/* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License version 2. */ #include #include #include #include #include #include #include "gfs2.h" #include "incore.h" #include "dir.h" #include "glock.h" #include "super.h" #include "util.h" #include "inode.h" /** * gfs2_drevalidate - Check directory lookup consistency * @dentry: the mapping to check * @flags: lookup flags * * Check to make sure the lookup necessary to arrive at this inode from its * parent is still good. * * Returns: 1 if the dentry is ok, 0 if it isn't */ static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags) { struct dentry *parent; struct gfs2_sbd *sdp; struct gfs2_inode *dip; struct inode *inode; struct gfs2_holder d_gh; struct gfs2_inode *ip = NULL; int error; int had_lock = 0; if (flags & LOOKUP_RCU) return -ECHILD; parent = dget_parent(dentry); sdp = GFS2_SB(d_inode(parent)); dip = GFS2_I(d_inode(parent)); inode = d_inode(dentry); if (inode) { if (is_bad_inode(inode)) goto invalid; ip = GFS2_I(inode); } if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) goto valid; had_lock = (gfs2_glock_is_locked_by_me(dip->i_gl) != NULL); if (!had_lock) { error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); if (error) goto fail; } error = gfs2_dir_check(d_inode(parent), &dentry->d_name, ip); switch (error) { case 0: if (!inode) goto invalid_gunlock; break; case -ENOENT: if (!inode) goto valid_gunlock; goto invalid_gunlock; default: goto fail_gunlock; } valid_gunlock: if (!had_lock) gfs2_glock_dq_uninit(&d_gh); valid: dput(parent); return 1; invalid_gunlock: if (!had_lock) gfs2_glock_dq_uninit(&d_gh); invalid: dput(parent); return 0; fail_gunlock: gfs2_glock_dq_uninit(&d_gh); fail: dput(parent); return 0; } static int gfs2_dhash(const struct dentry *dentry, struct qstr *str) { str->hash = gfs2_disk_hash(str->name, str->len); return 0; } static int gfs2_dentry_delete(const struct dentry *dentry) { struct gfs2_inode *ginode; if (d_really_is_negative(dentry)) return 0; ginode = GFS2_I(d_inode(dentry)); if (!gfs2_holder_initialized(&ginode->i_iopen_gh)) return 0; if (test_bit(GLF_DEMOTE, &ginode->i_iopen_gh.gh_gl->gl_flags)) return 1; return 0; } const struct dentry_operations gfs2_dops = { .d_revalidate = gfs2_drevalidate, .d_hash = gfs2_dhash, .d_delete = gfs2_dentry_delete, }; et-next.git/commit/include?id=7a7b5df84b6b4e5d599c7289526eed96541a0654'>include/dt-bindings/gpio
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authorJohan Hovold <johan@kernel.org>2017-01-30 11:26:38 +0100
committerJiri Kosina <jkosina@suse.cz>2017-01-31 12:59:32 +0100
commit7a7b5df84b6b4e5d599c7289526eed96541a0654 (patch)
treecf7514c7ddf4410fe37ca9099a2785e1cf08fa7d /include/dt-bindings/gpio
parent877a021e08ccb6434718c0cc781fdf943c884cc0 (diff)
HID: cp2112: fix sleep-while-atomic
A recent commit fixing DMA-buffers on stack added a shared transfer buffer protected by a spinlock. This is broken as the USB HID request callbacks can sleep. Fix this up by replacing the spinlock with a mutex. Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable") Cc: stable <stable@vger.kernel.org> # 4.9 Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'include/dt-bindings/gpio')