/* * Freescale QUICC Engine USB Host Controller Driver * * Copyright (c) Freescale Semicondutor, Inc. 2006. * Shlomi Gridish * Jerry Huang * Copyright (c) Logic Product Development, Inc. 2007 * Peter Barada * Copyright (c) MontaVista Software, Inc. 2008. * Anton Vorontsov * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include #include #include #include #include #include #include #include "fhci.h" static void init_td(struct td *td) { memset(td, 0, sizeof(*td)); INIT_LIST_HEAD(&td->node); INIT_LIST_HEAD(&td->frame_lh); } static void init_ed(struct ed *ed) { memset(ed, 0, sizeof(*ed)); INIT_LIST_HEAD(&ed->td_list); INIT_LIST_HEAD(&ed->node); } static struct td *get_empty_td(struct fhci_hcd *fhci) { struct td *td; if (!list_empty(&fhci->empty_tds)) { td = list_entry(fhci->empty_tds.next, struct td, node); list_del(fhci->empty_tds.next); } else { td = kmalloc(sizeof(*td), GFP_ATOMIC); if (!td) fhci_err(fhci, "No memory to allocate to TD\n"); else init_td(td); } return td; } void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td) { init_td(td); list_add(&td->node, &fhci->empty_tds); } struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci) { struct ed *ed; if (!list_empty(&fhci->empty_eds)) { ed = list_entry(fhci->empty_eds.next, struct ed, node); list_del(fhci->empty_eds.next); } else { ed = kmalloc(sizeof(*ed), GFP_ATOMIC); if (!ed) fhci_err(fhci, "No memory to allocate to ED\n"); else init_ed(ed); } return ed; } void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed) { init_ed(ed); list_add(&ed->node, &fhci->empty_eds); } struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb, struct urb_priv *urb_priv, struct ed *ed, u16 index, enum fhci_ta_type type, int toggle, u8 *data, u32 len, u16 interval, u16 start_frame, bool ioc) { struct td *td = get_empty_td(fhci); if (!td) return NULL; td->urb = urb; td->ed = ed; td->type = type; td->toggle = toggle; td->data = data; td->len = len; td->iso_index = index; td->interval = interval; td->start_frame = start_frame; td->ioc = ioc; td->status = USB_TD_OK; urb_priv->tds[index] = td; return td; } >
path: root/sound/soc/codecs/es8328-i2c.c
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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 /sound/soc/codecs/es8328-i2c.c
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 'sound/soc/codecs/es8328-i2c.c')