Bump Linux kernel to 2.6.32.25

13 files changed, 87 insertions, 87 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index aaccc8ecfa8f..d0ef15af23aa 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -994,10 +994,9 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
 		return;
 	cqr = (struct dasd_ccw_req *) intparm;
 	if (cqr->status != DASD_CQR_IN_IO) {
-		DBF_EVENT(DBF_DEBUG,
-			"invalid status in handle_killed_request: "
-			"bus_id %s, status %02x",
-			dev_name(&cdev->dev), cqr->status);
+		DBF_EVENT_DEVID(DBF_DEBUG, cdev,
+				"invalid status in handle_killed_request: "
+				"%02x", cqr->status);
 		return;
 	}
 
@@ -1005,8 +1004,8 @@ static void dasd_handle_killed_request(struct ccw_device *cdev,
 	if (device == NULL ||
 	    device != dasd_device_from_cdev_locked(cdev) ||
 	    strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
-		DBF_DEV_EVENT(DBF_DEBUG, device, "invalid device in request: "
-			      "bus_id %s", dev_name(&cdev->dev));
+		DBF_EVENT_DEVID(DBF_DEBUG, cdev, "%s",
+				"invalid device in request");
 		return;
 	}
 
@@ -1045,12 +1044,13 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 		case -EIO:
 			break;
 		case -ETIMEDOUT:
-			DBF_EVENT(DBF_WARNING, "%s(%s): request timed out\n",
-			       __func__, dev_name(&cdev->dev));
+			DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s: "
+					"request timed out\n", __func__);
 			break;
 		default:
-			DBF_EVENT(DBF_WARNING, "%s(%s): unknown error %ld\n",
-			       __func__, dev_name(&cdev->dev), PTR_ERR(irb));
+			DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s: "
+					"unknown error %ld\n", __func__,
+					PTR_ERR(irb));
 		}
 		dasd_handle_killed_request(cdev, intparm);
 		return;
@@ -1078,8 +1078,8 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
 	device = (struct dasd_device *) cqr->startdev;
 	if (!device ||
 	    strncmp(device->discipline->ebcname, (char *) &cqr->magic, 4)) {
-		DBF_DEV_EVENT(DBF_DEBUG, device, "invalid device in request: "
-			      "bus_id %s", dev_name(&cdev->dev));
+		DBF_EVENT_DEVID(DBF_DEBUG, cdev, "%s",
+				"invalid device in request");
 		return;
 	}
 
@@ -2217,9 +2217,9 @@ int dasd_generic_probe(struct ccw_device *cdev,
 	}
 	ret = dasd_add_sysfs_files(cdev);
 	if (ret) {
-		DBF_EVENT(DBF_WARNING,
-		       "dasd_generic_probe: could not add sysfs entries "
-		       "for %s\n", dev_name(&cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
+				"dasd_generic_probe: could not add "
+				"sysfs entries");
 		return ret;
 	}
 	cdev->handler = &dasd_int_handler;
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 4e49b4a6c880..8174ec921769 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -145,6 +145,15 @@ dasd_diag_erp(struct dasd_device *device)
 
 	mdsk_term_io(device);
 	rc = mdsk_init_io(device, device->block->bp_block, 0, NULL);
+	if (rc == 4) {
+		if (!(device->features & DASD_FEATURE_READONLY)) {
+			dev_warn(&device->cdev->dev,
+				 "The access mode of a DIAG device changed"
+				 " to read-only");
+			device->features |= DASD_FEATURE_READONLY;
+		}
+		rc = 0;
+	}
 	if (rc)
 		dev_warn(&device->cdev->dev, "DIAG ERP failed with "
 			    "rc=%d\n", rc);
@@ -433,16 +442,20 @@ dasd_diag_check_device(struct dasd_device *device)
 	for (sb = 512; sb < bsize; sb = sb << 1)
 		block->s2b_shift++;
 	rc = mdsk_init_io(device, block->bp_block, 0, NULL);
-	if (rc) {
+	if (rc && (rc != 4)) {
 		dev_warn(&device->cdev->dev, "DIAG initialization "
 			"failed with rc=%d\n", rc);
 		rc = -EIO;
 	} else {
+		if (rc == 4)
+			device->features |= DASD_FEATURE_READONLY;
 		dev_info(&device->cdev->dev,
-			 "New DASD with %ld byte/block, total size %ld KB\n",
+			 "New DASD with %ld byte/block, total size %ld KB%s\n",
 			 (unsigned long) block->bp_block,
 			 (unsigned long) (block->blocks <<
-					  block->s2b_shift) >> 1);
+					  block->s2b_shift) >> 1,
+			 (rc == 4) ? ", read-only device" : "");
+		rc = 0;
 	}
 out_label:
 	free_page((long) label);
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 417b97cd3f94..678bb946cd39 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -88,9 +88,9 @@ dasd_eckd_probe (struct ccw_device *cdev)
 	/* set ECKD specific ccw-device options */
 	ret = ccw_device_set_options(cdev, CCWDEV_ALLOW_FORCE);
 	if (ret) {
-		DBF_EVENT(DBF_WARNING,
-		       "dasd_eckd_probe: could not set ccw-device options "
-		       "for %s\n", dev_name(&cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s",
+				"dasd_eckd_probe: could not set "
+				"ccw-device options");
 		return ret;
 	}
 	ret = dasd_generic_probe(cdev, &dasd_eckd_discipline);
@@ -885,16 +885,15 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
 			rc = dasd_eckd_read_conf_lpm(device, &conf_data,
 						     &conf_len, lpm);
 			if (rc && rc != -EOPNOTSUPP) {	/* -EOPNOTSUPP is ok */
-				DBF_EVENT(DBF_WARNING,
+				DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
 					  "Read configuration data returned "
-					  "error %d for device: %s", rc,
-					  dev_name(&device->cdev->dev));
+					  "error %d", rc);
 				return rc;
 			}
 			if (conf_data == NULL) {
-				DBF_EVENT(DBF_WARNING, "No configuration "
-					  "data retrieved for device: %s",
-					  dev_name(&device->cdev->dev));
+				DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+						"No configuration data "
+						"retrieved");
 				continue;	/* no error */
 			}
 			/* save first valid configuration data */
@@ -941,9 +940,8 @@ static int dasd_eckd_read_features(struct dasd_device *device)
 				    sizeof(struct dasd_rssd_features)),
 				   device);
 	if (IS_ERR(cqr)) {
-		DBF_EVENT(DBF_WARNING, "Could not allocate initialization "
-			  "request for device: %s",
-			  dev_name(&device->cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s", "Could not "
+				"allocate initialization request");
 		return PTR_ERR(cqr);
 	}
 	cqr->startdev = device;
@@ -1071,10 +1069,8 @@ static int dasd_eckd_validate_server(struct dasd_device *device)
 	/* may be requested feature is not available on server,
 	 * therefore just report error and go ahead */
 	private = (struct dasd_eckd_private *) device->private;
-	DBF_EVENT(DBF_WARNING, "PSF-SSC on storage subsystem %s.%s.%04x "
-		  "returned rc=%d for device: %s",
-		  private->uid.vendor, private->uid.serial,
-		  private->uid.ssid, rc, dev_name(&device->cdev->dev));
+	DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "PSF-SSC for SSID %04x "
+			"returned rc=%d", private->uid.ssid, rc);
 	/* RE-Read Configuration Data */
 	return dasd_eckd_read_conf(device);
 }
@@ -1123,9 +1119,9 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
 	if (private->uid.type == UA_BASE_DEVICE) {
 		block = dasd_alloc_block();
 		if (IS_ERR(block)) {
-			DBF_EVENT(DBF_WARNING, "could not allocate dasd "
-				  "block structure for device: %s",
-				  dev_name(&device->cdev->dev));
+			DBF_EVENT_DEVID(DBF_WARNING, device->cdev, "%s",
+					"could not allocate dasd "
+					"block structure");
 			rc = PTR_ERR(block);
 			goto out_err1;
 		}
@@ -1153,9 +1149,8 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
 	rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
 					 &private->rdc_data, 64);
 	if (rc) {
-		DBF_EVENT(DBF_WARNING,
-			  "Read device characteristics failed, rc=%d for "
-			  "device: %s", rc, dev_name(&device->cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
+				"Read device characteristic failed, rc=%d", rc);
 		goto out_err3;
 	}
 	/* find the vaild cylinder size */
@@ -2980,7 +2975,7 @@ static void dasd_eckd_dump_sense_ccw(struct dasd_device *device,
 	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 		       " in req: %p CS: 0x%02X DS: 0x%02X CC: 0x%02X RC: %d\n",
 		       req, scsw_cstat(&irb->scsw), scsw_dstat(&irb->scsw),
-		       scsw_cc(&irb->scsw), req->intrc);
+		       scsw_cc(&irb->scsw), req ? req->intrc : 0);
 	len += sprintf(page + len, KERN_ERR PRINTK_HEADER
 		       " device %s: Failing CCW: %p\n",
 		       dev_name(&device->cdev->dev),
@@ -3253,9 +3248,8 @@ int dasd_eckd_restore_device(struct dasd_device *device)
 	rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
 					 &temp_rdc_data, 64);
 	if (rc) {
-		DBF_EVENT(DBF_WARNING,
-			  "Read device characteristics failed, rc=%d for "
-			  "device: %s", rc, dev_name(&device->cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
+				"Read device characteristic failed, rc=%d", rc);
 		goto out_err;
 	}
 	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index f245377e8e27..227b4e91b18e 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -141,9 +141,8 @@ dasd_fba_check_characteristics(struct dasd_device *device)
 	}
 	block = dasd_alloc_block();
 	if (IS_ERR(block)) {
-		DBF_EVENT(DBF_WARNING, "could not allocate dasd block "
-			  "structure for device: %s",
-			  dev_name(&device->cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, cdev, "%s", "could not allocate "
+				"dasd block structure");
 		device->private = NULL;
 		kfree(private);
 		return PTR_ERR(block);
@@ -155,9 +154,8 @@ dasd_fba_check_characteristics(struct dasd_device *device)
 	rc = dasd_generic_read_dev_chars(device, DASD_FBA_MAGIC,
 					 &private->rdc_data, 32);
 	if (rc) {
-		DBF_EVENT(DBF_WARNING, "Read device characteristics returned "
-			  "error %d for device: %s",
-			  rc, dev_name(&device->cdev->dev));
+		DBF_EVENT_DEVID(DBF_WARNING, cdev, "Read device "
+				"characteristics returned error %d", rc);
 		device->block = NULL;
 		dasd_free_block(block);
 		device->private = NULL;
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index 8afd9fa00875..b19f309f3abe 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -108,6 +108,16 @@ do { \
 			    d_data); \
 } while(0)
 
+#define DBF_EVENT_DEVID(d_level, d_cdev, d_str, d_data...)	\
+do { \
+	struct ccw_dev_id __dev_id;			\
+	ccw_device_get_id(d_cdev, &__dev_id);		\
+	debug_sprintf_event(dasd_debug_area,		\
+			    d_level,					\
+			    "0.%x.%04x " d_str "\n",			\
+			    __dev_id.ssid, __dev_id.devno, d_data);	\
+} while (0)
+
 #define DBF_EXC(d_level, d_str, d_data...)\
 do { \
 	debug_sprintf_exception(dasd_debug_area, \
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index f756a1b0c57a..a5354b83d728 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -260,7 +260,7 @@ static int dasd_ioctl_information(struct dasd_block *block,
 	struct ccw_dev_id dev_id;
 
 	base = block->base;
-	if (!base->discipline->fill_info)
+	if (!base->discipline || !base->discipline->fill_info)
 		return -EINVAL;
 
 	dasd_info = kzalloc(sizeof(struct dasd_information2_t), GFP_KERNEL);
@@ -303,10 +303,7 @@ static int dasd_ioctl_information(struct dasd_block *block,
 	dasd_info->features |=
 		((base->features & DASD_FEATURE_READONLY) != 0);
 
-	if (base->discipline)
-		memcpy(dasd_info->type, base->discipline->name, 4);
-	else
-		memcpy(dasd_info->type, "none", 4);
+	memcpy(dasd_info->type, base->discipline->name, 4);
 
 	if (block->request_queue->request_fn) {
 		struct list_head *l;
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 654daa3cdfda..f9d7d384fd12 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -71,7 +71,7 @@ dasd_devices_show(struct seq_file *m, void *v)
 	/* Print device number. */
 	seq_printf(m, "%s", dev_name(&device->cdev->dev));
 	/* Print discipline string. */
-	if (device != NULL && device->discipline != NULL)
+	if (device->discipline != NULL)
 		seq_printf(m, "(%s)", device->discipline->name);
 	else
 		seq_printf(m, "(none)");
@@ -91,10 +91,7 @@ dasd_devices_show(struct seq_file *m, void *v)
 	substr = (device->features & DASD_FEATURE_READONLY) ? "(ro)" : " ";
 	seq_printf(m, "%4s: ", substr);
 	/* Print device status information. */
-	switch ((device != NULL) ? device->state : -1) {
-	case -1:
-		seq_printf(m, "unknown");
-		break;
+	switch (device->state) {
 	case DASD_STATE_NEW:
 		seq_printf(m, "new");
 		break;
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index 138124fcfcad..126f240715a4 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -618,6 +618,7 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
 	old_regs = set_irq_regs(regs);
 	s390_idle_check();
 	irq_enter();
+	__get_cpu_var(s390_idle).nohz_delay = 1;
 	if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
 		/* Serve timer interrupts first. */
 		clock_comparator_work();
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 2490b741e16a..55f997308e42 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1292,7 +1292,7 @@ static int io_subchannel_probe(struct subchannel *sch)
 	sch->private = kzalloc(sizeof(struct io_subchannel_private),
 			       GFP_KERNEL | GFP_DMA);
 	if (!sch->private)
-		goto out_err;
+		goto out_schedule;
 	/*
 	 * First check if a fitting device may be found amongst the
 	 * disconnected devices or in the orphanage.
@@ -1317,7 +1317,7 @@ static int io_subchannel_probe(struct subchannel *sch)
 	}
 	cdev = io_subchannel_create_ccwdev(sch);
 	if (IS_ERR(cdev))
-		goto out_err;
+		goto out_schedule;
 	rc = io_subchannel_recog(cdev, sch);
 	if (rc) {
 		spin_lock_irqsave(sch->lock, flags);
@@ -1325,9 +1325,7 @@ static int io_subchannel_probe(struct subchannel *sch)
 		spin_unlock_irqrestore(sch->lock, flags);
 	}
 	return 0;
-out_err:
-	kfree(sch->private);
-	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);
+
 out_schedule:
 	io_subchannel_schedule_removal(sch);
 	return 0;
@@ -1341,13 +1339,14 @@ io_subchannel_remove (struct subchannel *sch)
 
 	cdev = sch_get_cdev(sch);
 	if (!cdev)
-		return 0;
+		goto out_free;
 	/* Set ccw device to not operational and drop reference. */
 	spin_lock_irqsave(cdev->ccwlock, flags);
 	sch_set_cdev(sch, NULL);
 	cdev->private->state = DEV_STATE_NOT_OPER;
 	spin_unlock_irqrestore(cdev->ccwlock, flags);
 	ccw_device_unregister(cdev);
+out_free:
 	kfree(sch->private);
 	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);
 	return 0;
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index b9613d7df9ef..13b703a9d63f 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -1080,14 +1080,14 @@ void ccw_device_trigger_reprobe(struct ccw_device *cdev)
 		ccw_device_start_id(cdev, 0);
 }
 
-static void
-ccw_device_offline_irq(struct ccw_device *cdev, enum dev_event dev_event)
+static void ccw_device_disabled_irq(struct ccw_device *cdev,
+				    enum dev_event dev_event)
 {
 	struct subchannel *sch;
 
 	sch = to_subchannel(cdev->dev.parent);
 	/*
-	 * An interrupt in state offline means a previous disable was not
+	 * An interrupt in a disabled state means a previous disable was not
 	 * successful - should not happen, but we try to disable again.
 	 */
 	cio_disable_subchannel(sch);
@@ -1150,25 +1150,12 @@ ccw_device_nop(struct ccw_device *cdev, enum dev_event dev_event)
 }
 
 /*
- * Bug operation action. 
- */
-static void
-ccw_device_bug(struct ccw_device *cdev, enum dev_event dev_event)
-{
-	CIO_MSG_EVENT(0, "Internal state [%i][%i] not handled for device "
-		      "0.%x.%04x\n", cdev->private->state, dev_event,
-		      cdev->private->dev_id.ssid,
-		      cdev->private->dev_id.devno);
-	BUG();
-}
-
-/*
  * device statemachine
  */
 fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
 	[DEV_STATE_NOT_OPER] = {
 		[DEV_EVENT_NOTOPER]	= ccw_device_nop,
-		[DEV_EVENT_INTERRUPT]	= ccw_device_bug,
+		[DEV_EVENT_INTERRUPT]	= ccw_device_disabled_irq,
 		[DEV_EVENT_TIMEOUT]	= ccw_device_nop,
 		[DEV_EVENT_VERIFY]	= ccw_device_nop,
 	},
@@ -1186,7 +1173,7 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
 	},
 	[DEV_STATE_OFFLINE] = {
 		[DEV_EVENT_NOTOPER]	= ccw_device_generic_notoper,
-		[DEV_EVENT_INTERRUPT]	= ccw_device_offline_irq,
+		[DEV_EVENT_INTERRUPT]	= ccw_device_disabled_irq,
 		[DEV_EVENT_TIMEOUT]	= ccw_device_nop,
 		[DEV_EVENT_VERIFY]	= ccw_device_offline_verify,
 	},
@@ -1243,7 +1230,7 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS] = {
 	[DEV_STATE_DISCONNECTED] = {
 		[DEV_EVENT_NOTOPER]	= ccw_device_nop,
 		[DEV_EVENT_INTERRUPT]	= ccw_device_start_id,
-		[DEV_EVENT_TIMEOUT]	= ccw_device_bug,
+		[DEV_EVENT_TIMEOUT]	= ccw_device_nop,
 		[DEV_EVENT_VERIFY]	= ccw_device_start_id,
 	},
 	[DEV_STATE_DISCONNECTED_SENSE_ID] = {
diff --git a/drivers/s390/crypto/zcrypt_pcicc.c b/drivers/s390/crypto/zcrypt_pcicc.c
index f4b0c4795434..7f1e3ba4bb64 100644
--- a/drivers/s390/crypto/zcrypt_pcicc.c
+++ b/drivers/s390/crypto/zcrypt_pcicc.c
@@ -373,6 +373,8 @@ static int convert_type86(struct zcrypt_device *zdev,
 			zdev->max_mod_size = PCICC_MAX_MOD_SIZE_OLD;
 			return -EAGAIN;
 		}
+		if (service_rc == 8 && service_rs == 72)
+			return -EINVAL;
 		zdev->online = 0;
 		return -EAGAIN;	/* repeat the request on a different device. */
 	}
diff --git a/drivers/s390/crypto/zcrypt_pcixcc.c b/drivers/s390/crypto/zcrypt_pcixcc.c
index 5677b40e4ac0..1f9e92387208 100644
--- a/drivers/s390/crypto/zcrypt_pcixcc.c
+++ b/drivers/s390/crypto/zcrypt_pcixcc.c
@@ -462,6 +462,8 @@ static int convert_type86_ica(struct zcrypt_device *zdev,
 		}
 		if (service_rc == 12 && service_rs == 769)
 			return -EINVAL;
+		if (service_rc == 8 && service_rs == 72)
+			return -EINVAL;
 		zdev->online = 0;
 		return -EAGAIN;	/* repeat the request on a different device. */
 	}
diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c
index c84eadd3602a..395c04c2b00f 100644
--- a/drivers/s390/net/netiucv.c
+++ b/drivers/s390/net/netiucv.c
@@ -741,13 +741,13 @@ static void conn_action_txdone(fsm_instance *fi, int event, void *arg)
 	if (single_flag) {
 		if ((skb = skb_dequeue(&conn->commit_queue))) {
 			atomic_dec(&skb->users);
-			dev_kfree_skb_any(skb);
 			if (privptr) {
 				privptr->stats.tx_packets++;
 				privptr->stats.tx_bytes +=
 					(skb->len - NETIUCV_HDRLEN
-					 	  - NETIUCV_HDRLEN);
+						  - NETIUCV_HDRLEN);
 			}
+			dev_kfree_skb_any(skb);
 		}
 	}
 	conn->tx_buff->data = conn->tx_buff->head;