s390/con3270: testing return kzalloc retval

Return value from kzalloc is not tested and
using a null pointer would lead to crash.

Even if this should not happen at this moment, we
may let the system decide if there is a better choice.

Signed-off-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 7c511add5aa7d884d8082398198b1aa92a61dc84..4d7a9badfedee7acebe7289d0d02a3d9d8997ca5 100644 (file)
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -606,6 +606,8 @@ con3270_init(void)
                return PTR_ERR(rp);
 
        condev = kzalloc(sizeof(struct con3270), GFP_KERNEL | GFP_DMA);
+       if (!condev)
+               return -ENOMEM;
        condev->view.dev = rp;
 
        condev->read = raw3270_request_alloc(0);