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[media] cx23885-dvb: check if dvb_attach() succeded
Fix possible null dereference for Leadtek DTV 3200H XC4000 tuner when no firmware file available. Cc: stable@kernel.org Signed-off-by: Miroslav Slugen <thunder.mmm@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -943,6 +943,11 @@ static int dvb_register(struct cx23885_tsport *port)
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fe = dvb_attach(xc4000_attach, fe0->dvb.frontend,
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&dev->i2c_bus[1].i2c_adap, &cfg);
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if (!fe) {
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printk(KERN_ERR "%s/2: xc4000 attach failed\n",
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dev->name);
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goto frontend_detach;
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}
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}
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break;
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case CX23885_BOARD_TBS_6920:
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