/* * MUSB OTG driver - support for Mentor's DMA controller * * Copyright 2005 Mentor Graphics Corporation * Copyright (C) 2005-2007 by Texas Instruments * * 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. * * 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., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef CONFIG_BLACKFIN #define MUSB_HSDMA_BASE 0x200 #define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) #define MUSB_HSDMA_CONTROL 0x4 #define MUSB_HSDMA_ADDRESS 0x8 #define MUSB_HSDMA_COUNT 0xc #define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset) #define musb_read_hsdma_addr(mbase, bchannel) \ musb_readl(mbase, \ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS)) #define musb_write_hsdma_addr(mbase, bchannel, addr) \ musb_writel(mbase, \ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS), \ addr) #define musb_read_hsdma_count(mbase, bchannel) \ musb_readl(mbase, \ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT)) #define musb_write_hsdma_count(mbase, bchannel, len) \ musb_writel(mbase, \ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT), \ len) #else #define MUSB_HSDMA_BASE 0x400 #define MUSB_HSDMA_INTR (MUSB_HSDMA_BASE + 0) #define MUSB_HSDMA_CONTROL 0x04 #define MUSB_HSDMA_ADDR_LOW 0x08 #define MUSB_HSDMA_ADDR_HIGH 0x0C #define MUSB_HSDMA_COUNT_LOW 0x10 #define MUSB_HSDMA_COUNT_HIGH 0x14 #define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \ (MUSB_HSDMA_BASE + (_bchannel * 0x20) + _offset) static inline u32 musb_read_hsdma_addr(void __iomem *mbase, u8 bchannel) { u32 addr = musb_readw(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH)); addr = addr << 16; addr |= musb_readw(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW)); return addr; } static inline void musb_write_hsdma_addr(void __iomem *mbase, u8 bchannel, dma_addr_t dma_addr) { musb_writew(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_LOW), dma_addr); musb_writew(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDR_HIGH), (dma_addr >> 16)); } static inline u32 musb_read_hsdma_count(void __iomem *mbase, u8 bchannel) { u32 count = musb_readw(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH)); count = count << 16; count |= musb_readw(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW)); return count; } static inline void musb_write_hsdma_count(void __iomem *mbase, u8 bchannel, u32 len) { musb_writew(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_LOW),len); musb_writew(mbase, MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT_HIGH), (len >> 16)); } #endif /* CONFIG_BLACKFIN */ /* control register (16-bit): */ #define MUSB_HSDMA_ENABLE_SHIFT 0 #define MUSB_HSDMA_TRANSMIT_SHIFT 1 #define MUSB_HSDMA_MODE1_SHIFT 2 #define MUSB_HSDMA_IRQENABLE_SHIFT 3 #define MUSB_HSDMA_ENDPOINT_SHIFT 4 #define MUSB_HSDMA_BUSERROR_SHIFT 8 #define MUSB_HSDMA_BURSTMODE_SHIFT 9 #define MUSB_HSDMA_BURSTMODE (3 << MUSB_HSDMA_BURSTMODE_SHIFT) #define MUSB_HSDMA_BURSTMODE_UNSPEC 0 #define MUSB_HSDMA_BURSTMODE_INCR4 1 #define MUSB_HSDMA_BURSTMODE_INCR8 2 #define MUSB_HSDMA_BURSTMODE_INCR16 3 #define MUSB_HSDMA_CHANNELS 8 struct musb_dma_controller; struct musb_dma_channel { struct dma_channel channel; struct musb_dma_controller *controller; u32 start_addr; u32 len; u16 max_packet_sz; u8 idx; u8 epnum; u8 transmit; }; struct musb_dma_controller { struct dma_controller controller; struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS]; void *private_data; void __iomem *base; u8 channel_count; u8 used_channels; int irq; }; .org>2017-01-26 16:47:28 -0500 commit07cd12945551b63ecb1a349d50a6d69d1d6feb4a (patch) tree75f65eba7eac9277971082a2d5a4cf1370562c0c /drivers/usb/host/whci/hw.c parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems before the new cgroup is associated with it kernfs_node. This is fine for cgroup proper but cgroup_name/path() depend on the associated kernfs_node and if a subsystem makes the new cgroup_subsys_state visible, which they're allowed to after onlining, it can lead to NULL dereference. The current code performs cgroup creation and subsystem onlining in cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems visible afterwards. There's no reason to online the subsystems early and we can simply drop cgroup_apply_control_enable() call from cgroup_create() so that the subsystems are onlined and made visible at the same time. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") Cc: stable@vger.kernel.org # v4.6+
Diffstat (limited to 'drivers/usb/host/whci/hw.c')