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| author | Edgar Cherkasov <echerkasov@dev.rtsoft.ru> | 2018-09-27 11:56:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-18 09:16:25 +0200 |
| commit | 74a960430a8d01c33844884a382264599072d3c8 (patch) | |
| tree | 85802bb9f603f2d98ea0d17ab42818e73c537eec /drivers/vhost | |
| parent | 1b7ff5208d2f154c26b9692ddf1b761c9b7339f2 (diff) | |
| download | linux-rpi3-74a960430a8d01c33844884a382264599072d3c8.tar.gz linux-rpi3-74a960430a8d01c33844884a382264599072d3c8.tar.bz2 linux-rpi3-74a960430a8d01c33844884a382264599072d3c8.zip | |
i2c: i2c-scmi: fix for i2c_smbus_write_block_data
commit 08d9db00fe0e300d6df976e6c294f974988226dd upstream.
The i2c-scmi driver crashes when the SMBus Write Block transaction is
executed:
WARNING: CPU: 9 PID: 2194 at mm/page_alloc.c:3931 __alloc_pages_slowpath+0x9db/0xec0
Call Trace:
? get_page_from_freelist+0x49d/0x11f0
? alloc_pages_current+0x6a/0xe0
? new_slab+0x499/0x690
__alloc_pages_nodemask+0x265/0x280
alloc_pages_current+0x6a/0xe0
kmalloc_order+0x18/0x40
kmalloc_order_trace+0x24/0xb0
? acpi_ut_allocate_object_desc_dbg+0x62/0x10c
__kmalloc+0x203/0x220
acpi_os_allocate_zeroed+0x34/0x36
acpi_ut_copy_eobject_to_iobject+0x266/0x31e
acpi_evaluate_object+0x166/0x3b2
acpi_smbus_cmi_access+0x144/0x530 [i2c_scmi]
i2c_smbus_xfer+0xda/0x370
i2cdev_ioctl_smbus+0x1bd/0x270
i2cdev_ioctl+0xaa/0x250
do_vfs_ioctl+0xa4/0x600
SyS_ioctl+0x79/0x90
do_syscall_64+0x73/0x130
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
ACPI Error: Evaluating _SBW: 4 (20170831/smbus_cmi-185)
This problem occurs because the length of ACPI Buffer object is not
defined/initialized in the code before a corresponding ACPI method is
called. The obvious patch below fixes this issue.
Signed-off-by: Edgar Cherkasov <echerkasov@dev.rtsoft.ru>
Acked-by: Viktor Krasnov <vkrasnov@dev.rtsoft.ru>
Acked-by: Michael Brunner <Michael.Brunner@kontron.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/vhost')
0 files changed, 0 insertions, 0 deletions