• Alexey Klimov's avatar
    [media] radio-mr800: move clamp_t check inside amradio_set_freq() · 4b0cac5e
    Alexey Klimov authored
    If i run verbose v4l2-compliance with my radio-mr800 device few times
    then i get warning about frequency out of range:
    
    root@machine:~# v4l2-compliance -r /dev/radio0 -v 2
    is radio
    Driver Info:
    	Driver name   : radio-mr800
    	Card type     : AverMedia MR 800 USB FM Radio
    	Bus info      : usb-0000:00:1a.0-1.2
    	Driver version: 3.9.0
    	Capabilities  : 0x80050400
    		Tuner
    		Radio
    		Device Capabilities
    	Device Caps   : 0x00050400
    		Tuner
    		Radio
    Compliance test for device /dev/radio0 (not using libv4l2):
    Required ioctls:
    	test VIDIOC_QUERYCAP: OK
    Allow for multiple opens:
    	test second radio open: OK
    	test VIDIOC_QUERYCAP: OK
    	test VIDIOC_G/S_PRIORITY: OK
    Debug ioctls:
    	test VIDIOC_DBG_G_CHIP_IDENT: OK (Not Supported)
    	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
    	test VIDIOC_LOG_STATUS: OK
    Input ioctls:
    	test VIDIOC_G/S_TUNER: OK
    		warn: v4l2-test-input-output.cpp(234): returned tuner 0 frequency out
    of range (6550200 not in [1400000...1728000])
    	test VIDIOC_G/S_FREQUENCY: OK
    	test VIDIOC_S_HW_FREQ_SEEK: OK
    	test VIDIOC_ENUMAUDIO: OK (Not Supported)
    	test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
    	test VIDIOC_G/S_AUDIO: OK (Not Supported)
    	Inputs: 0 Audio Inputs: 0 Tuners: 1
    Output ioctls:
    	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
    	test VIDIOC_G/S_FREQUENCY: OK
    	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
    	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
    	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
    	Outputs: 0 Audio Outputs: 0 Modulators: 0
    Control ioctls:
    		info: checking v4l2_queryctrl of control 'User Controls' (0x00980001)
    		info: checking v4l2_queryctrl of control 'Mute' (0x00980909)
    		info: checking v4l2_queryctrl of control 'Mute' (0x00980909)
    	test VIDIOC_QUERYCTRL/MENU: OK
    		info: checking control 'User Controls' (0x00980001)
    		info: checking control 'Mute' (0x00980909)
    	test VIDIOC_G/S_CTRL: OK
    		info: checking extended control 'User Controls' (0x00980001)
    		info: checking extended control 'Mute' (0x00980909)
    	test VIDIOC_G/S/TRY_EXT_CTRLS: OK
    		info: checking control event 'User Controls' (0x00980001)
    		info: checking control event 'Mute' (0x00980909)
    	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
    	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
    	Standard Controls: 2 Private Controls: 0
    Input/Output configuration ioctls:
    	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
    	test VIDIOC_ENUM/G/S/QUERY_DV_PRESETS: OK (Not Supported)
    	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
    	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
    Format ioctls:
    	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK (Not Supported)
    	test VIDIOC_G/S_PARM: OK (Not Supported)
    	test VIDIOC_G_FBUF: OK (Not Supported)
    	test VIDIOC_G_FMT: OK (Not Supported)
    	test VIDIOC_TRY_FMT: OK (Not Supported)
    	test VIDIOC_S_FMT: OK (Not Supported)
    	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
    Codec ioctls:
    	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
    	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
    	test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
    Buffer ioctls:
    	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK (Not Supported)
    Total: 38, Succeeded: 38, Failed: 0, Warnings: 1
    
    Some printk() debugging showed that vidioc_s_hw_freq_seek() setups
    radio->curfreq to out of range value (lines 395-396) and calls
    amradio_set_freq() to set this frequency on device without any
    out-of-range checks.
    
    Patch protects from setting up frequency on device to incorrect value
    moving clamp_t check inside amradio_set_freq. With this patch we can
    call amradio_set_freq() with out of range frequency from any place.
    Also put comment that sometimes radio->curfreq is set to out of range
    value in vidioc_s_hw_freq_seek().
    Signed-off-by: default avatarAlexey Klimov <klimov.linux@gmail.com>
    Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
    4b0cac5e
radio-mr800.c 17.2 KB