forked from luck/tmp_suning_uos_patched
[media] serial_ir: ensure we're ready to receive interrupts
When the interrupt requested with devm_request_irq(), serial_ir.rcdev is still null so will cause null deference if the irq handler is called early on. Also ensure that timeout_timer is setup. Link: http://lkml.kernel.org/r/CA+55aFxsh2uF8gi5sN_guY3Z+tiLv7LpJYKBw+y8vqLzp+TsnQ@mail.gmail.com [mchehab@s-opensource.com: moved serial_ir_probe() back to its original place] Cc: <stable@vger.kernel.org> # 4.10 Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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9eeb0ed0f3
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0265634eb9
@ -487,10 +487,69 @@ static void serial_ir_timeout(unsigned long arg)
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ir_raw_event_handle(serial_ir.rcdev);
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}
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/* Needed by serial_ir_probe() */
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static int serial_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
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unsigned int count);
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static int serial_ir_tx_duty_cycle(struct rc_dev *dev, u32 cycle);
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static int serial_ir_tx_carrier(struct rc_dev *dev, u32 carrier);
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static int serial_ir_open(struct rc_dev *rcdev);
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static void serial_ir_close(struct rc_dev *rcdev);
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static int serial_ir_probe(struct platform_device *dev)
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{
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struct rc_dev *rcdev;
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int i, nlow, nhigh, result;
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rcdev = devm_rc_allocate_device(&dev->dev, RC_DRIVER_IR_RAW);
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if (!rcdev)
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return -ENOMEM;
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if (hardware[type].send_pulse && hardware[type].send_space)
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rcdev->tx_ir = serial_ir_tx;
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if (hardware[type].set_send_carrier)
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rcdev->s_tx_carrier = serial_ir_tx_carrier;
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if (hardware[type].set_duty_cycle)
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rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle;
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switch (type) {
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case IR_HOMEBREW:
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rcdev->input_name = "Serial IR type home-brew";
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break;
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case IR_IRDEO:
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rcdev->input_name = "Serial IR type IRdeo";
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break;
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case IR_IRDEO_REMOTE:
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rcdev->input_name = "Serial IR type IRdeo remote";
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break;
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case IR_ANIMAX:
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rcdev->input_name = "Serial IR type AnimaX";
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break;
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case IR_IGOR:
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rcdev->input_name = "Serial IR type IgorPlug";
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break;
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}
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rcdev->input_phys = KBUILD_MODNAME "/input0";
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rcdev->input_id.bustype = BUS_HOST;
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rcdev->input_id.vendor = 0x0001;
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rcdev->input_id.product = 0x0001;
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rcdev->input_id.version = 0x0100;
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rcdev->open = serial_ir_open;
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rcdev->close = serial_ir_close;
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rcdev->dev.parent = &serial_ir.pdev->dev;
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rcdev->allowed_protocols = RC_BIT_ALL_IR_DECODER;
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rcdev->driver_name = KBUILD_MODNAME;
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rcdev->map_name = RC_MAP_RC6_MCE;
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rcdev->min_timeout = 1;
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rcdev->timeout = IR_DEFAULT_TIMEOUT;
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rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
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rcdev->rx_resolution = 250000;
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serial_ir.rcdev = rcdev;
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setup_timer(&serial_ir.timeout_timer, serial_ir_timeout,
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(unsigned long)&serial_ir);
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result = devm_request_irq(&dev->dev, irq, serial_ir_irq_handler,
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share_irq ? IRQF_SHARED : 0,
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KBUILD_MODNAME, &hardware);
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@ -516,9 +575,6 @@ static int serial_ir_probe(struct platform_device *dev)
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return -EBUSY;
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}
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setup_timer(&serial_ir.timeout_timer, serial_ir_timeout,
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(unsigned long)&serial_ir);
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result = hardware_init_port();
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if (result < 0)
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return result;
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@ -552,7 +608,8 @@ static int serial_ir_probe(struct platform_device *dev)
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sense ? "low" : "high");
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dev_dbg(&dev->dev, "Interrupt %d, port %04x obtained\n", irq, io);
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return 0;
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return devm_rc_register_device(&dev->dev, rcdev);
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}
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static int serial_ir_open(struct rc_dev *rcdev)
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@ -723,7 +780,6 @@ static void serial_ir_exit(void)
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static int __init serial_ir_init_module(void)
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{
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struct rc_dev *rcdev;
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int result;
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switch (type) {
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@ -754,63 +810,9 @@ static int __init serial_ir_init_module(void)
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sense = !!sense;
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result = serial_ir_init();
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if (result)
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return result;
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rcdev = devm_rc_allocate_device(&serial_ir.pdev->dev, RC_DRIVER_IR_RAW);
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if (!rcdev) {
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result = -ENOMEM;
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goto serial_cleanup;
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}
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if (hardware[type].send_pulse && hardware[type].send_space)
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rcdev->tx_ir = serial_ir_tx;
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if (hardware[type].set_send_carrier)
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rcdev->s_tx_carrier = serial_ir_tx_carrier;
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if (hardware[type].set_duty_cycle)
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rcdev->s_tx_duty_cycle = serial_ir_tx_duty_cycle;
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switch (type) {
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case IR_HOMEBREW:
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rcdev->input_name = "Serial IR type home-brew";
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break;
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case IR_IRDEO:
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rcdev->input_name = "Serial IR type IRdeo";
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break;
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case IR_IRDEO_REMOTE:
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rcdev->input_name = "Serial IR type IRdeo remote";
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break;
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case IR_ANIMAX:
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rcdev->input_name = "Serial IR type AnimaX";
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break;
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case IR_IGOR:
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rcdev->input_name = "Serial IR type IgorPlug";
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break;
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}
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rcdev->input_phys = KBUILD_MODNAME "/input0";
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rcdev->input_id.bustype = BUS_HOST;
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rcdev->input_id.vendor = 0x0001;
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rcdev->input_id.product = 0x0001;
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rcdev->input_id.version = 0x0100;
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rcdev->open = serial_ir_open;
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rcdev->close = serial_ir_close;
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rcdev->dev.parent = &serial_ir.pdev->dev;
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rcdev->allowed_protocols = RC_BIT_ALL_IR_DECODER;
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rcdev->driver_name = KBUILD_MODNAME;
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rcdev->map_name = RC_MAP_RC6_MCE;
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rcdev->min_timeout = 1;
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rcdev->timeout = IR_DEFAULT_TIMEOUT;
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rcdev->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
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rcdev->rx_resolution = 250000;
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serial_ir.rcdev = rcdev;
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result = rc_register_device(rcdev);
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if (!result)
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return 0;
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serial_cleanup:
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serial_ir_exit();
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return result;
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}
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@ -818,7 +820,6 @@ static int __init serial_ir_init_module(void)
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static void __exit serial_ir_exit_module(void)
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{
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del_timer_sync(&serial_ir.timeout_timer);
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rc_unregister_device(serial_ir.rcdev);
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serial_ir_exit();
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}
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