/* * fireworks_midi.c - a part of driver for Fireworks based devices * * Copyright (c) 2009-2010 Clemens Ladisch * Copyright (c) 2013-2014 Takashi Sakamoto * * Licensed under the terms of the GNU General Public License, version 2. */ #include "fireworks.h" static int midi_capture_open(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; int err; err = snd_efw_stream_lock_try(efw); if (err < 0) goto end; mutex_lock(&efw->mutex); efw->capture_substreams++; err = snd_efw_stream_start_duplex(efw, 0); mutex_unlock(&efw->mutex); if (err < 0) snd_efw_stream_lock_release(efw); end: return err; } static int midi_playback_open(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; int err; err = snd_efw_stream_lock_try(efw); if (err < 0) goto end; mutex_lock(&efw->mutex); efw->playback_substreams++; err = snd_efw_stream_start_duplex(efw, 0); mutex_unlock(&efw->mutex); if (err < 0) snd_efw_stream_lock_release(efw); end: return err; } static int midi_capture_close(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; mutex_lock(&efw->mutex); efw->capture_substreams--; snd_efw_stream_stop_duplex(efw); mutex_unlock(&efw->mutex); snd_efw_stream_lock_release(efw); return 0; } static int midi_playback_close(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; mutex_lock(&efw->mutex); efw->playback_substreams--; snd_efw_stream_stop_duplex(efw); mutex_unlock(&efw->mutex); snd_efw_stream_lock_release(efw); return 0; } static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) { struct snd_efw *efw = substrm->rmidi->private_data; unsigned long flags; spin_lock_irqsave(&efw->lock, flags); if (up) amdtp_am824_midi_trigger(&efw->tx_stream, substrm->number, substrm); else amdtp_am824_midi_trigger(&efw->tx_stream, substrm->number, NULL); spin_unlock_irqrestore(&efw->lock, flags); } static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) { struct snd_efw *efw = substrm->rmidi->private_data; unsigned long flags; spin_lock_irqsave(&efw->lock, flags); if (up) amdtp_am824_midi_trigger(&efw->rx_stream, substrm->number, substrm); else amdtp_am824_midi_trigger(&efw->rx_stream, substrm->number, NULL); spin_unlock_irqrestore(&efw->lock, flags); } static struct snd_rawmidi_ops midi_capture_ops = { .open = midi_capture_open, .close = midi_capture_close, .trigger = midi_capture_trigger, }; static struct snd_rawmidi_ops midi_playback_ops = { .open = midi_playback_open, .close = midi_playback_close, .trigger = midi_playback_trigger, }; static void set_midi_substream_names(struct snd_efw *efw, struct snd_rawmidi_str *str) { struct snd_rawmidi_substream *subs; list_for_each_entry(subs, &str->substreams, list) { snprintf(subs->name, sizeof(subs->name), "%s MIDI %d", efw->card->shortname, subs->number + 1); } } int snd_efw_create_midi_devices(struct snd_efw *efw) { struct snd_rawmidi *rmidi; struct snd_rawmidi_str *str; int err; /* create midi ports */ err = snd_rawmidi_new(efw->card, efw->card->driver, 0, efw->midi_out_ports, efw->midi_in_ports, &rmidi); if (err < 0) return err; snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", efw->card->shortname); rmidi->private_data = efw; if (efw->midi_in_ports > 0) { rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &midi_capture_ops); str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; set_midi_substream_names(efw, str); } if (efw->midi_out_ports > 0) { rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &midi_playback_ops); str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; set_midi_substream_names(efw, str); } if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0)) rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; return 0; } tion>space:mode:
Diffstat (limited to 'include/crypto/b128ops.h')
mmit/fs?id=2aa6ba7b5ad3189cc27f14540aa2f57f0ed8df4b'>2aa6ba7b5ad3189cc27f14540aa2f57f0ed8df4b (diff)
xfs: fix bmv_count confusion w/ shared extents
In a bmapx call, bmv_count is the total size of the array, including the zeroth element that userspace uses to supply the search key. The output array starts at offset 1 so that we can set up the user for the next invocation. Since we now can split an extent into multiple bmap records due to shared/unshared status, we have to be careful that we don't overflow the output array. In the original patch f86f403794b ("xfs: teach get_bmapx about shared extents and the CoW fork") I used cur_ext (the output index) to check for overflows, albeit with an off-by-one error. Since nexleft no longer describes the number of unfilled slots in the output, we can rip all that out and use cur_ext for the overflow check directly. Failure to do this causes heap corruption in bmapx callers such as xfs_io and xfs_scrub. xfs/328 can reproduce this problem. Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs')