/* * Copyright (c) 2015-2016 MediaTek Inc. * Author: Yong Wu * * 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. */ #ifndef MTK_IOMMU_SMI_H #define MTK_IOMMU_SMI_H #include #include #ifdef CONFIG_MTK_SMI #define MTK_LARB_NR_MAX 8 #define MTK_SMI_MMU_EN(port) BIT(port) struct mtk_smi_larb_iommu { struct device *dev; unsigned int mmu; }; struct mtk_smi_iommu { unsigned int larb_nr; struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX]; }; /* * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter. * It also initialize some basic setting(like iommu). * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter. * Both should be called in non-atomic context. * * Returns 0 if successful, negative on failure. */ int mtk_smi_larb_get(struct device *larbdev); void mtk_smi_larb_put(struct device *larbdev); #else static inline int mtk_smi_larb_get(struct device *larbdev) { return 0; } static inline void mtk_smi_larb_put(struct device *larbdev) { } #endif #endif t'>Tobias Klauser
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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 /net/phonet/socket.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 'net/phonet/socket.c')