diff options
Diffstat (limited to 'drivers/scsi/cxlflash')
| -rw-r--r-- | drivers/scsi/cxlflash/superpipe.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index 04a3bf9dc85f..5ba6e625666d 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -988,6 +988,10 @@ static int cxlflash_disk_detach(struct scsi_device *sdev, * theoretically never occur), every call into this routine results * in a complete freeing of a context. * + * Detaching the LUN is typically an ioctl() operation and the underlying + * code assumes that ioctl_rwsem has been acquired as a reader. To support + * that design point, the semaphore is acquired and released around detach. + * * Return: 0 on success */ static int cxlflash_cxl_release(struct inode *inode, struct file *file) @@ -1026,9 +1030,11 @@ static int cxlflash_cxl_release(struct inode *inode, struct file *file) dev_dbg(dev, "%s: close for ctxid=%d\n", __func__, ctxid); + down_read(&cfg->ioctl_rwsem); detach.context_id = ctxi->ctxid; list_for_each_entry_safe(lun_access, t, &ctxi->luns, list) _cxlflash_disk_detach(lun_access->sdev, ctxi, &detach); + up_read(&cfg->ioctl_rwsem); out_release: cfg->ops->fd_release(inode, file); out: |