forked from Minki/linux
5554b35933
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (24 commits)
I/OAT: I/OAT version 3.0 support
I/OAT: tcp_dma_copybreak default value dependent on I/OAT version
I/OAT: Add watchdog/reset functionality to ioatdma
iop_adma: cleanup iop_chan_xor_slot_count
iop_adma: document how to calculate the minimum descriptor pool size
iop_adma: directly reclaim descriptors on allocation failure
async_tx: make async_tx_test_ack a boolean routine
async_tx: remove depend_tx from async_tx_sync_epilog
async_tx: export async_tx_quiesce
async_tx: fix handling of the "out of descriptor" condition in async_xor
async_tx: ensure the xor destination buffer remains dma-mapped
async_tx: list_for_each_entry_rcu() cleanup
dmaengine: Driver for the Synopsys DesignWare DMA controller
dmaengine: Add slave DMA interface
dmaengine: add DMA_COMPL_SKIP_{SRC,DEST}_UNMAP flags to control dma unmap
dmaengine: Add dma_client parameter to device_alloc_chan_resources
dmatest: Simple DMA memcpy test client
dmaengine: DMA engine driver for Marvell XOR engine
iop-adma: fix platform driver hotplug/coldplug
dmaengine: track the number of clients using a channel
...
Fixed up conflict in drivers/dca/dca-sysfs.c manually
91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/device.h>
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#include <linux/idr.h>
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#include <linux/kdev_t.h>
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#include <linux/err.h>
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#include <linux/dca.h>
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static struct class *dca_class;
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static struct idr dca_idr;
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static spinlock_t dca_idr_lock;
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int dca_sysfs_add_req(struct dca_provider *dca, struct device *dev, int slot)
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{
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struct device *cd;
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static int req_count;
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cd = device_create_drvdata(dca_class, dca->cd,
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MKDEV(0, slot + 1), NULL,
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"requester%d", req_count++);
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if (IS_ERR(cd))
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return PTR_ERR(cd);
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return 0;
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}
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void dca_sysfs_remove_req(struct dca_provider *dca, int slot)
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{
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device_destroy(dca_class, MKDEV(0, slot + 1));
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}
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int dca_sysfs_add_provider(struct dca_provider *dca, struct device *dev)
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{
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struct device *cd;
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int err = 0;
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idr_try_again:
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if (!idr_pre_get(&dca_idr, GFP_KERNEL))
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return -ENOMEM;
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spin_lock(&dca_idr_lock);
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err = idr_get_new(&dca_idr, dca, &dca->id);
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spin_unlock(&dca_idr_lock);
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switch (err) {
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case 0:
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break;
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case -EAGAIN:
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goto idr_try_again;
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default:
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return err;
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}
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cd = device_create_drvdata(dca_class, dev, MKDEV(0, 0), NULL,
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"dca%d", dca->id);
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if (IS_ERR(cd)) {
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spin_lock(&dca_idr_lock);
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idr_remove(&dca_idr, dca->id);
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spin_unlock(&dca_idr_lock);
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return PTR_ERR(cd);
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}
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dca->cd = cd;
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return 0;
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}
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void dca_sysfs_remove_provider(struct dca_provider *dca)
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{
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device_unregister(dca->cd);
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dca->cd = NULL;
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spin_lock(&dca_idr_lock);
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idr_remove(&dca_idr, dca->id);
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spin_unlock(&dca_idr_lock);
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}
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int __init dca_sysfs_init(void)
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{
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idr_init(&dca_idr);
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spin_lock_init(&dca_idr_lock);
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dca_class = class_create(THIS_MODULE, "dca");
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if (IS_ERR(dca_class)) {
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idr_destroy(&dca_idr);
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return PTR_ERR(dca_class);
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}
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return 0;
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}
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void __exit dca_sysfs_exit(void)
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{
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class_destroy(dca_class);
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idr_destroy(&dca_idr);
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}
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