/* * bf6xx_sport - Analog Devices BF6XX SPORT driver * * Copyright (c) 2012 Analog Devices Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _BF6XX_SPORT_H_ #define _BF6XX_SPORT_H_ #include #include struct sport_device { struct platform_device *pdev; const unsigned short *pin_req; struct sport_register *tx_regs; struct sport_register *rx_regs; int tx_dma_chan; int rx_dma_chan; int tx_err_irq; int rx_err_irq; void (*tx_callback)(void *data); void *tx_data; void (*rx_callback)(void *data); void *rx_data; struct dmasg *tx_desc; struct dmasg *rx_desc; unsigned int tx_desc_size; unsigned int rx_desc_size; unsigned char *tx_buf; unsigned char *rx_buf; unsigned int tx_fragsize; unsigned int rx_fragsize; unsigned int tx_frags; unsigned int rx_frags; unsigned int wdsize; }; struct sport_params { u32 spctl; u32 div; }; struct sport_device *sport_create(struct platform_device *pdev); void sport_delete(struct sport_device *sport); int sport_set_tx_params(struct sport_device *sport, struct sport_params *params); int sport_set_rx_params(struct sport_device *sport, struct sport_params *params); void sport_tx_start(struct sport_device *sport); void sport_rx_start(struct sport_device *sport); void sport_tx_stop(struct sport_device *sport); void sport_rx_stop(struct sport_device *sport); void sport_set_tx_callback(struct sport_device *sport, void (*tx_callback)(void *), void *tx_data); void sport_set_rx_callback(struct sport_device *sport, void (*rx_callback)(void *), void *rx_data); int sport_config_tx_dma(struct sport_device *sport, void *buf, int fragcount, size_t fragsize); int sport_config_rx_dma(struct sport_device *sport, void *buf, int fragcount, size_t fragsize); unsigned long sport_curr_offset_tx(struct sport_device *sport); unsigned long sport_curr_offset_rx(struct sport_device *sport); #endif size='10' name='q' value=''/>
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authorAndrei Vagin <avagin@openvz.org>2017-01-04 19:28:14 -0800
committerEric W. Biederman <ebiederm@xmission.com>2017-01-10 13:34:56 +1300
commitadd7c65ca426b7a37184dd3d2172394e23d585d6 (patch)
tree28b08b519540041b06ed0ab0b1c005076b932e8e /sound/pci/asihpi
parent75422726b0f717d67db3283c2eb5bc14fa2619c5 (diff)
pid: fix lockdep deadlock warning due to ucount_lock
========================================================= [ INFO: possible irq lock inversion dependency detected ] 4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G W --------------------------------------------------------- swapper/1/0 just changed the state of lock: (&(&sighand->siglock)->rlock){-.....}, at: [<ffffffffbd0a1bc6>] __lock_task_sighand+0xb6/0x2c0 but this lock took another, HARDIRQ-unsafe lock in the past: (ucounts_lock){+.+...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&sighand->siglock)->rlock --> &(&tty->ctrl_lock)->rlock --> ucounts_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ucounts_lock); local_irq_disable(); lock(&(&sighand->siglock)->rlock); lock(&(&tty->ctrl_lock)->rlock); <Interrupt> lock(&(&sighand->siglock)->rlock); *** DEADLOCK *** This patch removes a dependency between rlock and ucount_lock. Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces") Cc: stable@vger.kernel.org Signed-off-by: Andrei Vagin <avagin@openvz.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'sound/pci/asihpi')