From 25458eb791acf0e5e65183c5adb3918d8d71d756 Mon Sep 17 00:00:00 2001 From: Christof Schmitt Date: Tue, 24 Nov 2009 16:54:02 +0100 Subject: [PATCH] [SCSI] zfcp: Access ports and units with container_of in sysfs code When accessing port and unit attributes, use container_of instead of dev_get_drvdata. This eliminates some code checker warnings about aliased access of data structures. Reviewed-by: Swen Schillig Signed-off-by: Christof Schmitt Signed-off-by: James Bottomley --- drivers/s390/scsi/zfcp_aux.c | 2 -- drivers/s390/scsi/zfcp_sysfs.c | 15 ++++++++++----- 2 files changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index ed31bd0ff3fb..baef2ec7482f 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -319,7 +319,6 @@ struct zfcp_unit *zfcp_unit_enqueue(struct zfcp_port *port, u64 fcp_lun) kfree(unit); goto err_out; } - dev_set_drvdata(&unit->sysfs_device, unit); retval = -EINVAL; /* mark unit unusable as long as sysfs registration is not complete */ @@ -688,7 +687,6 @@ struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *adapter, u64 wwpn, kfree(port); goto err_out; } - dev_set_drvdata(&port->sysfs_device, port); retval = -EINVAL; if (device_register(&port->sysfs_device)) { diff --git a/drivers/s390/scsi/zfcp_sysfs.c b/drivers/s390/scsi/zfcp_sysfs.c index 181bea0f10fb..901cc9a6ed20 100644 --- a/drivers/s390/scsi/zfcp_sysfs.c +++ b/drivers/s390/scsi/zfcp_sysfs.c @@ -19,7 +19,8 @@ static ssize_t zfcp_sysfs_##_feat##_##_name##_show(struct device *dev, \ struct device_attribute *at,\ char *buf) \ { \ - struct _feat_def *_feat = dev_get_drvdata(dev); \ + struct _feat_def *_feat = container_of(dev, struct _feat_def, \ + sysfs_device); \ \ return sprintf(buf, _format, _value); \ } \ @@ -86,7 +87,8 @@ static ssize_t zfcp_sysfs_##_feat##_failed_show(struct device *dev, \ struct device_attribute *attr, \ char *buf) \ { \ - struct _feat_def *_feat = dev_get_drvdata(dev); \ + struct _feat_def *_feat = container_of(dev, struct _feat_def, \ + sysfs_device); \ \ if (atomic_read(&_feat->status) & ZFCP_STATUS_COMMON_ERP_FAILED) \ return sprintf(buf, "1\n"); \ @@ -97,7 +99,8 @@ static ssize_t zfcp_sysfs_##_feat##_failed_store(struct device *dev, \ struct device_attribute *attr,\ const char *buf, size_t count)\ { \ - struct _feat_def *_feat = dev_get_drvdata(dev); \ + struct _feat_def *_feat = container_of(dev, struct _feat_def, \ + sysfs_device); \ unsigned long val; \ int retval = 0; \ \ @@ -274,7 +277,8 @@ static ssize_t zfcp_sysfs_unit_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_port *port = container_of(dev, struct zfcp_port, + sysfs_device); struct zfcp_unit *unit; u64 fcp_lun; int retval = -EINVAL; @@ -305,7 +309,8 @@ static ssize_t zfcp_sysfs_unit_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct zfcp_port *port = dev_get_drvdata(dev); + struct zfcp_port *port = container_of(dev, struct zfcp_port, + sysfs_device); struct zfcp_unit *unit; u64 fcp_lun; int retval = 0;