19 files changed, 330 insertions, 41 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 4951aa82e9f5..bbea90baf98f 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -26,6 +26,7 @@
 #include <asm/ebcdic.h>
 #include <asm/idals.h>
 #include <asm/itcw.h>
+#include <asm/diag.h>
 /* This is ugly... */
 #define PRINTK_HEADER "dasd:"
@@ -2212,6 +2213,13 @@ static int dasd_open(struct block_device *bdev, fmode_t mode)
                goto out;
        }
+        if ((mode & FMODE_WRITE) &&
+            (test_bit(DASD_FLAG_DEVICE_RO, &base->flags) ||
+             (base->features & DASD_FEATURE_READONLY))) {
+                rc = -EROFS;
+                goto out;
+        }
        return 0;
 out:
@@ -2289,6 +2297,34 @@ dasd_exit(void)
 * SECTION: common functions for ccw_driver use
 */
+/*
+ * Is the device read-only?
+ * Note that this function does not report the setting of the
+ * readonly device attribute, but how it is configured in z/VM.
+ */
+int dasd_device_is_ro(struct dasd_device *device)
+{
+        struct ccw_dev_id dev_id;
+        struct diag210 diag_data;
+        int rc;
+        if (!MACHINE_IS_VM)
+                return 0;
+        ccw_device_get_id(device->cdev, &dev_id);
+        memset(&diag_data, 0, sizeof(diag_data));
+        diag_data.vrdcdvno = dev_id.devno;
+        diag_data.vrdclen = sizeof(diag_data);
+        rc = diag210(&diag_data);
+        if (rc == 0 || rc == 2) {
+                return diag_data.vrdcvfla & 0x80;
+        } else {
+                DBF_EVENT(DBF_WARNING, "diag210 failed for dev=%04x with rc=%d",
+                          dev_id.devno, rc);
+                return 0;
+        }
+}
+EXPORT_SYMBOL_GPL(dasd_device_is_ro);
 static void dasd_generic_auto_online(void *data, async_cookie_t cookie)
 {
        struct ccw_device *cdev = data;
diff --git a/drivers/s390/block/dasd_3990_erp.c b/drivers/s390/block/dasd_3990_erp.c
index 44796ba4eb9b..51224f76b980 100644
--- a/drivers/s390/block/dasd_3990_erp.c
+++ b/drivers/s390/block/dasd_3990_erp.c
@@ -1045,6 +1045,10 @@ dasd_3990_erp_com_rej(struct dasd_ccw_req * erp, char *sense)
                erp->retries = 5;
+        } else if (sense[1] & SNS1_WRITE_INHIBITED) {
+                dev_err(&device->cdev->dev, "An I/O request was rejected"
+                        " because writing is inhibited\n");
+                erp = dasd_3990_erp_cleanup(erp, DASD_CQR_FAILED);
        } else {
                /* fatal error -  set status to FAILED
                   internal error 09 - Command Reject */
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index d49766f3b940..8e23919c8704 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -742,6 +742,7 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr,
              const char *buf, size_t count)
 {
        struct dasd_devmap *devmap;
+        struct dasd_device *device;
        int val;
        char *endp;
@@ -758,12 +759,14 @@ dasd_ro_store(struct device *dev, struct device_attribute *attr,
                devmap->features |= DASD_FEATURE_READONLY;
        else
                devmap->features &= ~DASD_FEATURE_READONLY;
-        if (devmap->device)
+        device = devmap->device;
-                devmap->device->features = devmap->features;
+        if (device) {
-        if (devmap->device && devmap->device->block
+                device->features = devmap->features;
-            && devmap->device->block->gdp)
+                val = val || test_bit(DASD_FLAG_DEVICE_RO, &device->flags);
-                set_disk_ro(devmap->device->block->gdp, val);
+        }
        spin_unlock(&dasd_devmap_lock);
+        if (device && device->block && device->block->gdp)
+                set_disk_ro(device->block->gdp, val);
        return count;
 }
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 6e14863f5c70..687f323cdc38 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -145,12 +145,10 @@ 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)) {
+                if (!(test_and_set_bit(DASD_FLAG_DEVICE_RO, &device->flags)))
                        pr_warning("%s: The access mode of a DIAG device "
                                   "changed to read-only\n",
                                   dev_name(&device->cdev->dev));
-                        device->features |= DASD_FEATURE_READONLY;
-                }
                rc = 0;
        }
        if (rc)
@@ -449,7 +447,7 @@ dasd_diag_check_device(struct dasd_device *device)
                rc = -EIO;
        } else {
                if (rc == 4)
-                        device->features |= DASD_FEATURE_READONLY;
+                        set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
                pr_info("%s: New DASD with %ld byte/block, total size %ld "
                        "KB%s\n", dev_name(&device->cdev->dev),
                        (unsigned long) block->bp_block,
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 1cca21aafaba..01f4e7a34aa8 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1089,6 +1089,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
        struct dasd_eckd_private *private;
        struct dasd_block *block;
        int is_known, rc;
+        int readonly;
        if (!ccw_device_is_pathgroup(device->cdev)) {
                dev_warn(&device->cdev->dev,
@@ -1182,15 +1183,20 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
        else
                private->real_cyl = private->rdc_data.no_cyl;
+        readonly = dasd_device_is_ro(device);
+        if (readonly)
+                set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
        dev_info(&device->cdev->dev, "New DASD %04X/%02X (CU %04X/%02X) "
-                 "with %d cylinders, %d heads, %d sectors\n",
+                 "with %d cylinders, %d heads, %d sectors%s\n",
                 private->rdc_data.dev_type,
                 private->rdc_data.dev_model,
                 private->rdc_data.cu_type,
                 private->rdc_data.cu_model.model,
                 private->real_cyl,
                 private->rdc_data.trk_per_cyl,
-                 private->rdc_data.sec_per_trk);
+                 private->rdc_data.sec_per_trk,
+                 readonly ? ", read-only device" : "");
        return 0;
 out_err3:
@@ -2839,8 +2845,13 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp)
        char *psf_data, *rssd_result;
        struct dasd_ccw_req *cqr;
        struct ccw1 *ccw;
+        char psf0, psf1;
        int rc;
+        if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO))
+                return -EACCES;
+        psf0 = psf1 = 0;
        /* Copy parms from caller */
        rc = -EFAULT;
        if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
@@ -2869,12 +2880,8 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp)
                           (void __user *)(unsigned long) usrparm.psf_data,
                           usrparm.psf_data_len))
                goto out_free;
+        psf0 = psf_data[0];
-        /* sanity check on syscall header */
+        psf1 = psf_data[1];
-        if (psf_data[0] != 0x17 && psf_data[1] != 0xce) {
-                rc = -EINVAL;
-                goto out_free;
-        }
        /* setup CCWs for PSF + RSSD */
        cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 2 , 0, device);
@@ -2925,7 +2932,9 @@ out_free:
        kfree(rssd_result);
        kfree(psf_data);
 out:
-        DBF_DEV_EVENT(DBF_WARNING, device, "Symmetrix ioctl: rc=%d", rc);
+        DBF_DEV_EVENT(DBF_WARNING, device,
+                      "Symmetrix ioctl (0x%02x 0x%02x): rc=%d",
+                      (int) psf0, (int) psf1, rc);
        return rc;
 }
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index 0f152444ac77..37282b90eecc 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -124,6 +124,7 @@ dasd_fba_check_characteristics(struct dasd_device *device)
        struct dasd_fba_private *private;
        struct ccw_device *cdev = device->cdev;
        int rc;
+        int readonly;
        private = (struct dasd_fba_private *) device->private;
        if (!private) {
@@ -162,16 +163,21 @@ dasd_fba_check_characteristics(struct dasd_device *device)
                return rc;
        }
+        readonly = dasd_device_is_ro(device);
+        if (readonly)
+                set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
        dev_info(&device->cdev->dev,
                 "New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
-                 "and %d B/blk\n",
+                 "and %d B/blk%s\n",
                 cdev->id.dev_type,
                 cdev->id.dev_model,
                 cdev->id.cu_type,
                 cdev->id.cu_model,
                 ((private->rdc_data.blk_bdsa *
                   (private->rdc_data.blk_size >> 9)) >> 11),
-                 private->rdc_data.blk_size);
+                 private->rdc_data.blk_size,
+                 readonly ? ", read-only device" : "");
        return 0;
 }
diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index 94f92a1247f2..30a1ca3d08b7 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -70,7 +70,8 @@ int dasd_gendisk_alloc(struct dasd_block *block)
        }
        len += sprintf(gdp->disk_name + len, "%c", 'a'+(base->devindex%26));
-        if (block->base->features & DASD_FEATURE_READONLY)
+        if (base->features & DASD_FEATURE_READONLY ||
+            test_bit(DASD_FLAG_DEVICE_RO, &base->flags))
                set_disk_ro(gdp, 1);
        gdp->private_data = block;
        gdp->queue = block->request_queue;
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index ed73ce550822..a91d4a97d4f2 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -436,6 +436,10 @@ struct dasd_block {
 #define DASD_FLAG_OFFLINE       3       /* device is in offline processing */
 #define DASD_FLAG_EER_SNSS      4       /* A SNSS is required */
 #define DASD_FLAG_EER_IN_USE    5       /* A SNSS request is running */
+#define DASD_FLAG_DEVICE_RO     6       /* The device itself is read-only. Don't
+                                         * confuse this with the user specified
+                                         * read-only feature.
+                                         */
 void dasd_put_device_wake(struct dasd_device *);
@@ -609,6 +613,9 @@ char *dasd_get_sense(struct irb *);
 void dasd_device_set_stop_bits(struct dasd_device *, int);
 void dasd_device_remove_stop_bits(struct dasd_device *, int);
+int dasd_device_is_ro(struct dasd_device *);
 /* externals in dasd_devmap.c */
 extern int dasd_max_devindex;
 extern int dasd_probeonly;
diff --git a/drivers/s390/block/dasd_ioctl.c b/drivers/s390/block/dasd_ioctl.c
index 7039d9cf0fb4..3479f8158a1b 100644
--- a/drivers/s390/block/dasd_ioctl.c
+++ b/drivers/s390/block/dasd_ioctl.c
@@ -199,7 +199,8 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp)
        if (!argp)
                return -EINVAL;
-        if (block->base->features & DASD_FEATURE_READONLY)
+        if (block->base->features & DASD_FEATURE_READONLY ||
+            test_bit(DASD_FLAG_DEVICE_RO, &block->base->flags))
                return -EROFS;
        if (copy_from_user(&fdata, argp, sizeof(struct format_data_t)))
                return -EFAULT;
@@ -349,7 +350,8 @@ dasd_ioctl_set_ro(struct block_device *bdev, void __user *argp)
                return -EINVAL;
        if (get_user(intval, (int __user *)argp))
                return -EFAULT;
+        if (!intval && test_bit(DASD_FLAG_DEVICE_RO, &block->base->flags))
+                return -EROFS;
        set_disk_ro(bdev->bd_disk, intval);
        return dasd_set_feature(block->base->cdev, DASD_FEATURE_READONLY, intval);
 }
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index c6abb75c4615..6d229f3523a0 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -764,7 +764,7 @@ static void sch_create_and_recog_new_device(struct subchannel *sch)
 static void io_subchannel_register(struct ccw_device *cdev)
 {
        struct subchannel *sch;
-        int ret;
+        int ret, adjust_init_count = 1;
        unsigned long flags;
        sch = to_subchannel(cdev->dev.parent);
@@ -793,6 +793,7 @@ static void io_subchannel_register(struct ccw_device *cdev)
                                              cdev->private->dev_id.ssid,
                                              cdev->private->dev_id.devno);
                }
+                adjust_init_count = 0;
                goto out;
        }
        /*
@@ -818,7 +819,7 @@ out:
        cdev->private->flags.recog_done = 1;
        wake_up(&cdev->private->wait_q);
 out_err:
-        if (atomic_dec_and_test(&ccw_device_init_count))
+        if (adjust_init_count && atomic_dec_and_test(&ccw_device_init_count))
                wake_up(&ccw_device_init_wq);
 }
diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c
index c94eb2a0fa2e..6ce83f56d537 100644
--- a/drivers/s390/cio/qdio_debug.c
+++ b/drivers/s390/cio/qdio_debug.c
@@ -33,7 +33,6 @@ void qdio_allocate_dbf(struct qdio_initialize *init_data,
        DBF_HEX(&init_data->input_handler, sizeof(void *));
        DBF_HEX(&init_data->output_handler, sizeof(void *));
        DBF_HEX(&init_data->int_parm, sizeof(long));
-        DBF_HEX(&init_data->flags, sizeof(long));
        DBF_HEX(&init_data->input_sbal_addr_array, sizeof(void *));
        DBF_HEX(&init_data->output_sbal_addr_array, sizeof(void *));
        DBF_EVENT("irq:%8lx", (unsigned long)irq_ptr);
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 232ef047ba34..4f8f74311778 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -588,10 +588,11 @@ static void qdio_kick_handler(struct qdio_q *q)
        if (q->is_input_q) {
                qperf_inc(q, inbound_handler);
                DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%02x c:%02x", start, count);
-        } else
+        } else {
                qperf_inc(q, outbound_handler);
                DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "koh: s:%02x c:%02x",
                              start, count);
+        }
        q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count,
                   q->irq_ptr->int_parm);
diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig
index cb909a5b5047..977bb4d4ed15 100644
--- a/drivers/s390/net/Kconfig
+++ b/drivers/s390/net/Kconfig
@@ -43,6 +43,16 @@ config SMSGIUCV
          Select this option if you want to be able to receive SMSG messages
          from other VM guest systems.
+config SMSGIUCV_EVENT
+        tristate "Deliver IUCV special messages as uevents (VM only)"
+        depends on SMSGIUCV
+        help
+          Select this option to deliver CP special messages (SMSGs) as
+          uevents.  The driver handles only those special messages that
+          start with "APP".
+          To compile as a module, choose M. The module name is "smsgiucv_app".
 config CLAW
        tristate "CLAW device support"
        depends on CCW && NETDEVICES
diff --git a/drivers/s390/net/Makefile b/drivers/s390/net/Makefile
index 6cab5a62f99e..4dfe8c1092da 100644
--- a/drivers/s390/net/Makefile
+++ b/drivers/s390/net/Makefile
@@ -6,6 +6,7 @@ ctcm-y += ctcm_main.o ctcm_fsms.o ctcm_mpc.o ctcm_sysfs.o ctcm_dbug.o
 obj-$(CONFIG_CTCM) += ctcm.o fsm.o
 obj-$(CONFIG_NETIUCV) += netiucv.o fsm.o
 obj-$(CONFIG_SMSGIUCV) += smsgiucv.o
+obj-$(CONFIG_SMSGIUCV_EVENT) += smsgiucv_app.o
 obj-$(CONFIG_LCS) += lcs.o
 obj-$(CONFIG_CLAW) += claw.o
 qeth-y += qeth_core_sys.o qeth_core_main.o qeth_core_mpc.o
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index fa8a519218ac..7d25bdd443cd 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -3805,9 +3805,6 @@ static int qeth_qdio_establish(struct qeth_card *card)
        init_data.input_handler          = card->discipline.input_handler;
        init_data.output_handler         = card->discipline.output_handler;
        init_data.int_parm               = (unsigned long) card;
-        init_data.flags                  = QDIO_INBOUND_0COPY_SBALS |
-                                           QDIO_OUTBOUND_0COPY_SBALS |
-                                           QDIO_USE_OUTBOUND_PCIS;
        init_data.input_sbal_addr_array  = (void **) in_sbal_ptrs;
        init_data.output_sbal_addr_array = (void **) out_sbal_ptrs;
diff --git a/drivers/s390/net/smsgiucv.c b/drivers/s390/net/smsgiucv.c
index 67f2485d2372..ecef1edee701 100644
--- a/drivers/s390/net/smsgiucv.c
+++ b/drivers/s390/net/smsgiucv.c
@@ -31,9 +31,9 @@
 struct smsg_callback {
        struct list_head list;
-        char *prefix;
+        const char *prefix;
        int len;
-        void (*callback)(char *from, char *str);
+        void (*callback)(const char *from, char *str);
 };
 MODULE_AUTHOR
@@ -100,8 +100,8 @@ static void smsg_message_pending(struct iucv_path *path,
        kfree(buffer);
 }
-int smsg_register_callback(char *prefix,
+int smsg_register_callback(const char *prefix,
-                           void (*callback)(char *from, char *str))
+                           void (*callback)(const char *from, char *str))
 {
        struct smsg_callback *cb;
@@ -117,8 +117,9 @@ int smsg_register_callback(char *prefix,
        return 0;
 }
-void smsg_unregister_callback(char *prefix,
+void smsg_unregister_callback(const char *prefix,
-                              void (*callback)(char *from, char *str))
+                              void (*callback)(const char *from,
+                                               char *str))
 {
        struct smsg_callback *cb, *tmp;
@@ -176,7 +177,7 @@ static const struct dev_pm_ops smsg_pm_ops = {
 static struct device_driver smsg_driver = {
        .owner = THIS_MODULE,
-        .name = "SMSGIUCV",
+        .name = SMSGIUCV_DRV_NAME,
        .bus  = &iucv_bus,
        .pm = &smsg_pm_ops,
 };
diff --git a/drivers/s390/net/smsgiucv.h b/drivers/s390/net/smsgiucv.h
index 67f5d4f8378d..149a1151608d 100644
--- a/drivers/s390/net/smsgiucv.h
+++ b/drivers/s390/net/smsgiucv.h
@@ -5,6 +5,10 @@
 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 */
-int  smsg_register_callback(char *, void (*)(char *, char *));
+#define SMSGIUCV_DRV_NAME     "SMSGIUCV"
-void smsg_unregister_callback(char *, void (*)(char *, char *));
+int  smsg_register_callback(const char *,
+                            void (*)(const char *, char *));
+void smsg_unregister_callback(const char *,
+                              void (*)(const char *, char *));
diff --git a/drivers/s390/net/smsgiucv_app.c b/drivers/s390/net/smsgiucv_app.c
new file mode 100644
index 000000000000..91579dc6a2b0
--- /dev/null
+++ b/drivers/s390/net/smsgiucv_app.c
@@ -0,0 +1,211 @@
+/*
+ * Deliver z/VM CP special messages (SMSG) as uevents.
+ *
+ * The driver registers for z/VM CP special messages with the
+ * "APP" prefix. Incoming messages are delivered to user space
+ * as uevents.
+ *
+ * Copyright IBM Corp. 2010
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ *
+ */
+#define KMSG_COMPONENT          "smsgiucv_app"
+#define pr_fmt(fmt)             KMSG_COMPONENT ": " fmt
+#include <linux/ctype.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/kobject.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <net/iucv/iucv.h>
+#include "smsgiucv.h"
+/* prefix used for SMSG registration */
+#define SMSG_PREFIX             "APP"
+/* SMSG related uevent environment variables */
+#define ENV_SENDER_STR          "SMSG_SENDER="
+#define ENV_SENDER_LEN          (strlen(ENV_SENDER_STR) + 8 + 1)
+#define ENV_PREFIX_STR          "SMSG_ID="
+#define ENV_PREFIX_LEN          (strlen(ENV_PREFIX_STR) + \
+                                 strlen(SMSG_PREFIX) + 1)
+#define ENV_TEXT_STR            "SMSG_TEXT="
+#define ENV_TEXT_LEN(msg)       (strlen(ENV_TEXT_STR) + strlen((msg)) + 1)
+/* z/VM user ID which is permitted to send SMSGs
+ * If the value is undefined or empty (""), special messages are
+ * accepted from any z/VM user ID. */
+static char *sender;
+module_param(sender, charp, 0400);
+MODULE_PARM_DESC(sender, "z/VM user ID from which CP SMSGs are accepted");
+/* SMSG device representation */
+static struct device *smsg_app_dev;
+/* list element for queuing received messages for delivery */
+struct smsg_app_event {
+        struct list_head list;
+        char *buf;
+        char *envp[4];
+};
+/* queue for outgoing uevents */
+static LIST_HEAD(smsg_event_queue);
+static DEFINE_SPINLOCK(smsg_event_queue_lock);
+static void smsg_app_event_free(struct smsg_app_event *ev)
+{
+        kfree(ev->buf);
+        kfree(ev);
+}
+static struct smsg_app_event *smsg_app_event_alloc(const char *from,
+                                                   const char *msg)
+{
+        struct smsg_app_event *ev;
+        ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
+        if (!ev)
+                return NULL;
+        ev->buf = kzalloc(ENV_SENDER_LEN + ENV_PREFIX_LEN +
+                          ENV_TEXT_LEN(msg), GFP_ATOMIC);
+        if (!ev->buf) {
+                kfree(ev);
+                return NULL;
+        }
+        /* setting up environment pointers into buf */
+        ev->envp[0] = ev->buf;
+        ev->envp[1] = ev->envp[0] + ENV_SENDER_LEN;
+        ev->envp[2] = ev->envp[1] + ENV_PREFIX_LEN;
+        ev->envp[3] = NULL;
+        /* setting up environment: sender, prefix name, and message text */
+        snprintf(ev->envp[0], ENV_SENDER_LEN, ENV_SENDER_STR "%s", from);
+        snprintf(ev->envp[1], ENV_PREFIX_LEN, ENV_PREFIX_STR "%s", SMSG_PREFIX);
+        snprintf(ev->envp[2], ENV_TEXT_LEN(msg), ENV_TEXT_STR "%s", msg);
+        return ev;
+}
+static void smsg_event_work_fn(struct work_struct *work)
+{
+        LIST_HEAD(event_queue);
+        struct smsg_app_event *p, *n;
+        struct device *dev;
+        dev = get_device(smsg_app_dev);
+        if (!dev)
+                return;
+        spin_lock_bh(&smsg_event_queue_lock);
+        list_splice_init(&smsg_event_queue, &event_queue);
+        spin_unlock_bh(&smsg_event_queue_lock);
+        list_for_each_entry_safe(p, n, &event_queue, list) {
+                list_del(&p->list);
+                kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, p->envp);
+                smsg_app_event_free(p);
+        }
+        put_device(dev);
+}
+static DECLARE_WORK(smsg_event_work, smsg_event_work_fn);
+static void smsg_app_callback(const char *from, char *msg)
+{
+        struct smsg_app_event *se;
+        /* check if the originating z/VM user ID matches
+         * the configured sender. */
+        if (sender && strlen(sender) > 0 && strcmp(from, sender) != 0)
+                return;
+        /* get start of message text (skip prefix and leading blanks) */
+        msg += strlen(SMSG_PREFIX);
+        while (*msg && isspace(*msg))
+                msg++;
+        if (*msg == '\0')
+                return;
+        /* allocate event list element and its environment */
+        se = smsg_app_event_alloc(from, msg);
+        if (!se)
+                return;
+        /* queue event and schedule work function */
+        spin_lock(&smsg_event_queue_lock);
+        list_add_tail(&se->list, &smsg_event_queue);
+        spin_unlock(&smsg_event_queue_lock);
+        schedule_work(&smsg_event_work);
+        return;
+}
+static int __init smsgiucv_app_init(void)
+{
+        struct device_driver *smsgiucv_drv;
+        int rc;
+        if (!MACHINE_IS_VM)
+                return -ENODEV;
+        smsg_app_dev = kzalloc(sizeof(*smsg_app_dev), GFP_KERNEL);
+        if (!smsg_app_dev)
+                return -ENOMEM;
+        smsgiucv_drv = driver_find(SMSGIUCV_DRV_NAME, &iucv_bus);
+        if (!smsgiucv_drv) {
+                kfree(smsg_app_dev);
+                return -ENODEV;
+        }
+        rc = dev_set_name(smsg_app_dev, KMSG_COMPONENT);
+        if (rc) {
+                kfree(smsg_app_dev);
+                goto fail_put_driver;
+        }
+        smsg_app_dev->bus = &iucv_bus;
+        smsg_app_dev->parent = iucv_root;
+        smsg_app_dev->release = (void (*)(struct device *)) kfree;
+        smsg_app_dev->driver = smsgiucv_drv;
+        rc = device_register(smsg_app_dev);
+        if (rc) {
+                put_device(smsg_app_dev);
+                goto fail_put_driver;
+        }
+        /* register with the smsgiucv device driver */
+        rc = smsg_register_callback(SMSG_PREFIX, smsg_app_callback);
+        if (rc) {
+                device_unregister(smsg_app_dev);
+                goto fail_put_driver;
+        }
+        rc = 0;
+fail_put_driver:
+        put_driver(smsgiucv_drv);
+        return rc;
+}
+module_init(smsgiucv_app_init);
+static void __exit smsgiucv_app_exit(void)
+{
+        /* unregister callback */
+        smsg_unregister_callback(SMSG_PREFIX, smsg_app_callback);
+        /* cancel pending work and flush any queued event work */
+        cancel_work_sync(&smsg_event_work);
+        smsg_event_work_fn(&smsg_event_work);
+        device_unregister(smsg_app_dev);
+}
+module_exit(smsgiucv_app_exit);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Deliver z/VM CP SMSG as uevents");
+MODULE_AUTHOR("Hendrik Brueckner <brueckner@linux.vnet.ibm.com>");
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 71b97ff77cf0..6479273a3094 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -319,8 +319,6 @@ static void zfcp_qdio_setup_init_data(struct qdio_initialize *id,
        id->input_handler = zfcp_qdio_int_resp;
        id->output_handler = zfcp_qdio_int_req;
        id->int_parm = (unsigned long) qdio;
-        id->flags = QDIO_INBOUND_0COPY_SBALS |
-                    QDIO_OUTBOUND_0COPY_SBALS | QDIO_USE_OUTBOUND_PCIS;
        id->input_sbal_addr_array = (void **) (qdio->resp_q.sbal);
        id->output_sbal_addr_array = (void **) (qdio->req_q.sbal);