svn commit: r326451 - head/sys/dev/bhnd/bhndb

[Landon J. Fuller]

Author: landonf
Date: Sat Dec  2 01:07:41 2017
New Revision: 326451
URL: https://svnweb.freebsd.org/changeset/base/326451

Log:
  bhndb(4): Fix leak of child devices and MSI vectors.
  
  - Add missing call to device_delete_children() in bhndb_detach(), without
    which we're left with stale child devices on module unload.
  - Pass the parent PCI device to pci_release_msi(), not the bhndb_pci(4)
    child.
  
  Approved by:	adrian (mentor, implicit)
  Sponsored by:	The FreeBSD Foundation

Modified:
  head/sys/dev/bhnd/bhndb/bhndb.c
  head/sys/dev/bhnd/bhndb/bhndb_pci.c

Modified: head/sys/dev/bhnd/bhndb/bhndb.c
==============================================================================
--- head/sys/dev/bhnd/bhndb/bhndb.c	Sat Dec  2 00:52:59 2017	(r326450)
+++ head/sys/dev/bhnd/bhndb/bhndb.c	Sat Dec  2 01:07:41 2017	(r326451)
@@ -639,6 +639,10 @@ bhndb_generic_detach(device_t dev)
 	if ((error = bus_generic_detach(dev)))
 		return (error);
 
+	/* Delete children */
+	if ((error = device_delete_children(dev)))
+		return (error);
+
 	/* Clean up our service registry */
 	if ((error = bhnd_service_registry_fini(&sc->services)))
 		return (error);

Modified: head/sys/dev/bhnd/bhndb/bhndb_pci.c
==============================================================================
--- head/sys/dev/bhnd/bhndb/bhndb_pci.c	Sat Dec  2 00:52:59 2017	(r326450)
+++ head/sys/dev/bhnd/bhndb/bhndb_pci.c	Sat Dec  2 01:07:41 2017	(r326451)
@@ -303,8 +303,10 @@ bhndb_pci_alloc_msi(struct bhndb_pci_softc *sc, int *m
 		return (error);
 	}
 
-	if (count < BHNDB_PCI_MSI_COUNT)
+	if (count < BHNDB_PCI_MSI_COUNT) {
+		pci_release_msi(sc->parent);
 		return (ENXIO);
+	}
 
 	*msi_count = count;
 	return (0);
@@ -412,7 +414,7 @@ cleanup:
 		bhndb_free_intr_isrc(sc->isrc);
 
 	if (sc->msi_count > 0)
-		pci_release_msi(dev);
+		pci_release_msi(sc->parent);
 
 	if (cores != NULL)
 		free(cores, M_BHND);
@@ -449,7 +451,7 @@ bhndb_pci_detach(device_t dev)
 
 	/* Release MSI interrupts */
 	if (sc->msi_count > 0)
-		pci_release_msi(dev);
+		pci_release_msi(sc->parent);
 
 	/* Disable PCI bus mastering */
 	pci_disable_busmaster(sc->parent);