MAX_REQS ||
+ test_bit(ring_rsp->rqid, info->shadow_free_bitmap),
+ "illegal rqid %u returned by backend!\n", ring_rsp->rqid))
+ return;
+
+ if (info->shadow[ring_rsp->rqid]->act == VSCSIIF_ACT_SCSI_CDB)
+ scsifront_cdb_cmd_done(info, ring_rsp);
+ else
+ scsifront_sync_cmd_done(info, ring_rsp);
+}
+
+static int scsifront_ring_drain(struct vscsifrnt_info *info)
{
struct vscsiif_response *ring_rsp;
RING_IDX i, rp;
int more_to_do = 0;
- unsigned long flags;
-
- spin_lock_irqsave(info->host->host_lock, flags);
rp = info->ring.sring->rsp_prod;
rmb(); /* ordering required respective to dom0 */
for (i = info->ring.rsp_cons; i != rp; i++) {
-
ring_rsp = RING_GET_RESPONSE(&info->ring, i);
-
- if (WARN(ring_rsp->rqid >= VSCSIIF_MAX_REQS ||
- test_bit(ring_rsp->rqid, info->shadow_free_bitmap),
- "illegal rqid %u returned by backend!\n",
- ring_rsp->rqid))
- continue;
-
- if (info->shadow[ring_rsp->rqid]->act == VSCSIIF_ACT_SCSI_CDB)
- scsifront_cdb_cmd_done(info, ring_rsp);
- else
- scsifront_sync_cmd_done(info, ring_rsp);
+ scsifront_do_response(info, ring_rsp);
}
info->ring.rsp_cons = i;
@@ -308,6 +314,18 @@ static int scsifront_cmd_done(struct vscsifrnt_info *info)
else
info->ring.sring->rsp_event = i + 1;
+ return more_to_do;
+}
+
+static int scsifront_cmd_done(struct vscsifrnt_info *info)
+{
+ int more_to_do;
+ unsigned long flags;
+
+ spin_lock_irqsave(info->host->host_lock, flags);
+
+ more_to_do = scsifront_ring_drain(info);
+
info->wait_ring_available = 0;
spin_unlock_irqrestore(info->host->host_lock, flags);
@@ -328,6 +346,24 @@ static irqreturn_t scsifront_irq_fn(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static void scsifront_finish_all(struct vscsifrnt_info *info)
+{
+ unsigned i;
+ struct vscsiif_response resp;
+
+ scsifront_ring_drain(info);
+
+ for (i = 0; i < VSCSIIF_MAX_REQS; i++) {
+ if (test_bit(i, info->shadow_free_bitmap))
+ continue;
+ resp.rqid = i;
+ resp.sense_len = 0;
+ resp.rslt = DID_RESET << 16;
+ resp.residual_len = 0;
+ scsifront_do_response(info, &resp);
+ }
+}
+
static int map_data_for_request(struct vscsifrnt_info *info,
struct scsi_cmnd *sc,
struct vscsiif_request *ring_req,
@@ -475,6 +511,27 @@ static struct vscsiif_request *scsifront_command2ring(
return ring_req;
}
+static int scsifront_enter(struct vscsifrnt_info *info)
+{
+ if (info->pause)
+ return 1;
+ info->callers++;
+ return 0;
+}
+
+static void scsifront_return(struct vscsifrnt_info *info)
+{
+ info->callers--;
+ if (info->callers)
+ return;
+
+ if (!info->waiting_pause)
+ return;
+
+ info->waiting_pause = 0;
+ wake_up(&info->wq_pause);
+}
+
static int scsifront_queuecommand(struct Scsi_Host *shost,
struct scsi_cmnd *sc)
{
@@ -486,6 +543,10 @@ static int scsifront_queuecommand(struct Scsi_Host *shost,
uint16_t rqid;
spin_lock_irqsave(shost->host_lock, flags);
+ if (scsifront_enter(info)) {
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
if (RING_FULL(&info->ring))
goto busy;
@@ -505,6 +566,7 @@ static int scsifront_queuecommand(struct Scsi_Host *shost,
if (err < 0) {
pr_debug("%s: err %d\n", __func__, err);
scsifront_put_rqid(info, rqid);
+ scsifront_return(info);
spin_unlock_irqrestore(shost->host_lock, flags);
if (err == -ENOMEM)
return SCSI_MLQUEUE_HOST_BUSY;
@@ -514,11 +576,13 @@ static int scsifront_queuecommand(struct Scsi_Host *shost,
}
scsifront_do_request(info);
+ scsifront_return(info);
spin_unlock_irqrestore(shost->host_lock, flags);
return 0;
busy:
+ scsifront_return(info);
spin_unlock_irqrestore(shost->host_lock, flags);
pr_debug("%s: busy\n", __func__);
return SCSI_MLQUEUE_HOST_BUSY;
@@ -549,7 +613,7 @@ static int scsifront_action_handler(struct scsi_cmnd *sc, uint8_t act)
if (ring_req)
break;
}
- if (err) {
+ if (err || info->pause) {
spin_unlock_irq(host->host_lock);
kfree(shadow);
return FAILED;
@@ -561,6 +625,11 @@ static int scsifront_action_handler(struct scsi_cmnd *sc, uint8_t act)
spin_lock_irq(host->host_lock);
}
+ if (scsifront_enter(info)) {
+ spin_unlock_irq(host->host_lock);
+ return FAILED;
+ }
+
ring_req->act = act;
ring_req->ref_rqid = s->rqid;
@@ -587,6 +656,7 @@ static int scsifront_action_handler(struct scsi_cmnd *sc, uint8_t act)
err = FAILED;
}
+ scsifront_return(info);
spin_unlock_irq(host->host_lock);
return err;
}
@@ -644,6 +714,7 @@ static int scsifront_alloc_ring(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
struct vscsiif_sring *sring;
+ grant_ref_t gref;
int err = -ENOMEM;
/***** Frontend to Backend ring start *****/
@@ -656,14 +727,14 @@ static int scsifront_alloc_ring(struct vscsifrnt_info *info)
SHARED_RING_INIT(sring);
FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE);
- err = xenbus_grant_ring(dev, virt_to_mfn(sring));
+ err = xenbus_grant_ring(dev, sring, 1, &gref);
if (err < 0) {
free_page((unsigned long)sring);
xenbus_dev_fatal(dev, err,
"fail to grant shared ring (Front to Back)");
return err;
}
- info->ring_ref = err;
+ info->ring_ref = gref;
err = xenbus_alloc_evtchn(dev, &info->evtchn);
if (err) {
@@ -698,6 +769,13 @@ free_gnttab:
return err;
}
+static void scsifront_free_ring(struct vscsifrnt_info *info)
+{
+ unbind_from_irqhandler(info->irq, info);
+ gnttab_end_foreign_access(info->ring_ref, 0,
+ (unsigned long)info->ring.sring);
+}
+
static int scsifront_init_ring(struct vscsifrnt_info *info)
{
struct xenbus_device *dev = info->dev;
@@ -744,9 +822,7 @@ again:
fail:
xenbus_transaction_end(xbt, 1);
free_sring:
- unbind_from_irqhandler(info->irq, info);
- gnttab_end_foreign_access(info->ring_ref, 0,
- (unsigned long)info->ring.sring);
+ scsifront_free_ring(info);
return err;
}
@@ -779,6 +855,7 @@ static int scsifront_probe(struct xenbus_device *dev,
}
init_waitqueue_head(&info->wq_sync);
+ init_waitqueue_head(&info->wq_pause);
spin_lock_init(&info->shadow_lock);
snprintf(name, TASK_COMM_LEN, "vscsiif.%d", host->host_no);
@@ -802,13 +879,60 @@ static int scsifront_probe(struct xenbus_device *dev,
return 0;
free_sring:
- unbind_from_irqhandler(info->irq, info);
- gnttab_end_foreign_access(info->ring_ref, 0,
- (unsigned long)info->ring.sring);
+ scsifront_free_ring(info);
scsi_host_put(host);
return err;
}
+static int scsifront_resume(struct xenbus_device *dev)
+{
+ struct vscsifrnt_info *info = dev_get_drvdata(&dev->dev);
+ struct Scsi_Host *host = info->host;
+ int err;
+
+ spin_lock_irq(host->host_lock);
+
+ /* Finish all still pending commands. */
+ scsifront_finish_all(info);
+
+ spin_unlock_irq(host->host_lock);
+
+ /* Reconnect to dom0. */
+ scsifront_free_ring(info);
+ err = scsifront_init_ring(info);
+ if (err) {
+ dev_err(&dev->dev, "fail to resume %d\n", err);
+ scsi_host_put(host);
+ return err;
+ }
+
+ xenbus_switch_state(dev, XenbusStateInitialised);
+
+ return 0;
+}
+
+static int scsifront_suspend(struct xenbus_device *dev)
+{
+ struct vscsifrnt_info *info = dev_get_drvdata(&dev->dev);
+ struct Scsi_Host *host = info->host;
+ int err = 0;
+
+ /* No new commands for the backend. */
+ spin_lock_irq(host->host_lock);
+ info->pause = 1;
+ while (info->callers && !err) {
+ info->waiting_pause = 1;
+ info->wait_ring_available = 0;
+ spin_unlock_irq(host->host_lock);
+ wake_up(&info->wq_sync);
+ err = wait_event_interruptible(info->wq_pause,
+ !info->waiting_pause);
+ spin_lock_irq(host->host_lock);
+ }
+ spin_unlock_irq(host->host_lock);
+ return err;
+}
+
static int scsifront_remove(struct xenbus_device *dev)
{
struct vscsifrnt_info *info = dev_get_drvdata(&dev->dev);
@@ -823,10 +947,7 @@ static int scsifront_remove(struct xenbus_device *dev)
}
mutex_unlock(&scsifront_mutex);
- gnttab_end_foreign_access(info->ring_ref, 0,
- (unsigned long)info->ring.sring);
- unbind_from_irqhandler(info->irq, info);
-
+ scsifront_free_ring(info);
scsi_host_put(info->host);
return 0;
@@ -919,6 +1040,12 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
scsi_device_put(sdev);
}
break;
+ case VSCSIFRONT_OP_READD_LUN:
+ if (device_state == XenbusStateConnected)
+ xenbus_printf(XBT_NIL, dev->nodename,
+ info->dev_state_path,
+ "%d", XenbusStateConnected);
+ break;
default:
break;
}
@@ -932,21 +1059,29 @@ static void scsifront_do_lun_hotplug(struct vscsifrnt_info *info, int op)
static void scsifront_read_backend_params(struct xenbus_device *dev,
struct vscsifrnt_info *info)
{
- unsigned int sg_grant;
+ unsigned int sg_grant, nr_segs;
int ret;
struct Scsi_Host *host = info->host;
ret = xenbus_scanf(XBT_NIL, dev->otherend, "feature-sg-grant", "%u",
&sg_grant);
- if (ret == 1 && sg_grant) {
- sg_grant = min_t(unsigned int, sg_grant, SG_ALL);
- sg_grant = max_t(unsigned int, sg_grant, VSCSIIF_SG_TABLESIZE);
- host->sg_tablesize = min_t(unsigned int, sg_grant,
+ if (ret != 1)
+ sg_grant = 0;
+ nr_segs = min_t(unsigned int, sg_grant, SG_ALL);
+ nr_segs = max_t(unsigned int, nr_segs, VSCSIIF_SG_TABLESIZE);
+ nr_segs = min_t(unsigned int, nr_segs,
VSCSIIF_SG_TABLESIZE * PAGE_SIZE /
sizeof(struct scsiif_request_segment));
- host->max_sectors = (host->sg_tablesize - 1) * PAGE_SIZE / 512;
- }
- dev_info(&dev->dev, "using up to %d SG entries\n", host->sg_tablesize);
+
+ if (!info->pause && sg_grant)
+ dev_info(&dev->dev, "using up to %d SG entries\n", nr_segs);
+ else if (info->pause && nr_segs < host->sg_tablesize)
+ dev_warn(&dev->dev,
+ "SG entries decreased from %d to %u - device may not work properly anymore\n",
+ host->sg_tablesize, nr_segs);
+
+ host->sg_tablesize = nr_segs;
+ host->max_sectors = (nr_segs - 1) * PAGE_SIZE / 512;
}
static void scsifront_backend_changed(struct xenbus_device *dev,
@@ -965,6 +1100,14 @@ static void scsifront_backend_changed(struct xenbus_device *dev,
case XenbusStateConnected:
scsifront_read_backend_params(dev, info);
+
+ if (info->pause) {
+ scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_READD_LUN);
+ xenbus_switch_state(dev, XenbusStateConnected);
+ info->pause = 0;
+ return;
+ }
+
if (xenbus_read_driver_state(dev->nodename) ==
XenbusStateInitialised)
scsifront_do_lun_hotplug(info, VSCSIFRONT_OP_ADD_LUN);
@@ -1002,6 +1145,8 @@ static struct xenbus_driver scsifront_driver = {
.ids = scsifront_ids,
.probe = scsifront_probe,
.remove = scsifront_remove,
+ .resume = scsifront_resume,
+ .suspend = scsifront_suspend,
.otherend_changed = scsifront_backend_changed,
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 11:43:20 +0000