/* * w1_family.c * * Copyright (c) 2004 Evgeniy Polyakov * * * 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. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include /* schedule_timeout() */ #include #include #include "w1_family.h" #include "w1.h" DEFINE_SPINLOCK(w1_flock); static LIST_HEAD(w1_families); /** * w1_register_family() - register a device family driver * @newf: family to register */ int w1_register_family(struct w1_family *newf) { struct list_head *ent, *n; struct w1_family *f; int ret = 0; spin_lock(&w1_flock); list_for_each_safe(ent, n, &w1_families) { f = list_entry(ent, struct w1_family, family_entry); if (f->fid == newf->fid) { ret = -EEXIST; break; } } if (!ret) { atomic_set(&newf->refcnt, 0); list_add_tail(&newf->family_entry, &w1_families); } spin_unlock(&w1_flock); /* check default devices against the new set of drivers */ w1_reconnect_slaves(newf, 1); return ret; } /** * w1_unregister_family() - unregister a device family driver * @fent: family to unregister */ void w1_unregister_family(struct w1_family *fent) { struct list_head *ent, *n; struct w1_family *f; spin_lock(&w1_flock); list_for_each_safe(ent, n, &w1_families) { f = list_entry(ent, struct w1_family, family_entry); if (f->fid == fent->fid) { list_del(&fent->family_entry); break; } } spin_unlock(&w1_flock); /* deatch devices using this family code */ w1_reconnect_slaves(fent, 0); while (atomic_read(&fent->refcnt)) { pr_info("Waiting for family %u to become free: refcnt=%d.\n", fent->fid, atomic_read(&fent->refcnt)); if (msleep_interruptible(1000)) flush_signals(current); } } /* * Should be called under w1_flock held. */ struct w1_family * w1_family_registered(u8 fid) { struct list_head *ent, *n; struct w1_family *f = NULL; int ret = 0; list_for_each_safe(ent, n, &w1_families) { f = list_entry(ent, struct w1_family, family_entry); if (f->fid == fid) { ret = 1; break; } } return (ret) ? f : NULL; } static void __w1_family_put(struct w1_family *f) { atomic_dec(&f->refcnt); } void w1_family_put(struct w1_family *f) { spin_lock(&w1_flock); __w1_family_put(f); spin_unlock(&w1_flock); } #if 0 void w1_family_get(struct w1_family *f) { spin_lock(&w1_flock); __w1_family_get(f); spin_unlock(&w1_flock); } #endif /* 0 */ void __w1_family_get(struct w1_family *f) { smp_mb__before_atomic(); atomic_inc(&f->refcnt); smp_mb__after_atomic(); } EXPORT_SYMBOL(w1_unregister_family); EXPORT_SYMBOL(w1_register_family); alue='11e3b725cfc282efe9d4a354153e99d86a16af08'/>
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-01-17 13:46:29 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2017-01-23 22:41:33 +0800
commit11e3b725cfc282efe9d4a354153e99d86a16af08 (patch)
tree8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6 /include/net/dst_metadata.h
parentd6040764adcb5cb6de1489422411d701c158bb69 (diff)
crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes
Update the ARMv8 Crypto Extensions and the plain NEON AES implementations in CBC and CTR modes to return the next IV back to the skcipher API client. This is necessary for chaining to work correctly. Note that for CTR, this is only done if the request is a round multiple of the block size, since otherwise, chaining is impossible anyway. Cc: <stable@vger.kernel.org> # v3.16+ Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/net/dst_metadata.h')