Alexander Shishkin 0ed2424b91 intel_th: Use correct device when freeing buffers ... Commit d5c435df4a ("intel_th: msu: Use the real device in case of IOMMU domain allocation") changes dma buffer allocation to use the actual underlying device, but forgets to change the deallocation path, which leads to (if you've got CAP_SYS_RAWIO): > # echo 0,0 > /sys/bus/intel_th/devices/0-msc0/nr_pages > ------------[ cut here ]------------ > kernel BUG at ../linux/drivers/iommu/intel-iommu.c:3670! > CPU: 3 PID: 231 Comm: sh Not tainted 4.17.0-rc1+ #2729 > RIP: 0010:intel_unmap+0x11e/0x130 ... > Call Trace: > intel_free_coherent+0x3e/0x60 > msc_buffer_win_free+0x100/0x160 [intel_th_msu] This patch fixes the buffer deallocation code to use the correct device. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Fixes: d5c435df4a ("intel_th: msu: Use the real device in case of IOMMU domain allocation") Reported-by: Baofeng Tian <baofeng.tian@intel.com> CC: stable@vger.kernel.org # v4.14+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-05-25 18:09:17 +02:00
..
coresight	Char/Misc patches for 4.17-rc1	2018-04-04 20:07:20 -07:00
intel_th	intel_th: Use correct device when freeing buffers	2018-05-25 18:09:17 +02:00
stm	stm class: Use vmalloc for the master map	2018-05-25 18:09:16 +02:00
Kconfig	hwtracing: Add HW tracing support menu	2018-03-29 13:38:10 +03:00