/* * Copyright (C) 2008 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License v2 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., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef __BTRFS_LOCKING_ #define __BTRFS_LOCKING_ #define BTRFS_WRITE_LOCK 1 #define BTRFS_READ_LOCK 2 #define BTRFS_WRITE_LOCK_BLOCKING 3 #define BTRFS_READ_LOCK_BLOCKING 4 void btrfs_tree_lock(struct extent_buffer *eb); void btrfs_tree_unlock(struct extent_buffer *eb); void btrfs_tree_read_lock(struct extent_buffer *eb); void btrfs_tree_read_unlock(struct extent_buffer *eb); void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb); void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw); void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw); void btrfs_assert_tree_locked(struct extent_buffer *eb); int btrfs_try_tree_read_lock(struct extent_buffer *eb); int btrfs_try_tree_write_lock(struct extent_buffer *eb); int btrfs_tree_read_lock_atomic(struct extent_buffer *eb); static inline void btrfs_tree_unlock_rw(struct extent_buffer *eb, int rw) { if (rw == BTRFS_WRITE_LOCK || rw == BTRFS_WRITE_LOCK_BLOCKING) btrfs_tree_unlock(eb); else if (rw == BTRFS_READ_LOCK_BLOCKING) btrfs_tree_read_unlock_blocking(eb); else if (rw == BTRFS_READ_LOCK) btrfs_tree_read_unlock(eb); else BUG(); } static inline void btrfs_set_lock_blocking(struct extent_buffer *eb) { btrfs_set_lock_blocking_rw(eb, BTRFS_WRITE_LOCK); } static inline void btrfs_clear_lock_blocking(struct extent_buffer *eb) { btrfs_clear_lock_blocking_rw(eb, BTRFS_WRITE_LOCK_BLOCKING); } #endif e/nosy-dump.c?h=nds-private-remove&id=dfef358bd1beb4e7b5c94eca944be9cd23dfc752'>commitdiff
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /tools/firewire/nosy-dump.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'tools/firewire/nosy-dump.c')