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| author | Sudeep Dutt <sudeep.dutt@intel.com> | 2015-07-22 11:50:10 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-07-22 21:25:36 -0700 |
| commit | a63444375f08a18a6b2286351606f08d6e9fa63d (patch) | |
| tree | 50b8d06e46c69e55148b2ba1565479a743bdebd6 /drivers/misc/mei | |
| parent | 68d35c7b3b1aa686e3039eb2626bf5e3ea8dbe81 (diff) | |
misc: mic: scif bug fix for vmalloc_to_page crash
v4.2-rc1 enabled huge page support for ioremap(..).
Calling vmalloc_to_page after v4.2-rc1 results in the
crash shown below on the host upon booting X100 coprocessors:
BUG: unable to handle kernel paging request at ffffc47c00000000
IP: [<ffffffff811a2c0c>] vmalloc_to_page+0x6c/0xb0
This patch fixes this crash by obtaining the fake struct page
pointer which is required to be passed into dma_map_sg(..)
by calling pfn_to_page(..) instead of vmalloc_to_page(..).
Link: https://lkml.org/lkml/2015/7/18/110
Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Suggested-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei')
0 files changed, 0 insertions, 0 deletions