[SCSI] allow sleeping in ->eh_device_reset_handler()
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt
index f4a37ee..62f7f76 100644
--- a/Documentation/scsi/scsi_mid_low_api.txt
+++ b/Documentation/scsi/scsi_mid_low_api.txt
@@ -973,8 +973,7 @@
*
* Returns SUCCESS if command aborted else FAILED
*
- * Locks: struct Scsi_Host::host_lock held (with irqsave) on entry
- * and assumed to be held on return.
+ * Locks: None held
*
* Calling context: kernel thread
*
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index de55248..fcfddcc 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -2615,7 +2615,7 @@
/*
* Called by scsi stack when something has really gone wrong.
*/
-static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
+static int __sbp2scsi_reset(struct scsi_cmnd *SCpnt)
{
struct scsi_id_instance_data *scsi_id =
(struct scsi_id_instance_data *)SCpnt->device->host->hostdata[0];
@@ -2630,6 +2630,18 @@
return(SUCCESS);
}
+static int sbp2scsi_reset(struct scsi_cmnd *SCpnt)
+{
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irqsave(SCpnt->device->host->host_lock, flags);
+ rc = __sbp2scsi_reset(SCpnt);
+ spin_unlock_irqrestore(SCpnt->device->host->host_lock, flags);
+
+ return rc;
+}
+
static const char *sbp2scsi_info (struct Scsi_Host *host)
{
return "SCSI emulation for IEEE-1394 SBP-2 Devices";
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index 6a5851c..82cd9bc 100644
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -1801,7 +1801,6 @@
mptscsih_dev_reset(struct scsi_cmnd * SCpnt)
{
MPT_SCSI_HOST *hd;
- spinlock_t *host_lock = SCpnt->device->host->host_lock;
/* If we can't locate our host adapter structure, return FAILED status.
*/
@@ -1818,7 +1817,6 @@
printk(KERN_WARNING MYNAM ": %s: >> Attempting target reset! (sc=%p)\n",
hd->ioc->name, SCpnt);
- spin_unlock_irq(host_lock);
if (mptscsih_TMHandler(hd, MPI_SCSITASKMGMT_TASKTYPE_TARGET_RESET,
SCpnt->device->channel, SCpnt->device->id,
0, 0, 5 /* 5 second timeout */)
@@ -1830,12 +1828,10 @@
hd->ioc->name, SCpnt);
hd->tmPending = 0;
hd->tmState = TM_STATE_NONE;
- spin_lock_irq(host_lock);
return FAILED;
}
- spin_lock_irq(host_lock);
- return SUCCESS;
+ return SUCCESS;
}
/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 6e44475..be7c91d 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -636,8 +636,6 @@
struct zfcp_unit *unit = (struct zfcp_unit *) scpnt->device->hostdata;
struct Scsi_Host *scsi_host = scpnt->device->host;
- spin_unlock_irq(scsi_host->host_lock);
-
if (!unit) {
ZFCP_LOG_NORMAL("bug: Tried reset for nonexistent unit\n");
retval = SUCCESS;
@@ -680,7 +678,6 @@
retval = SUCCESS;
}
out:
- spin_lock_irq(scsi_host->host_lock);
return retval;
}
diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c
index 88d119f..630b115 100644
--- a/drivers/scsi/aha152x.c
+++ b/drivers/scsi/aha152x.c
@@ -1225,8 +1225,6 @@
}
DO_UNLOCK(flags);
-
- spin_lock_irq(shpnt->host_lock);
return ret;
}
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 7fc6c76..31db0ed 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -1511,17 +1511,17 @@
ahd_name(ahd), cmd->device->channel, cmd->device->id,
cmd->device->lun, cmd);
#endif
- ahd_midlayer_entrypoint_lock(ahd, &s);
+ ahd_lock(ahd, &s);
dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id,
cmd->device->lun, /*alloc*/FALSE);
if (dev == NULL) {
- ahd_midlayer_entrypoint_unlock(ahd, &s);
+ ahd_unlock(ahd, &s);
kfree(recovery_cmd);
return (FAILED);
}
if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) {
- ahd_midlayer_entrypoint_unlock(ahd, &s);
+ ahd_unlock(ahd, &s);
kfree(recovery_cmd);
return (FAILED);
}
@@ -1570,7 +1570,7 @@
spin_lock_irq(&ahd->platform_data->spin_lock);
ahd_schedule_runq(ahd);
ahd_linux_run_complete_queue(ahd);
- ahd_midlayer_entrypoint_unlock(ahd, &s);
+ ahd_unlock(ahd, &s);
printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
return (retval);
}
diff --git a/drivers/scsi/aic7xxx_old.c b/drivers/scsi/aic7xxx_old.c
index ee127e8..1e83096 100644
--- a/drivers/scsi/aic7xxx_old.c
+++ b/drivers/scsi/aic7xxx_old.c
@@ -10358,7 +10358,7 @@
* Returns an enumerated type that indicates the status of the operation.
*-F*************************************************************************/
static int
-aic7xxx_bus_device_reset(Scsi_Cmnd *cmd)
+__aic7xxx_bus_device_reset(Scsi_Cmnd *cmd)
{
struct aic7xxx_host *p;
struct aic7xxx_scb *scb;
@@ -10551,6 +10551,18 @@
return SUCCESS;
}
+static int
+aic7xxx_bus_device_reset(Scsi_Cmnd *cmd)
+{
+ int rc;
+
+ spin_lock_irq(cmd->device->host->host_lock);
+ rc = __aic7xxx_bus_device_reset(cmd);
+ spin_unlock_irq(cmd->device->host->host_lock);
+
+ return rc;
+}
+
/*+F*************************************************************************
* Function:
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index d857842..d89b8eb 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -976,9 +976,7 @@
return FAILED;
}
- spin_unlock_irq(hostdata->host->host_lock);
wait_for_completion(&evt->comp);
- spin_lock_irq(hostdata->host->host_lock);
/* make sure we got a good response */
if (unlikely(srp_rsp.srp.generic.type != SRP_RSP_TYPE)) {
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index f9c01a1..fd8af64 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2916,7 +2916,7 @@
* Return value:
* SUCCESS / FAILED
**/
-static int ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd)
+static int __ipr_eh_dev_reset(struct scsi_cmnd * scsi_cmd)
{
struct ipr_cmnd *ipr_cmd;
struct ipr_ioa_cfg *ioa_cfg;
@@ -2970,6 +2970,17 @@
return (IPR_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS);
}
+static int ipr_eh_dev_reset(struct scsi_cmnd * cmd)
+{
+ int rc;
+
+ spin_lock_irq(cmd->device->host->host_lock);
+ rc = __ipr_eh_dev_reset(cmd);
+ spin_unlock_irq(cmd->device->host->host_lock);
+
+ return rc;
+}
+
/**
* ipr_bus_reset_done - Op done function for bus reset.
* @ipr_cmd: ipr command struct
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index e9b84f9..13da268 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -928,7 +928,7 @@
}
static int
-lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
+__lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
{
struct Scsi_Host *shost = cmnd->device->host;
struct lpfc_hba *phba = (struct lpfc_hba *)shost->hostdata[0];
@@ -1040,6 +1040,16 @@
return ret;
}
+static int
+lpfc_reset_lun_handler(struct scsi_cmnd *cmnd)
+{
+ int rc;
+ spin_lock_irq(cmnd->device->host->host_lock);
+ rc = __lpfc_reset_lun_handler(cmnd);
+ spin_unlock_irq(cmnd->device->host->host_lock);
+ return rc;
+}
+
/*
* Note: midlayer calls this function with the host_lock held
*/
diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 8d707b2..80b0c40 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -1938,7 +1938,7 @@
static int
-megaraid_reset(Scsi_Cmnd *cmd)
+__megaraid_reset(Scsi_Cmnd *cmd)
{
adapter_t *adapter;
megacmd_t mc;
@@ -1972,6 +1972,18 @@
return rval;
}
+static int
+megaraid_reset(Scsi_Cmnd *cmd)
+{
+ adapter = (adapter_t *)cmd->device->host->hostdata;
+ int rc;
+
+ spin_lock_irq(&adapter->lock);
+ rc = __megaraid_reset(cmd);
+ spin_unlock_irq(&adapter->lock);
+
+ return rc;
+}
/**
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index bec4406..057ed45 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -2726,7 +2726,7 @@
* host
**/
static int
-megaraid_reset_handler(struct scsi_cmnd *scp)
+__megaraid_reset_handler(struct scsi_cmnd *scp)
{
adapter_t *adapter;
scb_t *scb;
@@ -2847,6 +2847,18 @@
return rval;
}
+static int
+megaraid_reset_handler(struct scsi_cmnd *cmd)
+{
+ int rc;
+
+ spin_lock_irq(cmd->device->host->host_lock);
+ rc = __megaraid_reset_handler(cmd);
+ spin_unlock_irq(cmd->device->host->host_lock);
+
+ return rc;
+}
+
/*
* START: internal commands library
diff --git a/drivers/scsi/qla1280.c b/drivers/scsi/qla1280.c
index 638be81..907a1e8 100644
--- a/drivers/scsi/qla1280.c
+++ b/drivers/scsi/qla1280.c
@@ -1114,7 +1114,13 @@
static int
qla1280_eh_device_reset(struct scsi_cmnd *cmd)
{
- return qla1280_error_action(cmd, DEVICE_RESET);
+ int rc;
+
+ spin_lock_irq(cmd->device->host->host_lock);
+ rc = qla1280_error_action(cmd, DEVICE_RESET);
+ spin_unlock_irq(cmd->device->host->host_lock);
+
+ return rc;
}
/**************************************************************************
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 1693998..360974e 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -613,12 +613,8 @@
qla_printk(KERN_INFO, ha,
"scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
- spin_unlock_irq(ha->host->host_lock);
-
- if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
- spin_lock_irq(ha->host->host_lock);
+ if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
goto eh_dev_reset_done;
- }
if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
if (qla2x00_device_reset(ha, fcport) == 0)
@@ -669,8 +665,6 @@
"scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
eh_dev_reset_done:
- spin_lock_irq(ha->host->host_lock);
-
return ret;
}
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 3877a78..87d9250 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -857,17 +857,14 @@
**/
static int scsi_try_bus_device_reset(struct scsi_cmnd *scmd)
{
- unsigned long flags;
- int rtn = FAILED;
+ int rtn;
if (!scmd->device->host->hostt->eh_device_reset_handler)
- return rtn;
+ return FAILED;
scmd->owner = SCSI_OWNER_LOWLEVEL;
- spin_lock_irqsave(scmd->device->host->host_lock, flags);
rtn = scmd->device->host->hostt->eh_device_reset_handler(scmd);
- spin_unlock_irqrestore(scmd->device->host->host_lock, flags);
if (rtn == SUCCESS) {
scmd->device->was_reset = 1;
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index e2d055e..5ea6255 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -867,7 +867,13 @@
static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd)
{
- return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
+ int rc;
+
+ spin_lock_irq(cmd->device->host->host_lock);
+ rc = sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
+ spin_unlock_irq(cmd->device->host->host_lock);
+
+ return rc;
}
static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd)
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 7dce9c0..739a914 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -253,8 +253,6 @@
US_DEBUGP("%s called\n", __FUNCTION__);
- scsi_unlock(us_to_host(us));
-
/* lock the device pointers and do the reset */
down(&(us->dev_semaphore));
if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
@@ -264,8 +262,6 @@
result = us->transport_reset(us);
up(&(us->dev_semaphore));
- /* lock the host for the return */
- scsi_lock(us_to_host(us));
return result;
}