From 521674e4ffad2b2fc8c56cd79e4b2c07c074e9cb Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 14 May 2012 12:58:26 +0200 Subject: s390/claw: remove "eieio" calls If the code really depends on ordering it's already racy. The additional memory barriers (eieio) don't help with that. If the code is not racy the memory barriers also aren't needed. In any case, just remove them. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- drivers/s390/net/claw.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'drivers/s390/net/claw.c') diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c index b41fae37d3af..4c3d4f675149 100644 --- a/drivers/s390/net/claw.c +++ b/drivers/s390/net/claw.c @@ -136,7 +136,6 @@ static inline void claw_set_busy(struct net_device *dev) { ((struct claw_privbk *)dev->ml_priv)->tbusy = 1; - eieio(); } static inline void @@ -144,13 +143,11 @@ claw_clear_busy(struct net_device *dev) { clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy)); netif_wake_queue(dev); - eieio(); } static inline int claw_check_busy(struct net_device *dev) { - eieio(); return ((struct claw_privbk *) dev->ml_priv)->tbusy; } -- cgit v1.2.2 From 2ced5514b3ffd4bd53588eee50c5cf8aa5f3fbcc Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 15 May 2012 18:00:49 +0200 Subject: s390/claw: switch to ccwgroup_create_dev Switch to the new ccwgroup_create_dev interface. Also wrap device attributes in a struct device_type and let the driver core create these attributes automagically. Reviewed-by: Cornelia Huck Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/net/claw.c | 132 ++++++++++++++++++++---------------------------- 1 file changed, 54 insertions(+), 78 deletions(-) (limited to 'drivers/s390/net/claw.c') diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c index 4c3d4f675149..f7e7dcd74817 100644 --- a/drivers/s390/net/claw.c +++ b/drivers/s390/net/claw.c @@ -230,8 +230,6 @@ static ssize_t claw_rbuff_show(struct device *dev, static ssize_t claw_rbuff_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); -static int claw_add_files(struct device *dev); -static void claw_remove_files(struct device *dev); /* Functions for System Validate */ static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw); @@ -266,7 +264,7 @@ static struct ccwgroup_driver claw_group_driver = { }, .max_slaves = 2, .driver_id = 0xC3D3C1E6, - .probe = claw_probe, + .setup = claw_probe, .remove = claw_remove_device, .set_online = claw_new_device, .set_offline = claw_shutdown_device, @@ -290,17 +288,14 @@ static struct ccw_driver claw_ccw_driver = { .int_class = IOINT_CLW, }; -static ssize_t -claw_driver_group_store(struct device_driver *ddrv, const char *buf, - size_t count) +static ssize_t claw_driver_group_store(struct device_driver *ddrv, + const char *buf, size_t count) { int err; - err = ccwgroup_create_from_string(claw_root_dev, - claw_group_driver.driver_id, - &claw_ccw_driver, 2, buf); + err = ccwgroup_create_dev(claw_root_dev, claw_group_driver.driver_id, + &claw_group_driver, 2, buf); return err ? err : count; } - static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store); static struct attribute *claw_group_attrs[] = { @@ -321,60 +316,6 @@ static const struct attribute_group *claw_group_attr_groups[] = { * Key functions */ -/*----------------------------------------------------------------* - * claw_probe * - * this function is called for each CLAW device. * - *----------------------------------------------------------------*/ -static int -claw_probe(struct ccwgroup_device *cgdev) -{ - int rc; - struct claw_privbk *privptr=NULL; - - CLAW_DBF_TEXT(2, setup, "probe"); - if (!get_device(&cgdev->dev)) - return -ENODEV; - privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL); - dev_set_drvdata(&cgdev->dev, privptr); - if (privptr == NULL) { - probe_error(cgdev); - put_device(&cgdev->dev); - CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); - return -ENOMEM; - } - privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL); - privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL); - if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) { - probe_error(cgdev); - put_device(&cgdev->dev); - CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); - return -ENOMEM; - } - memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8); - memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8); - memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8); - privptr->p_env->packing = 0; - privptr->p_env->write_buffers = 5; - privptr->p_env->read_buffers = 5; - privptr->p_env->read_size = CLAW_FRAME_SIZE; - privptr->p_env->write_size = CLAW_FRAME_SIZE; - rc = claw_add_files(&cgdev->dev); - if (rc) { - probe_error(cgdev); - put_device(&cgdev->dev); - dev_err(&cgdev->dev, "Creating the /proc files for a new" - " CLAW device failed\n"); - CLAW_DBF_TEXT_(2, setup, "probex%d", rc); - return rc; - } - privptr->p_env->p_priv = privptr; - cgdev->cdev[0]->handler = claw_irq_handler; - cgdev->cdev[1]->handler = claw_irq_handler; - CLAW_DBF_TEXT(2, setup, "prbext 0"); - - return 0; -} /* end of claw_probe */ - /*-------------------------------------------------------------------* * claw_tx * *-------------------------------------------------------------------*/ @@ -3090,7 +3031,6 @@ claw_remove_device(struct ccwgroup_device *cgdev) dev_info(&cgdev->dev, " will be removed.\n"); if (cgdev->state == CCWGROUP_ONLINE) claw_shutdown_device(cgdev); - claw_remove_files(&cgdev->dev); kfree(priv->p_mtc_envelope); priv->p_mtc_envelope=NULL; kfree(priv->p_env); @@ -3318,7 +3258,6 @@ claw_rbuff_write(struct device *dev, struct device_attribute *attr, CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers); return count; } - static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write); static struct attribute *claw_attr[] = { @@ -3329,24 +3268,61 @@ static struct attribute *claw_attr[] = { &dev_attr_host_name.attr, NULL, }; - static struct attribute_group claw_attr_group = { .attrs = claw_attr, }; +static const struct attribute_group *claw_attr_groups[] = { + &claw_attr_group, + NULL, +}; +static const struct device_type claw_devtype = { + .name = "claw", + .groups = claw_attr_groups, +}; -static int -claw_add_files(struct device *dev) +/*----------------------------------------------------------------* + * claw_probe * + * this function is called for each CLAW device. * + *----------------------------------------------------------------*/ +static int claw_probe(struct ccwgroup_device *cgdev) { - CLAW_DBF_TEXT(2, setup, "add_file"); - return sysfs_create_group(&dev->kobj, &claw_attr_group); -} + struct claw_privbk *privptr = NULL; -static void -claw_remove_files(struct device *dev) -{ - CLAW_DBF_TEXT(2, setup, "rem_file"); - sysfs_remove_group(&dev->kobj, &claw_attr_group); -} + CLAW_DBF_TEXT(2, setup, "probe"); + if (!get_device(&cgdev->dev)) + return -ENODEV; + privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL); + dev_set_drvdata(&cgdev->dev, privptr); + if (privptr == NULL) { + probe_error(cgdev); + put_device(&cgdev->dev); + CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); + return -ENOMEM; + } + privptr->p_mtc_envelope = kzalloc(MAX_ENVELOPE_SIZE, GFP_KERNEL); + privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL); + if ((privptr->p_mtc_envelope == NULL) || (privptr->p_env == NULL)) { + probe_error(cgdev); + put_device(&cgdev->dev); + CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); + return -ENOMEM; + } + memcpy(privptr->p_env->adapter_name, WS_NAME_NOT_DEF, 8); + memcpy(privptr->p_env->host_name, WS_NAME_NOT_DEF, 8); + memcpy(privptr->p_env->api_type, WS_NAME_NOT_DEF, 8); + privptr->p_env->packing = 0; + privptr->p_env->write_buffers = 5; + privptr->p_env->read_buffers = 5; + privptr->p_env->read_size = CLAW_FRAME_SIZE; + privptr->p_env->write_size = CLAW_FRAME_SIZE; + privptr->p_env->p_priv = privptr; + cgdev->cdev[0]->handler = claw_irq_handler; + cgdev->cdev[1]->handler = claw_irq_handler; + cgdev->dev.type = &claw_devtype; + CLAW_DBF_TEXT(2, setup, "prbext 0"); + + return 0; +} /* end of claw_probe */ /*--------------------------------------------------------------------* * claw_init and cleanup * -- cgit v1.2.2 From 9814fdfbecbb030454c46ebab88f8ea9819bc143 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 15 May 2012 18:03:46 +0200 Subject: s390/ccwgroup: remove ccwgroup_create_from_string Remove the old ccwgroup_create_from_string interface since all drivers have been converted to ccwgroup_create_dev. Also remove now unused members of ccwgroup_driver. Reviewed-by: Cornelia Huck Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/net/claw.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) (limited to 'drivers/s390/net/claw.c') diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c index f7e7dcd74817..634c7e8e631d 100644 --- a/drivers/s390/net/claw.c +++ b/drivers/s390/net/claw.c @@ -262,12 +262,10 @@ static struct ccwgroup_driver claw_group_driver = { .owner = THIS_MODULE, .name = "claw", }, - .max_slaves = 2, - .driver_id = 0xC3D3C1E6, .setup = claw_probe, - .remove = claw_remove_device, - .set_online = claw_new_device, - .set_offline = claw_shutdown_device, + .remove = claw_remove_device, + .set_online = claw_new_device, + .set_offline = claw_shutdown_device, .prepare = claw_pm_prepare, }; @@ -292,8 +290,7 @@ static ssize_t claw_driver_group_store(struct device_driver *ddrv, const char *buf, size_t count) { int err; - err = ccwgroup_create_dev(claw_root_dev, claw_group_driver.driver_id, - &claw_group_driver, 2, buf); + err = ccwgroup_create_dev(claw_root_dev, &claw_group_driver, 2, buf); return err ? err : count; } static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store); -- cgit v1.2.2 From a43f8de6723cbf0016d530998b9d43498156c9d0 Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Tue, 15 May 2012 18:06:29 +0200 Subject: s390/claw: cleanup drv attr usage Rename attributes of the claw_group_driver. Also get rid of the call to driver_remove_file. Reviewed-by: Cornelia Huck Signed-off-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/net/claw.c | 23 ++++++++--------------- 1 file changed, 8 insertions(+), 15 deletions(-) (limited to 'drivers/s390/net/claw.c') diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c index 634c7e8e631d..6b1ff90d2f00 100644 --- a/drivers/s390/net/claw.c +++ b/drivers/s390/net/claw.c @@ -295,17 +295,15 @@ static ssize_t claw_driver_group_store(struct device_driver *ddrv, } static DRIVER_ATTR(group, 0200, NULL, claw_driver_group_store); -static struct attribute *claw_group_attrs[] = { +static struct attribute *claw_drv_attrs[] = { &driver_attr_group.attr, NULL, }; - -static struct attribute_group claw_group_attr_group = { - .attrs = claw_group_attrs, +static struct attribute_group claw_drv_attr_group = { + .attrs = claw_drv_attrs, }; - -static const struct attribute_group *claw_group_attr_groups[] = { - &claw_group_attr_group, +static const struct attribute_group *claw_drv_attr_groups[] = { + &claw_drv_attr_group, NULL, }; @@ -3325,17 +3323,13 @@ static int claw_probe(struct ccwgroup_device *cgdev) * claw_init and cleanup * *---------------------------------------------------------------------*/ -static void __exit -claw_cleanup(void) +static void __exit claw_cleanup(void) { - driver_remove_file(&claw_group_driver.driver, - &driver_attr_group); ccwgroup_driver_unregister(&claw_group_driver); ccw_driver_unregister(&claw_ccw_driver); root_device_unregister(claw_root_dev); claw_unregister_debug_facility(); pr_info("Driver unloaded\n"); - } /** @@ -3344,8 +3338,7 @@ claw_cleanup(void) * * @return 0 on success, !0 on error. */ -static int __init -claw_init(void) +static int __init claw_init(void) { int ret = 0; @@ -3364,7 +3357,7 @@ claw_init(void) ret = ccw_driver_register(&claw_ccw_driver); if (ret) goto ccw_err; - claw_group_driver.driver.groups = claw_group_attr_groups; + claw_group_driver.driver.groups = claw_drv_attr_groups; ret = ccwgroup_driver_register(&claw_group_driver); if (ret) goto ccwgroup_err; -- cgit v1.2.2