From 990862a2f024296f27460306393de8f0cdab8997 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 10 Jan 2012 09:48:50 -0200 Subject: [media] cx231xx: fix device disconnect checks The driver were using DEV_MISCONFIGURED on some places, and DEV_DISCONNECTED on others. In a matter of fact, DEV_MISCONFIGURED were set only during the usb disconnect callback, with was confusing. Also, the alsa driver never checks if the device is present, before doing some dangerous things. Remove DEV_MISCONFIGURED, replacing it by DEV_DISCONNECTED. Also, fixes the other usecases for DEV_DISCONNECTED. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx231xx/cx231xx-audio.c | 20 ++++++++++++++++++++ drivers/media/video/cx231xx/cx231xx-cards.c | 5 ++--- drivers/media/video/cx231xx/cx231xx-dvb.c | 4 ++-- drivers/media/video/cx231xx/cx231xx-vbi.c | 2 +- drivers/media/video/cx231xx/cx231xx-video.c | 14 ++++---------- drivers/media/video/cx231xx/cx231xx.h | 1 - 6 files changed, 29 insertions(+), 17 deletions(-) (limited to 'drivers') diff --git a/drivers/media/video/cx231xx/cx231xx-audio.c b/drivers/media/video/cx231xx/cx231xx-audio.c index 30d13c15739a..e5742a0e19a0 100644 --- a/drivers/media/video/cx231xx/cx231xx-audio.c +++ b/drivers/media/video/cx231xx/cx231xx-audio.c @@ -111,6 +111,9 @@ static void cx231xx_audio_isocirq(struct urb *urb) struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; + if (dev->state & DEV_DISCONNECTED) + return; + switch (urb->status) { case 0: /* success */ case -ETIMEDOUT: /* NAK */ @@ -196,6 +199,9 @@ static void cx231xx_audio_bulkirq(struct urb *urb) struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; + if (dev->state & DEV_DISCONNECTED) + return; + switch (urb->status) { case 0: /* success */ case -ETIMEDOUT: /* NAK */ @@ -273,6 +279,9 @@ static int cx231xx_init_audio_isoc(struct cx231xx *dev) cx231xx_info("%s: Starting ISO AUDIO transfers\n", __func__); + if (dev->state & DEV_DISCONNECTED) + return -ENODEV; + sb_size = CX231XX_ISO_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { @@ -331,6 +340,9 @@ static int cx231xx_init_audio_bulk(struct cx231xx *dev) cx231xx_info("%s: Starting BULK AUDIO transfers\n", __func__); + if (dev->state & DEV_DISCONNECTED) + return -ENODEV; + sb_size = CX231XX_NUM_AUDIO_PACKETS * dev->adev.max_pkt_size; for (i = 0; i < CX231XX_AUDIO_BUFS; i++) { @@ -432,6 +444,11 @@ static int snd_cx231xx_capture_open(struct snd_pcm_substream *substream) return -ENODEV; } + if (dev->state & DEV_DISCONNECTED) { + cx231xx_errdev("Can't open. the device was removed.\n"); + return -ENODEV; + } + /* Sets volume, mute, etc */ dev->mute = 0; @@ -571,6 +588,9 @@ static int snd_cx231xx_capture_trigger(struct snd_pcm_substream *substream, struct cx231xx *dev = snd_pcm_substream_chip(substream); int retval; + if (dev->state & DEV_DISCONNECTED) + return -ENODEV; + spin_lock(&dev->adev.slock); switch (cmd) { case SNDRV_PCM_TRIGGER_START: diff --git a/drivers/media/video/cx231xx/cx231xx-cards.c b/drivers/media/video/cx231xx/cx231xx-cards.c index 1f2fbbfebc76..7577e6e50136 100644 --- a/drivers/media/video/cx231xx/cx231xx-cards.c +++ b/drivers/media/video/cx231xx/cx231xx-cards.c @@ -1337,6 +1337,8 @@ static void cx231xx_usb_disconnect(struct usb_interface *interface) if (!dev->udev) return; + dev->state |= DEV_DISCONNECTED; + flush_request_modules(dev); /* wait until all current v4l2 io is finished then deallocate @@ -1354,16 +1356,13 @@ static void cx231xx_usb_disconnect(struct usb_interface *interface) /* Even having users, it is safe to remove the RC i2c driver */ cx231xx_ir_exit(dev); - dev->state |= DEV_MISCONFIGURED; if (dev->USE_ISO) cx231xx_uninit_isoc(dev); else cx231xx_uninit_bulk(dev); - dev->state |= DEV_DISCONNECTED; wake_up_interruptible(&dev->wait_frame); wake_up_interruptible(&dev->wait_stream); } else { - dev->state |= DEV_DISCONNECTED; } cx231xx_close_extension(dev); diff --git a/drivers/media/video/cx231xx/cx231xx-dvb.c b/drivers/media/video/cx231xx/cx231xx-dvb.c index da9a4a0aab79..7c4e360ba9bc 100644 --- a/drivers/media/video/cx231xx/cx231xx-dvb.c +++ b/drivers/media/video/cx231xx/cx231xx-dvb.c @@ -196,7 +196,7 @@ static inline int dvb_isoc_copy(struct cx231xx *dev, struct urb *urb) if (!dev) return 0; - if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) + if (dev->state & DEV_DISCONNECTED) return 0; if (urb->status < 0) { @@ -228,7 +228,7 @@ static inline int dvb_bulk_copy(struct cx231xx *dev, struct urb *urb) if (!dev) return 0; - if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) + if (dev->state & DEV_DISCONNECTED) return 0; if (urb->status < 0) { diff --git a/drivers/media/video/cx231xx/cx231xx-vbi.c b/drivers/media/video/cx231xx/cx231xx-vbi.c index 1c7a4daafecf..9c5967e1d0c6 100644 --- a/drivers/media/video/cx231xx/cx231xx-vbi.c +++ b/drivers/media/video/cx231xx/cx231xx-vbi.c @@ -93,7 +93,7 @@ static inline int cx231xx_isoc_vbi_copy(struct cx231xx *dev, struct urb *urb) if (!dev) return 0; - if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) + if (dev->state & DEV_DISCONNECTED) return 0; if (urb->status < 0) { diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c index 6e81f970dc7d..829a41b0c9ef 100644 --- a/drivers/media/video/cx231xx/cx231xx-video.c +++ b/drivers/media/video/cx231xx/cx231xx-video.c @@ -337,7 +337,7 @@ static inline int cx231xx_isoc_copy(struct cx231xx *dev, struct urb *urb) if (!dev) return 0; - if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) + if (dev->state & DEV_DISCONNECTED) return 0; if (urb->status < 0) { @@ -440,7 +440,7 @@ static inline int cx231xx_bulk_copy(struct cx231xx *dev, struct urb *urb) if (!dev) return 0; - if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED)) + if (dev->state & DEV_DISCONNECTED) return 0; if (urb->status < 0) { @@ -1000,12 +1000,6 @@ static int check_dev(struct cx231xx *dev) cx231xx_errdev("v4l2 ioctl: device not present\n"); return -ENODEV; } - - if (dev->state & DEV_MISCONFIGURED) { - cx231xx_errdev("v4l2 ioctl: device is misconfigured; " - "close and open it again\n"); - return -EIO; - } return 0; } @@ -2347,7 +2341,8 @@ static int cx231xx_v4l2_close(struct file *filp) return 0; } - if (dev->users == 1) { + dev->users--; + if (!dev->users) { videobuf_stop(&fh->vb_vidq); videobuf_mmap_free(&fh->vb_vidq); @@ -2374,7 +2369,6 @@ static int cx231xx_v4l2_close(struct file *filp) cx231xx_set_alt_setting(dev, INDEX_VIDEO, 0); } kfree(fh); - dev->users--; wake_up_interruptible_nr(&dev->open, 1); return 0; } diff --git a/drivers/media/video/cx231xx/cx231xx.h b/drivers/media/video/cx231xx/cx231xx.h index 5d498a4112d7..e17447554a0d 100644 --- a/drivers/media/video/cx231xx/cx231xx.h +++ b/drivers/media/video/cx231xx/cx231xx.h @@ -377,7 +377,6 @@ struct cx231xx_board { enum cx231xx_dev_state { DEV_INITIALIZED = 0x01, DEV_DISCONNECTED = 0x02, - DEV_MISCONFIGURED = 0x04, }; enum AFE_MODE { -- cgit v1.2.3