When the detach function is called after a failed attach
the usb_dev initialization can cause a NULL pointer
dereference. This happens when the usb device is not found
in the attach procedure.
Remove the usb_dev variable and initialization and change the dev
in the dev_info message from the usb_dev to the gpib_dev.
Fixes: fbae7090f30c ("staging: gpib: Update messaging and usb_device refs in agilent_usb")
Signed-off-by: Dave Penkler <dpenkler@xxxxxxxxx>
---
drivers/staging/gpib/agilent_82357a/agilent_82357a.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/staging/gpib/agilent_82357a/agilent_82357a.c b/drivers/staging/gpib/agilent_82357a/agilent_82357a.c
index 34d85a1bdb37..2aaccebc3c7b 100644
--- a/drivers/staging/gpib/agilent_82357a/agilent_82357a.c
+++ b/drivers/staging/gpib/agilent_82357a/agilent_82357a.c
@@ -1442,12 +1442,10 @@ static int agilent_82357a_go_idle(gpib_board_t *board)
static void agilent_82357a_detach(gpib_board_t *board)
{
struct agilent_82357a_priv *a_priv;
- struct usb_device *usb_dev;
mutex_lock(&agilent_82357a_hotplug_lock);
a_priv = board->private_data;
- usb_dev = interface_to_usbdev(a_priv->bus_interface);
if (a_priv) {
if (a_priv->bus_interface) {
agilent_82357a_go_idle(board);
@@ -1459,7 +1457,7 @@ static void agilent_82357a_detach(gpib_board_t *board)
agilent_82357a_cleanup_urbs(a_priv);
agilent_82357a_free_private(a_priv);
}
- dev_info(&usb_dev->dev, "%s: detached\n", __func__);
+ dev_info(board->gpib_dev, "%s: detached\n", __func__);
mutex_unlock(&agilent_82357a_hotplug_lock);
}
--
2.47.1
