isdn/gigaset: fix NULL pointer dereference
In do_action, a NULL pointer might be passed to function start_dial which will dereference it. Fix by adding a check for NULL before the call. Spotted with Coverity. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1380,6 +1380,11 @@ static void do_action(int action, struct cardstate *cs,
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/* events from the LL */
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case ACT_DIAL:
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if (!ev->ptr) {
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*p_genresp = 1;
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*p_resp_code = RSP_ERROR;
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break;
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}
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start_dial(at_state, ev->ptr, ev->parameter);
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break;
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case ACT_ACCEPT:
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