/* * Copyright (c) by Lee Revell * Clemens Ladisch * Routines for control of EMU10K1 chips * * BUGS: * -- * * TODO: * -- * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include static int snd_emu10k1_timer_start(struct snd_timer *timer) { struct snd_emu10k1 *emu; unsigned long flags; unsigned int delay; emu = snd_timer_chip(timer); delay = timer->sticks - 1; if (delay < 5 ) /* minimum time is 5 ticks */ delay = 5; spin_lock_irqsave(&emu->reg_lock, flags); snd_emu10k1_intr_enable(emu, INTE_INTERVALTIMERENB); outw(delay & TIMER_RATE_MASK, emu->port + TIMER); spin_unlock_irqrestore(&emu->reg_lock, flags); return 0; } static int snd_emu10k1_timer_stop(struct snd_timer *timer) { struct snd_emu10k1 *emu; unsigned long flags; emu = snd_timer_chip(timer); spin_lock_irqsave(&emu->reg_lock, flags); snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB); spin_unlock_irqrestore(&emu->reg_lock, flags); return 0; } static int snd_emu10k1_timer_precise_resolution(struct snd_timer *timer, unsigned long *num, unsigned long *den) { *num = 1; *den = 48000; return 0; } static struct snd_timer_hardware snd_emu10k1_timer_hw = { .flags = SNDRV_TIMER_HW_AUTO, .resolution = 20833, /* 1 sample @ 48KHZ = 20.833...us */ .ticks = 1024, .start = snd_emu10k1_timer_start, .stop = snd_emu10k1_timer_stop, .precise_resolution = snd_emu10k1_timer_precise_resolution, }; int snd_emu10k1_timer(struct snd_emu10k1 *emu, int device) { struct snd_timer *timer = NULL; struct snd_timer_id tid; int err; tid.dev_class = SNDRV_TIMER_CLASS_CARD; tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; tid.card = emu->card->number; tid.device = device; tid.subdevice = 0; if ((err = snd_timer_new(emu->card, "EMU10K1", &tid, &timer)) >= 0) { strcpy(timer->name, "EMU10K1 timer"); timer->private_data = emu; timer->hw = snd_emu10k1_timer_hw; } emu->timer = timer; return err; } /cgit.cgi/linux/net-next.git/commit/?id=dfef358bd1beb4e7b5c94eca944be9cd23dfc752'>root/sound/soc/codecs/ab8500-codec.c
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /sound/soc/codecs/ab8500-codec.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'sound/soc/codecs/ab8500-codec.c')