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qeth: Fix for possible null pointer dereference 

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Frank Blaschka <blaschka@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rickard Strandqvist 2014-05-28 10:22:30 +02:00 committed by David S. Miller
parent 4d520f62e0
commit e95051ff5a
1 changed files with 2 additions and 2 deletions
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4
drivers/s390/net/qeth_core_main.c
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@ -1013,7 +1013,7 @@ static long __qeth_check_irb_error(struct ccw_device *cdev,
card = CARD_FROM_CDEV(cdev);
if (!IS_ERR(irb))
if (!card || !IS_ERR(irb))
return 0;
switch (PTR_ERR(irb)) {
@ -1029,7 +1029,7 @@ static long __qeth_check_irb_error(struct ccw_device *cdev,
QETH_CARD_TEXT(card, 2, "ckirberr");
QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
if (intparm == QETH_RCD_PARM) {
if (card && (card->data.ccwdev == cdev)) {
if (card->data.ccwdev == cdev) {
card->data.state = CH_STATE_DOWN;
wake_up(&card->wait_q);
}