Liwei Song 17e83549e1 i2c: ismt: fix wrong device address when unmap the data buffer ... Fix the following kernel bug: kernel BUG at drivers/iommu/intel-iommu.c:3260! invalid opcode: 0000 [#5] PREEMPT SMP Hardware name: Intel Corp. Harcuvar/Server, BIOS HAVLCRB0.X64.0013.D39.1608311820 08/31/2016 task: ffff880175389950 ti: ffff880176bec000 task.ti: ffff880176bec000 RIP: 0010:[<ffffffff8150a83b>] [<ffffffff8150a83b>] intel_unmap+0x25b/0x260 RSP: 0018:ffff880176bef5e8 EFLAGS: 00010296 RAX: 0000000000000024 RBX: ffff8800773c7c88 RCX: 000000000000ce04 RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000009 RBP: ffff880176bef638 R08: 0000000000000010 R09: 0000000000000004 R10: ffff880175389c78 R11: 0000000000000a4f R12: ffff8800773c7868 R13: 00000000ffffac88 R14: ffff8800773c7818 R15: 0000000000000001 FS: 00007fef21258700(0000) GS:ffff88017b5c0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000066d6d8 CR3: 000000007118c000 CR4: 00000000003406e0 Stack: 00000000ffffac88 ffffffff8199867f ffff880176bef5f8 ffff880100000030 ffff880176bef668 ffff8800773c7c88 ffff880178288098 ffff8800772c0010 ffff8800773c7818 0000000000000001 ffff880176bef648 ffffffff8150a86e Call Trace: [<ffffffff8199867f>] ? printk+0x46/0x48 [<ffffffff8150a86e>] intel_unmap_page+0xe/0x10 [<ffffffffa039d99b>] ismt_access+0x27b/0x8fa [i2c_ismt] [<ffffffff81554420>] ? __pm_runtime_suspend+0xa0/0xa0 [<ffffffff815544a0>] ? pm_suspend_timer_fn+0x80/0x80 [<ffffffff81554420>] ? __pm_runtime_suspend+0xa0/0xa0 [<ffffffff815544a0>] ? pm_suspend_timer_fn+0x80/0x80 [<ffffffff8143dfd0>] ? pci_bus_read_dev_vendor_id+0xf0/0xf0 [<ffffffff8172b36c>] i2c_smbus_xfer+0xec/0x4b0 [<ffffffff810aa4d5>] ? vprintk_emit+0x345/0x530 [<ffffffffa038936b>] i2cdev_ioctl_smbus+0x12b/0x240 [i2c_dev] [<ffffffff810aa829>] ? vprintk_default+0x29/0x40 [<ffffffffa0389b33>] i2cdev_ioctl+0x63/0x1ec [i2c_dev] [<ffffffff811b04c8>] do_vfs_ioctl+0x328/0x5d0 [<ffffffff8119d8ec>] ? vfs_write+0x11c/0x190 [<ffffffff8109d449>] ? rt_up_read+0x19/0x20 [<ffffffff811b07f1>] SyS_ioctl+0x81/0xa0 [<ffffffff819a351b>] system_call_fastpath+0x16/0x6e This happen When run "i2cdetect -y 0" detect SMBus iSMT adapter. After finished I2C block read/write, when unmap the data buffer, a wrong device address was pass to dma_unmap_single(). To fix this, give dma_unmap_single() the "dev" parameter, just like what dma_map_single() does, then unmap can find the right devices. Fixes: 13f35ac14c ("i2c: Adding support for Intel iSMT SMBus 2.0 host controller") Signed-off-by: Liwei Song <liwei.song@windriver.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>		2017-06-15 16:07:03 +02:00
..
algos	i2c: algo-bit: declare i2c_bit_quirk_no_clk_stretch as static	2016-05-11 17:16:30 +02:00
busses	i2c: ismt: fix wrong device address when unmap the data buffer	2017-06-15 16:07:03 +02:00
muxes	i2c: mux: reg: rename label to indicate what it does	2017-05-15 18:49:10 +02:00
i2c-boardinfo.c	i2c: allow attaching IRQ resources to i2c_board_info	2017-04-01 09:36:19 -07:00
i2c-core.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2017-05-03 12:38:20 -07:00
i2c-core.h	i2c: remove FSF address	2014-11-07 18:35:33 +01:00
i2c-dev.c	i2c: fix kernel memory disclosure in dev interface	2017-01-12 20:06:10 +01:00
i2c-mux.c	i2c: mux: only print failure message on error	2017-05-15 18:49:11 +02:00
i2c-slave-eeprom.c	i2c: Drop owner assignment from i2c_driver	2015-08-10 08:37:35 +02:00
i2c-smbus.c	i2c: use an IRQ to report Host Notify events, not alert	2016-11-24 16:22:06 +01:00
i2c-stub.c	i2c: i2c-stub: sort includes	2016-02-20 23:33:39 +01:00
Kconfig	Merge branch 'i2c/for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2016-12-15 12:56:35 -08:00
Makefile	i2c: slave-eeprom: add eeprom simulator driver	2014-12-11 22:25:54 +01:00