V4L/DVB (9689): gspca: Memory leak when disconnect while streaming.

As a side effect, the sd routine stop0 is called on disconnect.
This permits the subdriver to free its resources.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/spca561.c b/drivers/media/video/gspca/spca561.c
index 020a03c466c1..c3de4e44123d 100644
--- a/drivers/media/video/gspca/spca561.c
+++ b/drivers/media/video/gspca/spca561.c
@@ -766,10 +766,13 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
         }
 }
 
+/* called on streamoff with alt 0 and on disconnect */
 static void sd_stop0(struct gspca_dev *gspca_dev)
 {
         struct sd *sd = (struct sd *) gspca_dev;
 
+        if (!gspca_dev->present)
+                return;
         if (sd->chip_revision == Rev012A) {
                 reg_w_val(gspca_dev->dev, 0x8118, 0x29);
                 reg_w_val(gspca_dev->dev, 0x8114, 0x08);