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authorJon Mason <jon.mason@intel.com>2013-07-30 15:58:49 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-11-13 12:05:35 +0900
commitcfa234b144de51eb96e877ee0bee47a3420e8bed (patch)
tree8936f0e7cbb10046f8f39188dd99de4cc70d1caf /drivers/ntb/ntb_transport.c
parent8293fc2416f0eb13ff81501b31f0206c5331b9cb (diff)
downloadlinux-linaro-stable-cfa234b144de51eb96e877ee0bee47a3420e8bed.tar.gz
NTB: Correct debugfs to work with more than 1 NTB Device
commit 1517a3f21a1dd321f16bcf44204bddff9d21abd0 upstream. Debugfs was setup in NTB to only have a single debugfs directory. This resulted in the leaking of debugfs directories and files when multiple NTB devices were present, due to each device stomping on the variables containing the previous device's values (thus preventing them from being freed on cleanup). Correct this by creating a secondary directory of the PCI BDF for each device present, and nesting the previously existing information in those directories. Signed-off-by: Jon Mason <jon.mason@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ntb/ntb_transport.c')
-rw-r--r--drivers/ntb/ntb_transport.c17
1 files changed, 5 insertions, 12 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index f8d7081ee301..c3089151aa49 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -157,7 +157,6 @@ struct ntb_transport {
bool transport_link;
struct delayed_work link_work;
struct work_struct link_cleanup;
- struct dentry *debugfs_dir;
};
enum {
@@ -824,12 +823,12 @@ static void ntb_transport_init_queue(struct ntb_transport *nt,
qp->tx_max_frame = min(transport_mtu, tx_size / 2);
qp->tx_max_entry = tx_size / qp->tx_max_frame;
- if (nt->debugfs_dir) {
+ if (ntb_query_debugfs(nt->ndev)) {
char debugfs_name[4];
snprintf(debugfs_name, 4, "qp%d", qp_num);
qp->debugfs_dir = debugfs_create_dir(debugfs_name,
- nt->debugfs_dir);
+ ntb_query_debugfs(nt->ndev));
qp->debugfs_stats = debugfs_create_file("stats", S_IRUSR,
qp->debugfs_dir, qp,
@@ -857,11 +856,6 @@ int ntb_transport_init(struct pci_dev *pdev)
if (!nt)
return -ENOMEM;
- if (debugfs_initialized())
- nt->debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL);
- else
- nt->debugfs_dir = NULL;
-
nt->ndev = ntb_register_transport(pdev, nt);
if (!nt->ndev) {
rc = -EIO;
@@ -907,7 +901,6 @@ err2:
err1:
ntb_unregister_transport(nt->ndev);
err:
- debugfs_remove_recursive(nt->debugfs_dir);
kfree(nt);
return rc;
}
@@ -921,16 +914,16 @@ void ntb_transport_free(void *transport)
nt->transport_link = NTB_LINK_DOWN;
/* verify that all the qp's are freed */
- for (i = 0; i < nt->max_qps; i++)
+ for (i = 0; i < nt->max_qps; i++) {
if (!test_bit(i, &nt->qp_bitmap))
ntb_transport_free_queue(&nt->qps[i]);
+ debugfs_remove_recursive(nt->qps[i].debugfs_dir);
+ }
ntb_bus_remove(nt);
cancel_delayed_work_sync(&nt->link_work);
- debugfs_remove_recursive(nt->debugfs_dir);
-
ntb_unregister_event_callback(nt->ndev);
pdev = ntb_query_pdev(nt->ndev);