scsi: cxgb4i: libcxgbi: add missing module_put()

Add module_put() in cxgbi_sock_act_open_req_arp_failure() to release
module reference in case of arp failure, also check return value of
try_module_get() before posting active open hw cmd.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 57401b5..9a2fdc3 100644 (file)
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -801,7 +801,7 @@ static void do_act_establish(struct cxgbi_device *cdev, struct sk_buff *skb)
                       (&csk->saddr), (&csk->daddr),
                       atid, tid, csk, csk->state, csk->flags, rcv_isn);
 
-       module_put(THIS_MODULE);
+       module_put(cdev->owner);
 
        cxgbi_sock_get(csk);
        csk->tid = tid;
@@ -950,7 +950,7 @@ static void do_act_open_rpl(struct cxgbi_device *cdev, struct sk_buff *skb)
        if (is_neg_adv(status))
                goto rel_skb;
 
-       module_put(THIS_MODULE);
+       module_put(cdev->owner);
 
        if (status && status != CPL_ERR_TCAM_FULL &&
            status != CPL_ERR_CONN_EXIST &&
@@ -1713,7 +1713,11 @@ static int init_act_open(struct cxgbi_sock *csk)
                       csk->mtu, csk->mss_idx, csk->smac_idx);
 
        /* must wait for either a act_open_rpl or act_open_establish */
-       try_module_get(THIS_MODULE);
+       if (!try_module_get(cdev->owner)) {
+               pr_err("%s, try_module_get failed.\n", ndev->name);
+               goto rel_resource;
+       }
+
        cxgbi_sock_set_state(csk, CTP_ACTIVE_OPEN);
        if (csk->csk_family == AF_INET)
                send_act_open_req(csk, skb, csk->l2t);
@@ -2027,6 +2031,7 @@ static void *t4_uld_add(const struct cxgb4_lld_info *lldi)
        cdev->skb_tx_rsvd = CXGB4I_TX_HEADER_LEN;
        cdev->skb_rx_extra = sizeof(struct cpl_iscsi_hdr);
        cdev->itp = &cxgb4i_iscsi_transport;
+       cdev->owner = THIS_MODULE;
 
        cdev->pfvf = FW_VIID_PFN_G(cxgb4_port_viid(lldi->ports[0]))
                        << FW_VIID_PFN_S;

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index eb4af12..9f4fde9 100644 (file)
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -896,6 +896,7 @@ EXPORT_SYMBOL_GPL(cxgbi_sock_fail_act_open);
 void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
 {
        struct cxgbi_sock *csk = (struct cxgbi_sock *)skb->sk;
+       struct module *owner = csk->cdev->owner;
 
        log_debug(1 << CXGBI_DBG_SOCK, "csk 0x%p,%u,0x%lx,%u.\n",
                csk, (csk)->state, (csk)->flags, (csk)->tid);
@@ -906,6 +907,8 @@ void cxgbi_sock_act_open_req_arp_failure(void *handle, struct sk_buff *skb)
        spin_unlock_bh(&csk->lock);
        cxgbi_sock_put(csk);
        __kfree_skb(skb);
+
+       module_put(owner);
 }
 EXPORT_SYMBOL_GPL(cxgbi_sock_act_open_req_arp_failure);
 

diff --git a/drivers/scsi/cxgbi/libcxgbi.h b/drivers/scsi/cxgbi/libcxgbi.h
index 85bae61..95ba990 100644 (file)
--- a/drivers/scsi/cxgbi/libcxgbi.h
+++ b/drivers/scsi/cxgbi/libcxgbi.h
@@ -468,6 +468,7 @@ struct cxgbi_device {
        struct pci_dev *pdev;
        struct dentry *debugfs_root;
        struct iscsi_transport *itp;
+       struct module *owner;
 
        unsigned int pfvf;
        unsigned int rx_credit_thres;