55cc11bc43
Changes in 4.9.143 mm/huge_memory: rename freeze_page() to unmap_page() mm/huge_memory.c: reorder operations in __split_huge_page_tail() mm/huge_memory: splitting set mapping+index before unfreeze mm/huge_memory: fix lockdep complaint on 32-bit i_size_read() mm/khugepaged: collapse_shmem() stop if punched or truncated shmem: shmem_charge: verify max_block is not exceeded before inode update shmem: introduce shmem_inode_acct_block mm/khugepaged: fix crashes due to misaccounted holes mm/khugepaged: collapse_shmem() remember to clear holes mm/khugepaged: minor reorderings in collapse_shmem() mm/khugepaged: collapse_shmem() without freezing new_page mm/khugepaged: collapse_shmem() do not crash on Compound media: em28xx: Fix use-after-free when disconnecting Revert "wlcore: Add missing PM call for wlcore_cmd_wait_for_event_or_timeout()" net: skb_scrub_packet(): Scrub offload_fwd_mark rapidio/rionet: do not free skb before reading its length s390/qeth: fix length check in SNMP processing usbnet: ipheth: fix potential recvmsg bug and recvmsg bug 2 kvm: mmu: Fix race in emulated page table writes kvm: svm: Ensure an IBPB on all affected CPUs when freeing a vmcb KVM: X86: Fix scan ioapic use-before-initialization xtensa: enable coprocessors that are being flushed xtensa: fix coprocessor context offset definitions Btrfs: ensure path name is null terminated at btrfs_control_ioctl perf/x86/intel: Move branch tracing setup to the Intel-specific source file perf/x86/intel: Add generic branch tracing check to intel_pmu_has_bts() fs: fix lost error code in dio_complete ALSA: wss: Fix invalid snd_free_pages() at error path ALSA: ac97: Fix incorrect bit shift at AC97-SPSA control write ALSA: control: Fix race between adding and removing a user element ALSA: sparc: Fix invalid snd_free_pages() at error path ext2: fix potential use after free dmaengine: at_hdmac: fix memory leak in at_dma_xlate() dmaengine: at_hdmac: fix module unloading btrfs: release metadata before running delayed refs USB: usb-storage: Add new IDs to ums-realtek usb: core: quirks: add RESET_RESUME quirk for Cherry G230 Stream series Revert "usb: dwc3: gadget: skip Set/Clear Halt when invalid" iio:st_magn: Fix enable device after trigger mm: use swp_offset as key in shmem_replace_page() Drivers: hv: vmbus: check the creation_status in vmbus_establish_gpadl() misc: mic/scif: fix copy-paste error in scif_create_remote_lookup efi/libstub: arm: support building with clang ARM: 8766/1: drop no-thumb-interwork in EABI mode ARM: 8767/1: add support for building ARM kernel with clang bus: arm-cci: remove unnecessary unreachable() ARM: trusted_foundations: do not use naked function workqueue: avoid clang warning efi/libstub: Make file I/O chunking x86-specific kbuild: Set KBUILD_CFLAGS before incl. arch Makefile Linux 4.9.143 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/*
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* STMicroelectronics magnetometers driver
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*
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* Copyright 2012-2013 STMicroelectronics Inc.
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*
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* Denis Ciocca <denis.ciocca@st.com>
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*
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* Licensed under the GPL-2.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/stat.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/delay.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/common/st_sensors.h>
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#include "st_magn.h"
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int st_magn_trig_set_state(struct iio_trigger *trig, bool state)
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{
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struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
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return st_sensors_set_dataready_irq(indio_dev, state);
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}
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static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
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{
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int err;
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struct st_sensor_data *mdata = iio_priv(indio_dev);
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mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
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if (mdata->buffer_data == NULL) {
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err = -ENOMEM;
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goto allocate_memory_error;
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}
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err = iio_triggered_buffer_postenable(indio_dev);
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if (err < 0)
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goto st_magn_buffer_postenable_error;
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return st_sensors_set_enable(indio_dev, true);
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st_magn_buffer_postenable_error:
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kfree(mdata->buffer_data);
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allocate_memory_error:
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return err;
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}
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static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
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{
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int err;
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struct st_sensor_data *mdata = iio_priv(indio_dev);
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err = st_sensors_set_enable(indio_dev, false);
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if (err < 0)
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goto st_magn_buffer_predisable_error;
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err = iio_triggered_buffer_predisable(indio_dev);
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st_magn_buffer_predisable_error:
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kfree(mdata->buffer_data);
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return err;
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}
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static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
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.postenable = &st_magn_buffer_postenable,
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.predisable = &st_magn_buffer_predisable,
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};
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int st_magn_allocate_ring(struct iio_dev *indio_dev)
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{
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return iio_triggered_buffer_setup(indio_dev, NULL,
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&st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
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}
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void st_magn_deallocate_ring(struct iio_dev *indio_dev)
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{
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iio_triggered_buffer_cleanup(indio_dev);
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}
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer");
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MODULE_LICENSE("GPL v2");
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