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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>
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@ -1013,7 +1013,7 @@ static long __qeth_check_irb_error(struct ccw_device *cdev,
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card = CARD_FROM_CDEV(cdev);
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if (!IS_ERR(irb))
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if (!card || !IS_ERR(irb))
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return 0;
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switch (PTR_ERR(irb)) {
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@ -1029,7 +1029,7 @@ static long __qeth_check_irb_error(struct ccw_device *cdev,
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QETH_CARD_TEXT(card, 2, "ckirberr");
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QETH_CARD_TEXT_(card, 2, " rc%d", -ETIMEDOUT);
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if (intparm == QETH_RCD_PARM) {
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if (card && (card->data.ccwdev == cdev)) {
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if (card->data.ccwdev == cdev) {
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card->data.state = CH_STATE_DOWN;
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wake_up(&card->wait_q);
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}
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