diff options
Diffstat (limited to 'drivers/scsi/cxlflash')
| -rw-r--r-- | drivers/scsi/cxlflash/lunmgt.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/cxlflash/lunmgt.c b/drivers/scsi/cxlflash/lunmgt.c index d98ad0ff64c1..8c372fc73e1f 100644 --- a/drivers/scsi/cxlflash/lunmgt.c +++ b/drivers/scsi/cxlflash/lunmgt.c @@ -120,7 +120,8 @@ static struct glun_info *lookup_global(u8 *wwid) * * The LUN is kept both in a local list (per adapter) and in a global list * (across all adapters). Certain attributes of the LUN are local to the - * adapter (such as index, port selection mask etc.). + * adapter (such as index, port selection mask, etc.). + * * The block allocation map is shared across all adapters (i.e. associated * wih the global list). Since different attributes are associated with * the per adapter and global entries, allocate two separate structures for each @@ -128,6 +129,8 @@ static struct glun_info *lookup_global(u8 *wwid) * * Keep a pointer back from the local to the global entry. * + * This routine assumes the caller holds the global mutex. + * * Return: Found/Allocated local lun_info structure on success, NULL on failure */ static struct llun_info *find_and_create_lun(struct scsi_device *sdev, u8 *wwid) @@ -137,7 +140,6 @@ static struct llun_info *find_and_create_lun(struct scsi_device *sdev, u8 *wwid) struct Scsi_Host *shost = sdev->host; struct cxlflash_cfg *cfg = shost_priv(shost); - mutex_lock(&global.mutex); if (unlikely(!wwid)) goto out; @@ -169,7 +171,6 @@ static struct llun_info *find_and_create_lun(struct scsi_device *sdev, u8 *wwid) list_add(&gli->list, &global.gluns); out: - mutex_unlock(&global.mutex); pr_debug("%s: returning %p\n", __func__, lli); return lli; } @@ -235,6 +236,7 @@ int cxlflash_manage_lun(struct scsi_device *sdev, u64 flags = manage->hdr.flags; u32 chan = sdev->channel; + mutex_lock(&global.mutex); lli = find_and_create_lun(sdev, manage->wwid); pr_debug("%s: ENTER: WWID = %016llX%016llX, flags = %016llX li = %p\n", __func__, get_unaligned_le64(&manage->wwid[0]), @@ -261,6 +263,7 @@ int cxlflash_manage_lun(struct scsi_device *sdev, } out: + mutex_unlock(&global.mutex); pr_debug("%s: returning rc=%d\n", __func__, rc); return rc; } |