[openib-general] [PATCH 32 of 53] ipath - fix NULL dereference during cleanup

[Bryan O'Sullivan]

Fix NULL deref due to pcidev being clobbered before dd->ipath_f_cleanup()
was called.

Signed-off-by: Bryan O'Sullivan <bos at pathscale.com>

diff -r 4868daa7f215 -r b9fd1a46c910 drivers/infiniband/hw/ipath/ipath_driver.c
--- a/drivers/infiniband/hw/ipath/ipath_driver.c	Fri May 12 15:55:28 2006 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_driver.c	Fri May 12 15:55:28 2006 -0700
@@ -1897,19 +1897,19 @@ static void __exit infinipath_cleanup(vo
 			} else
 				ipath_dbg("irq is 0, not doing free_irq "
 					  "for unit %u\n", dd->ipath_unit);
+
+			/*
+			 * we check for NULL here, because it's outside
+			 * the kregbase check, and we need to call it
+			 * after the free_irq.  Thus it's possible that
+			 * the function pointers were never initialized.
+			 */
+			if (dd->ipath_f_cleanup)
+				/* clean up chip-specific stuff */
+				dd->ipath_f_cleanup(dd);
+
 			dd->pcidev = NULL;
 		}
-
-		/*
-		 * we check for NULL here, because it's outside the kregbase
-		 * check, and we need to call it after the free_irq.  Thus
-		 * it's possible that the function pointers were never
-		 * initialized.
-		 */
-		if (dd->ipath_f_cleanup)
-			/* clean up chip-specific stuff */
-			dd->ipath_f_cleanup(dd);
-
 		spin_lock_irqsave(&ipath_devs_lock, flags);
 	}