/* * Load Analog Devices SigmaStudio firmware files * * Copyright 2009-2011 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ #include #include #include #include #include #include "sigmadsp.h" static int sigmadsp_write_i2c(void *control_data, unsigned int addr, const uint8_t data[], size_t len) { uint8_t *buf; int ret; buf = kzalloc(2 + len, GFP_KERNEL | GFP_DMA); if (!buf) return -ENOMEM; put_unaligned_be16(addr, buf); memcpy(buf + 2, data, len); ret = i2c_master_send(control_data, buf, len + 2); kfree(buf); if (ret < 0) return ret; return 0; } static int sigmadsp_read_i2c(void *control_data, unsigned int addr, uint8_t data[], size_t len) { struct i2c_client *client = control_data; struct i2c_msg msgs[2]; uint8_t buf[2]; int ret; put_unaligned_be16(addr, buf); msgs[0].addr = client->addr; msgs[0].len = sizeof(buf); msgs[0].buf = buf; msgs[0].flags = 0; msgs[1].addr = client->addr; msgs[1].len = len; msgs[1].buf = data; msgs[1].flags = I2C_M_RD; ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); if (ret < 0) return ret; else if (ret != ARRAY_SIZE(msgs)) return -EIO; return 0; } /** * devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance * @client: The parent I2C device * @ops: The sigmadsp_ops to use for this instance * @firmware_name: Name of the firmware file to load * * Allocates a SigmaDSP instance and loads the specified firmware file. * * Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error. */ struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client, const struct sigmadsp_ops *ops, const char *firmware_name) { struct sigmadsp *sigmadsp; sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name); if (IS_ERR(sigmadsp)) return sigmadsp; sigmadsp->control_data = client; sigmadsp->write = sigmadsp_write_i2c; sigmadsp->read = sigmadsp_read_i2c; return sigmadsp; } EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c); MODULE_AUTHOR("Lars-Peter Clausen "); MODULE_DESCRIPTION("SigmaDSP I2C firmware loader"); MODULE_LICENSE("GPL"); xt.git/log/include/crypto/xts.h'>
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /include/crypto/xts.h
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/crypto/xts.h')