Merge commit 'v2.6.30-rc6' into perfcounters/core

Merge reason: this branch was on an -rc4 base, merge it up to -rc6
              to get the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 144 insertions, 72 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index 2d4f85c9d7a..ba6ab170bdf 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -64,6 +64,9 @@
 static struct fasync_struct *async_queue;
 static DECLARE_WAIT_QUEUE_HEAD(ctl_poll_wait);
 
+static int _ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type,
+    u8 *issue_reset);
+
 /**
  * enum block_state - blocking state
  * @NON_BLOCKING: non blocking
@@ -378,10 +381,22 @@ _ctl_verify_adapter(int ioc_number, struct MPT2SAS_ADAPTER **iocpp)
 void
 mpt2sas_ctl_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
 {
+	int i;
+	u8 issue_reset;
+
 	switch (reset_phase) {
 	case MPT2_IOC_PRE_RESET:
 		dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
 		    "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
+		for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
+			if (!(ioc->diag_buffer_status[i] &
+			    MPT2_DIAG_BUFFER_IS_REGISTERED))
+				continue;
+			if ((ioc->diag_buffer_status[i] &
+			    MPT2_DIAG_BUFFER_IS_RELEASED))
+				continue;
+			_ctl_send_release(ioc, i, &issue_reset);
+		}
 		break;
 	case MPT2_IOC_AFTER_RESET:
 		dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
@@ -395,6 +410,17 @@ mpt2sas_ctl_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
 	case MPT2_IOC_DONE_RESET:
 		dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
 		    "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
+
+		for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {
+			if (!(ioc->diag_buffer_status[i] &
+			    MPT2_DIAG_BUFFER_IS_REGISTERED))
+				continue;
+			if ((ioc->diag_buffer_status[i] &
+			    MPT2_DIAG_BUFFER_IS_RELEASED))
+				continue;
+			ioc->diag_buffer_status[i] |=
+			    MPT2_DIAG_BUFFER_IS_DIAG_RESET;
+		}
 		break;
 	}
 }
@@ -714,8 +740,10 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc,
 
 		if (tm_request->TaskType ==
 		    MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK) {
-			if (_ctl_do_task_abort(ioc, &karg, tm_request))
+			if (_ctl_do_task_abort(ioc, &karg, tm_request)) {
+				mpt2sas_base_free_smid(ioc, smid);
 				goto out;
+			}
 		}
 
 		mutex_lock(&ioc->tm_cmds.mutex);
@@ -915,9 +943,9 @@ _ctl_getiocinfo(void __user *arg)
 	karg.pci_information.u.bits.function = PCI_FUNC(ioc->pdev->devfn);
 	karg.pci_information.segment_id = pci_domain_nr(ioc->pdev->bus);
 	karg.firmware_version = ioc->facts.FWVersion.Word;
-	strncpy(karg.driver_version, MPT2SAS_DRIVER_VERSION,
-	    MPT2_IOCTL_VERSION_LENGTH);
-	karg.driver_version[MPT2_IOCTL_VERSION_LENGTH - 1] = '\0';
+	strcpy(karg.driver_version, MPT2SAS_DRIVER_NAME);
+	strcat(karg.driver_version, "-");
+	strcat(karg.driver_version, MPT2SAS_DRIVER_VERSION);
 	karg.bios_version = le32_to_cpu(ioc->bios_pg3.BiosVersion);
 
 	if (copy_to_user(arg, &karg, sizeof(karg))) {
@@ -1551,81 +1579,38 @@ _ctl_diag_query(void __user *arg)
 }
 
 /**
- * _ctl_diag_release - request to send Diag Release Message to firmware
- * @arg - user space buffer containing ioctl content
- * @state - NON_BLOCKING or BLOCKING
+ * _ctl_send_release - Diag Release Message
+ * @ioc: per adapter object
+ * @buffer_type - specifies either TRACE or SNAPSHOT
+ * @issue_reset - specifies whether host reset is required.
  *
- * This allows ownership of the specified buffer to returned to the driver,
- * allowing an application to read the buffer without fear that firmware is
- * overwritting information in the buffer.
  */
-static long
-_ctl_diag_release(void __user *arg, enum block_state state)
+static int
+_ctl_send_release(struct MPT2SAS_ADAPTER *ioc, u8 buffer_type, u8 *issue_reset)
 {
-	struct mpt2_diag_release karg;
-	struct MPT2SAS_ADAPTER *ioc;
-	void *request_data;
-	int rc;
 	Mpi2DiagReleaseRequest_t *mpi_request;
 	Mpi2DiagReleaseReply_t *mpi_reply;
-	u8 buffer_type;
-	unsigned long timeleft;
 	u16 smid;
 	u16 ioc_status;
-	u8 issue_reset = 0;
-
-	if (copy_from_user(&karg, arg, sizeof(karg))) {
-		printk(KERN_ERR "failure at %s:%d/%s()!\n",
-		    __FILE__, __LINE__, __func__);
-		return -EFAULT;
-	}
-	if (_ctl_verify_adapter(karg.hdr.ioc_number, &ioc) == -1 || !ioc)
-		return -ENODEV;
+	u32 ioc_state;
+	int rc;
+	unsigned long timeleft;
 
 	dctlprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
 	    __func__));
 
-	buffer_type = karg.unique_id & 0x000000ff;
-	if (!_ctl_diag_capability(ioc, buffer_type)) {
-		printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
-		    "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
-		return -EPERM;
-	}
-
-	if ((ioc->diag_buffer_status[buffer_type] &
-	    MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
-		printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
-		    "registered\n", ioc->name, __func__, buffer_type);
-		return -EINVAL;
-	}
-
-	if (karg.unique_id != ioc->unique_id[buffer_type]) {
-		printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
-		    "registered\n", ioc->name, __func__, karg.unique_id);
-		return -EINVAL;
-	}
-
-	if (ioc->diag_buffer_status[buffer_type] &
-	    MPT2_DIAG_BUFFER_IS_RELEASED) {
-		printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
-		    "is already released\n", ioc->name, __func__,
-		    buffer_type);
-		return 0;
-	}
-
-	request_data = ioc->diag_buffer[buffer_type];
+	rc = 0;
+	*issue_reset = 0;
 
-	if (!request_data) {
-		printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
-		    "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
-		return -ENOMEM;
+	ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
+	if (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
+		dctlprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+		    "skipping due to FAULT state\n", ioc->name,
+		    __func__));
+		rc = -EAGAIN;
+		goto out;
 	}
 
-	if (state == NON_BLOCKING && !mutex_trylock(&ioc->ctl_cmds.mutex))
-		return -EAGAIN;
-	else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex))
-		return -ERESTARTSYS;
-
 	if (ioc->ctl_cmds.status != MPT2_CMD_NOT_USED) {
 		printk(MPT2SAS_ERR_FMT "%s: ctl_cmd in use\n",
 		    ioc->name, __func__);
@@ -1641,7 +1626,6 @@ _ctl_diag_release(void __user *arg, enum block_state state)
 		goto out;
 	}
 
-	rc = 0;
 	ioc->ctl_cmds.status = MPT2_CMD_PENDING;
 	memset(ioc->ctl_cmds.reply, 0, ioc->reply_sz);
 	mpi_request = mpt2sas_base_get_msg_frame(ioc, smid);
@@ -1660,8 +1644,9 @@ _ctl_diag_release(void __user *arg, enum block_state state)
 		_debug_dump_mf(mpi_request,
 		    sizeof(Mpi2DiagReleaseRequest_t)/4);
 		if (!(ioc->ctl_cmds.status & MPT2_CMD_RESET))
-			issue_reset = 1;
-		goto issue_host_reset;
+			*issue_reset = 1;
+		rc = -EFAULT;
+		goto out;
 	}
 
 	/* process the completed Reply Message Frame */
@@ -1687,14 +1672,101 @@ _ctl_diag_release(void __user *arg, enum block_state state)
 		rc = -EFAULT;
 	}
 
- issue_host_reset:
+ out:
+	ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
+	return rc;
+}
+
+/**
+ * _ctl_diag_release - request to send Diag Release Message to firmware
+ * @arg - user space buffer containing ioctl content
+ * @state - NON_BLOCKING or BLOCKING
+ *
+ * This allows ownership of the specified buffer to returned to the driver,
+ * allowing an application to read the buffer without fear that firmware is
+ * overwritting information in the buffer.
+ */
+static long
+_ctl_diag_release(void __user *arg, enum block_state state)
+{
+	struct mpt2_diag_release karg;
+	struct MPT2SAS_ADAPTER *ioc;
+	void *request_data;
+	int rc;
+	u8 buffer_type;
+	u8 issue_reset = 0;
+
+	if (copy_from_user(&karg, arg, sizeof(karg))) {
+		printk(KERN_ERR "failure at %s:%d/%s()!\n",
+		    __FILE__, __LINE__, __func__);
+		return -EFAULT;
+	}
+	if (_ctl_verify_adapter(karg.hdr.ioc_number, &ioc) == -1 || !ioc)
+		return -ENODEV;
+
+	dctlprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s\n", ioc->name,
+	    __func__));
+
+	buffer_type = karg.unique_id & 0x000000ff;
+	if (!_ctl_diag_capability(ioc, buffer_type)) {
+		printk(MPT2SAS_ERR_FMT "%s: doesn't have capability for "
+		    "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
+		return -EPERM;
+	}
+
+	if ((ioc->diag_buffer_status[buffer_type] &
+	    MPT2_DIAG_BUFFER_IS_REGISTERED) == 0) {
+		printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) is not "
+		    "registered\n", ioc->name, __func__, buffer_type);
+		return -EINVAL;
+	}
+
+	if (karg.unique_id != ioc->unique_id[buffer_type]) {
+		printk(MPT2SAS_ERR_FMT "%s: unique_id(0x%08x) is not "
+		    "registered\n", ioc->name, __func__, karg.unique_id);
+		return -EINVAL;
+	}
+
+	if (ioc->diag_buffer_status[buffer_type] &
+	    MPT2_DIAG_BUFFER_IS_RELEASED) {
+		printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
+		    "is already released\n", ioc->name, __func__,
+		    buffer_type);
+		return 0;
+	}
+
+	request_data = ioc->diag_buffer[buffer_type];
+
+	if (!request_data) {
+		printk(MPT2SAS_ERR_FMT "%s: doesn't have memory allocated for "
+		    "buffer_type(0x%02x)\n", ioc->name, __func__, buffer_type);
+		return -ENOMEM;
+	}
+
+	/* buffers were released by due to host reset */
+	if ((ioc->diag_buffer_status[buffer_type] &
+	    MPT2_DIAG_BUFFER_IS_DIAG_RESET)) {
+		ioc->diag_buffer_status[buffer_type] |=
+		    MPT2_DIAG_BUFFER_IS_RELEASED;
+		ioc->diag_buffer_status[buffer_type] &=
+		    ~MPT2_DIAG_BUFFER_IS_DIAG_RESET;
+		printk(MPT2SAS_ERR_FMT "%s: buffer_type(0x%02x) "
+		    "was released due to host reset\n", ioc->name, __func__,
+		    buffer_type);
+		return 0;
+	}
+
+	if (state == NON_BLOCKING && !mutex_trylock(&ioc->ctl_cmds.mutex))
+		return -EAGAIN;
+	else if (mutex_lock_interruptible(&ioc->ctl_cmds.mutex))
+		return -ERESTARTSYS;
+
+	rc = _ctl_send_release(ioc, buffer_type, &issue_reset);
+
 	if (issue_reset)
 		mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
 		    FORCE_BIG_HAMMER);
 
- out:
-
-	ioc->ctl_cmds.status = MPT2_CMD_NOT_USED;
 	mutex_unlock(&ioc->ctl_cmds.mutex);
 	return rc;
 }