/* * net/sched/em_cmp.c Simple packet data comparison ematch * * 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. * * Authors: Thomas Graf */ #include #include #include #include #include #include #include static inline int cmp_needs_transformation(struct tcf_em_cmp *cmp) { return unlikely(cmp->flags & TCF_EM_CMP_TRANS); } static int em_cmp_match(struct sk_buff *skb, struct tcf_ematch *em, struct tcf_pkt_info *info) { struct tcf_em_cmp *cmp = (struct tcf_em_cmp *) em->data; unsigned char *ptr = tcf_get_base_ptr(skb, cmp->layer) + cmp->off; u32 val = 0; if (!tcf_valid_offset(skb, ptr, cmp->align)) return 0; switch (cmp->align) { case TCF_EM_ALIGN_U8: val = *ptr; break; case TCF_EM_ALIGN_U16: val = get_unaligned_be16(ptr); if (cmp_needs_transformation(cmp)) val = be16_to_cpu(val); break; case TCF_EM_ALIGN_U32: /* Worth checking boundries? The branching seems * to get worse. Visit again. */ val = get_unaligned_be32(ptr); if (cmp_needs_transformation(cmp)) val = be32_to_cpu(val); break; default: return 0; } if (cmp->mask) val &= cmp->mask; switch (cmp->opnd) { case TCF_EM_OPND_EQ: return val == cmp->val; case TCF_EM_OPND_LT: return val < cmp->val; case TCF_EM_OPND_GT: return val > cmp->val; } return 0; } static struct tcf_ematch_ops em_cmp_ops = { .kind = TCF_EM_CMP, .datalen = sizeof(struct tcf_em_cmp), .match = em_cmp_match, .owner = THIS_MODULE, .link = LIST_HEAD_INIT(em_cmp_ops.link) }; static int __init init_em_cmp(void) { return tcf_em_register(&em_cmp_ops); } static void __exit exit_em_cmp(void) { tcf_em_unregister(&em_cmp_ops); } MODULE_LICENSE("GPL"); module_init(init_em_cmp); module_exit(exit_em_cmp); MODULE_ALIAS_TCF_EMATCH(TCF_EM_CMP); >commitdiff
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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/pci/ymfpci
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/pci/ymfpci')