diff options
Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index d6984df71f1c..bf53356f41f0 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -114,7 +114,7 @@ static int check_set(unsigned long long *val, char *src) { char *last; - if (strncmp(src, "-", 20) == 0) { + if (strcmp(src, "-") == 0) { *val = SCAN_WILD_CARD; } else { /* @@ -303,6 +303,8 @@ store_host_reset(struct device *dev, struct device_attribute *attr, if (sht->host_reset) ret = sht->host_reset(shost, type); + else + ret = -EOPNOTSUPP; exit_store_host_reset: if (ret == 0) @@ -426,6 +428,7 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work) struct scsi_device *sdev; struct device *parent; struct list_head *this, *tmp; + struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; unsigned long flags; sdev = container_of(work, struct scsi_device, ew.work); @@ -454,8 +457,17 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work) /* NULL queue means the device can't be used */ sdev->request_queue = NULL; - kfree(sdev->vpd_pg83); - kfree(sdev->vpd_pg80); + mutex_lock(&sdev->inquiry_mutex); + rcu_swap_protected(sdev->vpd_pg80, vpd_pg80, + lockdep_is_held(&sdev->inquiry_mutex)); + rcu_swap_protected(sdev->vpd_pg83, vpd_pg83, + lockdep_is_held(&sdev->inquiry_mutex)); + mutex_unlock(&sdev->inquiry_mutex); + + if (vpd_pg83) + kfree_rcu(vpd_pg83, rcu); + if (vpd_pg80) + kfree_rcu(vpd_pg80, rcu); kfree(sdev->inquiry); kfree(sdev); @@ -793,15 +805,16 @@ show_vpd_##_page(struct file *filp, struct kobject *kobj, \ { \ struct device *dev = container_of(kobj, struct device, kobj); \ struct scsi_device *sdev = to_scsi_device(dev); \ - int ret; \ - if (!sdev->vpd_##_page) \ - return -EINVAL; \ + struct scsi_vpd *vpd_page; \ + int ret = -EINVAL; \ + \ rcu_read_lock(); \ - ret = memory_read_from_buffer(buf, count, &off, \ - rcu_dereference(sdev->vpd_##_page), \ - sdev->vpd_##_page##_len); \ + vpd_page = rcu_dereference(sdev->vpd_##_page); \ + if (vpd_page) \ + ret = memory_read_from_buffer(buf, count, &off, \ + vpd_page->data, vpd_page->len); \ rcu_read_unlock(); \ - return ret; \ + return ret; \ } \ static struct bin_attribute dev_attr_vpd_##_page = { \ .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ |