alx: fix error handling in __alx_open

In commit 9ee7b683 we moved the enablement of msi interrupts earlier in
alx_init_intr. If there is an error in alx_alloc_rings, __alx_open returns
with an error but msi (or msi-x) interrupts stays enabled. Add a new error
label to disable msi (or msi-x) interrupts.

Fixes: 9ee7b683 ("alx: refactor msi enablement and disablement")
Signed-off-by: NTobias Regnery <tobias.regnery@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/atheros/alx/main.c

@@ -1028,7 +1028,7 @@ static int __alx_open(struct alx_priv *alx, bool resume)
 
 	err = alx_alloc_rings(alx);
 	if (err)
-		return err;
+		goto out_disable_adv_intr;
 
 	alx_configure(alx);
 
@@ -1049,6 +1049,8 @@ static int __alx_open(struct alx_priv *alx, bool resume)
 
 out_free_rings:
 	alx_free_rings(alx);
+out_disable_adv_intr:
+	alx_disable_advanced_intr(alx);
 	return err;
 }