diff options
| -rw-r--r-- | drivers/scsi/cxgb3i/cxgb3i_ddp.c | 54 | ||||
| -rw-r--r-- | drivers/scsi/cxgb3i/cxgb3i_ddp.h | 2 |
2 files changed, 35 insertions, 21 deletions
diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.c b/drivers/scsi/cxgb3i/cxgb3i_ddp.c index 99c91254790..8eb2848403f 100644 --- a/drivers/scsi/cxgb3i/cxgb3i_ddp.c +++ b/drivers/scsi/cxgb3i/cxgb3i_ddp.c @@ -598,30 +598,40 @@ int cxgb3i_adapter_ddp_info(struct t3cdev *tdev, * release all the resource held by the ddp pagepod manager for a given * adapter if needed */ -void cxgb3i_ddp_cleanup(struct t3cdev *tdev) + +static void ddp_cleanup(struct kref *kref) { + struct cxgb3i_ddp_info *ddp = container_of(kref, + struct cxgb3i_ddp_info, + refcnt); int i = 0; + + ddp_log_info("kref release ddp 0x%p, t3dev 0x%p.\n", ddp, ddp->tdev); + + ddp->tdev->ulp_iscsi = NULL; + while (i < ddp->nppods) { + struct cxgb3i_gather_list *gl = ddp->gl_map[i]; + if (gl) { + int npods = (gl->nelem + PPOD_PAGES_MAX - 1) + >> PPOD_PAGES_SHIFT; + ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", + ddp->tdev, i, npods); + kfree(gl); + ddp_free_gl_skb(ddp, i, npods); + i += npods; + } else + i++; + } + cxgb3i_free_big_mem(ddp); +} + +void cxgb3i_ddp_cleanup(struct t3cdev *tdev) +{ struct cxgb3i_ddp_info *ddp = (struct cxgb3i_ddp_info *)tdev->ulp_iscsi; ddp_log_info("t3dev 0x%p, release ddp 0x%p.\n", tdev, ddp); - - if (ddp) { - tdev->ulp_iscsi = NULL; - while (i < ddp->nppods) { - struct cxgb3i_gather_list *gl = ddp->gl_map[i]; - if (gl) { - int npods = (gl->nelem + PPOD_PAGES_MAX - 1) - >> PPOD_PAGES_SHIFT; - ddp_log_info("t3dev 0x%p, ddp %d + %d.\n", - tdev, i, npods); - kfree(gl); - ddp_free_gl_skb(ddp, i, npods); - i += npods; - } else - i++; - } - cxgb3i_free_big_mem(ddp); - } + if (ddp) + kref_put(&ddp->refcnt, ddp_cleanup); } /** @@ -631,12 +641,13 @@ void cxgb3i_ddp_cleanup(struct t3cdev *tdev) */ static void ddp_init(struct t3cdev *tdev) { - struct cxgb3i_ddp_info *ddp; + struct cxgb3i_ddp_info *ddp = tdev->ulp_iscsi; struct ulp_iscsi_info uinfo; unsigned int ppmax, bits; int i, err; - if (tdev->ulp_iscsi) { + if (ddp) { + kref_get(&ddp->refcnt); ddp_log_warn("t3dev 0x%p, ddp 0x%p already set up.\n", tdev, tdev->ulp_iscsi); return; @@ -670,6 +681,7 @@ static void ddp_init(struct t3cdev *tdev) ppmax * sizeof(struct cxgb3i_gather_list *)); spin_lock_init(&ddp->map_lock); + kref_init(&ddp->refcnt); ddp->tdev = tdev; ddp->pdev = uinfo.pdev; diff --git a/drivers/scsi/cxgb3i/cxgb3i_ddp.h b/drivers/scsi/cxgb3i/cxgb3i_ddp.h index 0d296de7cf3..87dd56b422b 100644 --- a/drivers/scsi/cxgb3i/cxgb3i_ddp.h +++ b/drivers/scsi/cxgb3i/cxgb3i_ddp.h @@ -54,6 +54,7 @@ struct cxgb3i_gather_list { * struct cxgb3i_ddp_info - cxgb3i direct data placement for pdu payload * * @list: list head to link elements + * @refcnt: ref. count * @tdev: pointer to t3cdev used by cxgb3 driver * @max_txsz: max tx packet size for ddp * @max_rxsz: max rx packet size for ddp @@ -70,6 +71,7 @@ struct cxgb3i_gather_list { */ struct cxgb3i_ddp_info { struct list_head list; + struct kref refcnt; struct t3cdev *tdev; struct pci_dev *pdev; unsigned int max_txsz; |