/* * Wire Adapter Host Controller Driver * Common items to HWA and DWA based HCDs * * Copyright (C) 2005-2006 Intel Corporation * Inaky Perez-Gonzalez * * 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., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. * * * FIXME: docs */ #include #include #include "wusbhc.h" #include "wa-hc.h" /** * Assumes * * wa->usb_dev and wa->usb_iface initialized and refcounted, * wa->wa_descr initialized. */ int wa_create(struct wahc *wa, struct usb_interface *iface, kernel_ulong_t quirks) { int result; struct device *dev = &iface->dev; result = wa_rpipes_create(wa); if (result < 0) goto error_rpipes_create; wa->quirks = quirks; /* Fill up Data Transfer EP pointers */ wa->dti_epd = &iface->cur_altsetting->endpoint[1].desc; wa->dto_epd = &iface->cur_altsetting->endpoint[2].desc; wa->dti_buf_size = usb_endpoint_maxp(wa->dti_epd); wa->dti_buf = kmalloc(wa->dti_buf_size, GFP_KERNEL); if (wa->dti_buf == NULL) { result = -ENOMEM; goto error_dti_buf_alloc; } result = wa_nep_create(wa, iface); if (result < 0) { dev_err(dev, "WA-CDS: can't initialize notif endpoint: %d\n", result); goto error_nep_create; } return 0; error_nep_create: kfree(wa->dti_buf); error_dti_buf_alloc: wa_rpipes_destroy(wa); error_rpipes_create: return result; } EXPORT_SYMBOL_GPL(wa_create); void __wa_destroy(struct wahc *wa) { if (wa->dti_urb) { usb_kill_urb(wa->dti_urb); usb_put_urb(wa->dti_urb); } kfree(wa->dti_buf); wa_nep_destroy(wa); wa_rpipes_destroy(wa); } EXPORT_SYMBOL_GPL(__wa_destroy); /** * wa_reset_all - reset the WA device * @wa: the WA to be reset * * For HWAs the radio controller and all other PALs are also reset. */ void wa_reset_all(struct wahc *wa) { /* FIXME: assuming HWA. */ wusbhc_reset_all(wa->wusb); } MODULE_AUTHOR("Inaky Perez-Gonzalez "); MODULE_DESCRIPTION("Wireless USB Wire Adapter core"); MODULE_LICENSE("GPL"); search' size='10' name='q' value=''/>
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /sound/soc/codecs/wm8998.c
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/soc/codecs/wm8998.c')