---

yaml --- r: 223164 b: refs/heads/master c: c7a841f h: refs/heads/master v: v3
git-mirror · Dec 9, 2010 · d0c8113 · d0c8113
1 parent bbb35b6
commit d0c8113
Show file tree

Hide file tree

Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 057f02a38e67a944a2d0b89bb0111efb9dbe6e6e
+refs/heads/master: c7a841f3aca469187db76842676951a672fd27d1
diff --git a/trunk/block/bsg.c b/trunk/block/bsg.c
@@ -250,6 +250,14 @@ bsg_map_hdr(struct bsg_device *bd, struct sg_io_v4 *hdr, fmode_t has_write_perm,
 	int ret, rw;
 	unsigned int dxfer_len;
 	void *dxferp = NULL;
+	struct bsg_class_device *bcd = &q->bsg_dev;
+
+	/* if the LLD has been removed then the bsg_unregister_queue will
+	 * eventually be called and the class_dev was freed, so we can no
+	 * longer use this request_queue. Return no such address.
+	 */
+	if (!bcd->class_dev)
+		return ERR_PTR(-ENXIO);
 
 	dprintk("map hdr %llx/%u %llx/%u\n", (unsigned long long) hdr->dout_xferp,
 		hdr->dout_xfer_len, (unsigned long long) hdr->din_xferp,