/* * 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 vate-remove'/>
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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-03 17:10:28 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-08 23:36:29 +1100
commitd7df2443cd5f67fc6ee7c05a88e4996e8177f91b (patch)
tree098a7c0ca4fceb8a65cb1f693c9d71990388933d /sound/soc/bcm/bcm2835-i2s.c
parenta0615a16f7d0ceb5804d295203c302d496d8ee91 (diff)
powerpc/mm: Fix spurrious segfaults on radix with autonuma
When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it clears all the protection bits but leave the PTE valid. With the Radix MMU, an attempt at executing from such a PTE will take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G". It is thus incorrect to treat all such faults as errors. We should pass them to handle_mm_fault() for autonuma to deal with. The case of pages that are really not executable is handled by the existing test for VM_EXEC further down. That leaves us with catching the kernel attempts at executing user pages. We can catch that earlier, even before we do find_vma. It is never valid on powerpc for the kernel to take an exec fault to begin with. So fold that test with the existing test for the kernel faulting on kernel addresses to bail out early. Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report") Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'sound/soc/bcm/bcm2835-i2s.c')