[PATCH] staging: wlags49_h2: fix error handling in pcmcia probe function

[Alexey Khoroshilov]

wl_adapter_attach() ignores some important issues
such as register_netdev() failure. The patch fixes it.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshi...@ispras.ru>
---
 drivers/staging/wlags49_h2/wl_cs.c |   13 ++++++++-----
 drivers/staging/wlags49_h2/wl_cs.h |    4 ++--
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/wlags49_h2/wl_cs.c 
b/drivers/staging/wlags49_h2/wl_cs.c
index 7c7c77f..f9e5fd3 100644
--- a/drivers/staging/wlags49_h2/wl_cs.c
+++ b/drivers/staging/wlags49_h2/wl_cs.c
@@ -133,6 +133,7 @@ static int wl_adapter_attach(struct pcmcia_device *link)
 {
        struct net_device   *dev;
        struct wl_private   *lp;
+       int ret;
        /*--------------------------------------------------------------------*/
 
        DBG_FUNC("wl_adapter_attach");
@@ -154,10 +155,12 @@ static int wl_adapter_attach(struct pcmcia_device *link)
        lp = wl_priv(dev);
        lp->link = link;
 
-       wl_adapter_insert(link);
+       ret = wl_adapter_insert(link);
+       if (ret != 0)
+               wl_device_dealloc(dev);
 
        DBG_LEAVE(DbgInfo);
-       return 0;
+       return ret;
 } /* wl_adapter_attach */
 
/*============================================================================*/
 
@@ -224,7 +227,7 @@ static int wl_adapter_resume(struct pcmcia_device *link)
        return 0;
 } /* wl_adapter_resume */
 
-void wl_adapter_insert(struct pcmcia_device *link)
+int wl_adapter_insert(struct pcmcia_device *link)
 {
        struct net_device *dev;
        int ret;
@@ -267,13 +270,13 @@ void wl_adapter_insert(struct pcmcia_device *link)
                " %pM\n", dev->name, dev->base_addr, dev->irq, dev->dev_addr);
 
        DBG_LEAVE(DbgInfo);
-       return;
+       return 0;
 
 failed:
        wl_adapter_release(link);
 
        DBG_LEAVE(DbgInfo);
-       return;
+       return ret;
 } /* wl_adapter_insert */
 
/*============================================================================*/
 
diff --git a/drivers/staging/wlags49_h2/wl_cs.h 
b/drivers/staging/wlags49_h2/wl_cs.h
index a7ab579..081cc6f 100644
--- a/drivers/staging/wlags49_h2/wl_cs.h
+++ b/drivers/staging/wlags49_h2/wl_cs.h
@@ -65,10 +65,10 @@
 
 
 
/*******************************************************************************
- *  function protoypes
+ *  function prototypes
  
******************************************************************************/
 
-void wl_adapter_insert(struct pcmcia_device *link);
+int wl_adapter_insert(struct pcmcia_device *link);
 
 void wl_adapter_release(struct pcmcia_device *link);
 
-- 
1.7.9.5

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