diff options
| -rw-r--r-- | drivers/scsi/osst.c | 131 |
1 files changed, 91 insertions, 40 deletions
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c index 9ecb323ebae..824fe080d1d 100644 --- a/drivers/scsi/osst.c +++ b/drivers/scsi/osst.c @@ -5206,12 +5206,12 @@ static struct osst_buffer * new_tape_buffer( int from_initialization, int need_d priority = GFP_KERNEL; i = sizeof(struct osst_buffer) + (osst_max_sg_segs - 1) * sizeof(struct scatterlist); - tb = (struct osst_buffer *)kmalloc(i, priority); + tb = kzalloc(i, priority); if (!tb) { printk(KERN_NOTICE "osst :I: Can't allocate new tape buffer.\n"); return NULL; } - memset(tb, 0, i); + tb->sg_segs = tb->orig_sg_segs = 0; tb->use_sg = max_sg; tb->in_use = 1; @@ -5574,9 +5574,9 @@ static ssize_t osst_version_show(struct device_driver *ddd, char *buf) static DRIVER_ATTR(version, S_IRUGO, osst_version_show, NULL); -static void osst_create_driverfs_files(struct device_driver *driverfs) +static int osst_create_driverfs_files(struct device_driver *driverfs) { - driver_create_file(driverfs, &driver_attr_version); + return driver_create_file(driverfs, &driver_attr_version); } static void osst_remove_driverfs_files(struct device_driver *driverfs) @@ -5662,50 +5662,70 @@ CLASS_DEVICE_ATTR(file_count, S_IRUGO, osst_filemark_cnt_show, NULL); static struct class *osst_sysfs_class; -static int osst_sysfs_valid = 0; - -static void osst_sysfs_init(void) +static int osst_sysfs_init(void) { osst_sysfs_class = class_create(THIS_MODULE, "onstream_tape"); - if ( IS_ERR(osst_sysfs_class) ) - printk(KERN_WARNING "osst :W: Unable to register sysfs class\n"); - else - osst_sysfs_valid = 1; + if (IS_ERR(osst_sysfs_class)) { + printk(KERN_ERR "osst :W: Unable to register sysfs class\n"); + return PTR_ERR(osst_sysfs_class); + } + + return 0; } -static void osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * STp, char * name) +static void osst_sysfs_destroy(dev_t dev) { - struct class_device *osst_class_member; + class_device_destroy(osst_sysfs_class, dev); +} - if (!osst_sysfs_valid) return; +static int osst_sysfs_add(dev_t dev, struct device *device, struct osst_tape * STp, char * name) +{ + struct class_device *osst_class_member; + int err; - osst_class_member = class_device_create(osst_sysfs_class, NULL, dev, device, "%s", name); + osst_class_member = class_device_create(osst_sysfs_class, NULL, dev, + device, "%s", name); if (IS_ERR(osst_class_member)) { printk(KERN_WARNING "osst :W: Unable to add sysfs class member %s\n", name); - return; + return PTR_ERR(osst_class_member); } + class_set_devdata(osst_class_member, STp); - class_device_create_file(osst_class_member, &class_device_attr_ADR_rev); - class_device_create_file(osst_class_member, &class_device_attr_media_version); - class_device_create_file(osst_class_member, &class_device_attr_capacity); - class_device_create_file(osst_class_member, &class_device_attr_BOT_frame); - class_device_create_file(osst_class_member, &class_device_attr_EOD_frame); - class_device_create_file(osst_class_member, &class_device_attr_file_count); -} + err = class_device_create_file(osst_class_member, + &class_device_attr_ADR_rev); + if (err) + goto err_out; + err = class_device_create_file(osst_class_member, + &class_device_attr_media_version); + if (err) + goto err_out; + err = class_device_create_file(osst_class_member, + &class_device_attr_capacity); + if (err) + goto err_out; + err = class_device_create_file(osst_class_member, + &class_device_attr_BOT_frame); + if (err) + goto err_out; + err = class_device_create_file(osst_class_member, + &class_device_attr_EOD_frame); + if (err) + goto err_out; + err = class_device_create_file(osst_class_member, + &class_device_attr_file_count); + if (err) + goto err_out; -static void osst_sysfs_destroy(dev_t dev) -{ - if (!osst_sysfs_valid) return; + return 0; - class_device_destroy(osst_sysfs_class, dev); +err_out: + osst_sysfs_destroy(dev); + return err; } static void osst_sysfs_cleanup(void) { - if (osst_sysfs_valid) { - class_destroy(osst_sysfs_class); - osst_sysfs_valid = 0; - } + class_destroy(osst_sysfs_class); } /* @@ -5720,7 +5740,7 @@ static int osst_probe(struct device *dev) struct st_partstat * STps; struct osst_buffer * buffer; struct gendisk * drive; - int i, dev_num; + int i, dev_num, err = -ENODEV; if (SDp->type != TYPE_TAPE || !osst_supports(SDp)) return -ENODEV; @@ -5848,13 +5868,20 @@ static int osst_probe(struct device *dev) init_MUTEX(&tpnt->lock); osst_nr_dev++; write_unlock(&os_scsi_tapes_lock); + { char name[8]; + /* Rewind entry */ - osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num), dev, tpnt, tape_name(tpnt)); + err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num), dev, tpnt, tape_name(tpnt)); + if (err) + goto out_free_buffer; + /* No-rewind entry */ snprintf(name, 8, "%s%s", "n", tape_name(tpnt)); - osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num + 128), dev, tpnt, name); + err = osst_sysfs_add(MKDEV(OSST_MAJOR, dev_num + 128), dev, tpnt, name); + if (err) + goto out_free_sysfs1; } sdev_printk(KERN_INFO, SDp, @@ -5863,9 +5890,13 @@ static int osst_probe(struct device *dev) return 0; +out_free_sysfs1: + osst_sysfs_destroy(MKDEV(OSST_MAJOR, dev_num)); +out_free_buffer: + kfree(buffer); out_put_disk: put_disk(drive); - return -ENODEV; + return err; }; static int osst_remove(struct device *dev) @@ -5902,19 +5933,39 @@ static int osst_remove(struct device *dev) static int __init init_osst(void) { + int err; + printk(KERN_INFO "osst :I: Tape driver with OnStream support version %s\nosst :I: %s\n", osst_version, cvsid); validate_options(); - osst_sysfs_init(); - if ((register_chrdev(OSST_MAJOR,"osst", &osst_fops) < 0) || scsi_register_driver(&osst_template.gendrv)) { + err = osst_sysfs_init(); + if (err) + return err; + + err = register_chrdev(OSST_MAJOR, "osst", &osst_fops); + if (err < 0) { printk(KERN_ERR "osst :E: Unable to register major %d for OnStream tapes\n", OSST_MAJOR); - osst_sysfs_cleanup(); - return 1; + goto err_out; } - osst_create_driverfs_files(&osst_template.gendrv); + + err = scsi_register_driver(&osst_template.gendrv); + if (err) + goto err_out_chrdev; + + err = osst_create_driverfs_files(&osst_template.gendrv); + if (err) + goto err_out_scsidrv; return 0; + +err_out_scsidrv: + scsi_unregister_driver(&osst_template.gendrv); +err_out_chrdev: + unregister_chrdev(OSST_MAJOR, "osst"); +err_out: + osst_sysfs_cleanup(); + return err; } static void __exit exit_osst (void) |