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RTL2832U driver containing new tuners (fc0011, fc0012, fc0013, r820t, e4000, ... ) not available in the 3.4 kernel #74

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merged 1 commit into from
Jan 16, 2015

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catalinii
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Driver is from http://forums.openpli.org/topic/20899-rtl2832u-chipset-support-proposal/page-6?p=329670#entry329670 - adds support for multiple frontends not supported in kernel 3.4. Disable old rtl28xx driver and enable the new rtl2832 in the defconfig

…hipset-support-proposal/page-6?p=329670#entry329670 - adds support for multiple frontends not supported in kernel 3.4. Disable old rtl28xx driver and enable the new rtl2832
@catalinii
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The patch was already tested and the kernel compiles and the new driver can be installed successfully.

@mdrjr
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mdrjr commented Jan 16, 2015

Thank you for that.

mdrjr added a commit that referenced this pull request Jan 16, 2015
RTL2832U driver containing new tuners (fc0011, fc0012, fc0013, r820t, e4000, ... ) not available in the 3.4 kernel
@mdrjr mdrjr merged commit 1295533 into hardkernel:odroidxu-3.4.y Jan 16, 2015
Obihoernchen pushed a commit to Obihoernchen/linux that referenced this pull request Mar 5, 2016
commit d96b339 upstream.

I saw the following BUG_ON triggered in a testcase where a process calls
madvise(MADV_SOFT_OFFLINE) on thps, along with a background process that
calls migratepages command repeatedly (doing ping-pong among different
NUMA nodes) for the first process:

   Soft offlining page 0x60000 at 0x700000600000
   __get_any_page: 0x60000 free buddy page
   page:ffffea0001800000 count:0 mapcount:-127 mapping:          (null) index:0x1
   flags: 0x1fffc0000000000()
   page dumped because: VM_BUG_ON_PAGE(atomic_read(&page->_count) == 0)
   ------------[ cut here ]------------
   kernel BUG at /src/linux-dev/include/linux/mm.h:342!
   invalid opcode: 0000 [hardkernel#1] SMP DEBUG_PAGEALLOC
   Modules linked in: cfg80211 rfkill crc32c_intel serio_raw virtio_balloon i2c_piix4 virtio_blk virtio_net ata_generic pata_acpi
   CPU: 3 PID: 3035 Comm: test_alloc_gene Tainted: G           O    4.4.0-rc8-v4.4-rc8-160107-1501-00000-rc8+ hardkernel#74
   Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
   task: ffff88007c63d5c0 ti: ffff88007c210000 task.ti: ffff88007c210000
   RIP: 0010:[<ffffffff8118998c>]  [<ffffffff8118998c>] put_page+0x5c/0x60
   RSP: 0018:ffff88007c213e00  EFLAGS: 00010246
   Call Trace:
     put_hwpoison_page+0x4e/0x80
     soft_offline_page+0x501/0x520
     SyS_madvise+0x6bc/0x6f0
     entry_SYSCALL_64_fastpath+0x12/0x6a
   Code: 8b fc ff ff 5b 5d c3 48 89 df e8 b0 fa ff ff 48 89 df 31 f6 e8 c6 7d ff ff 5b 5d c3 48 c7 c6 08 54 a2 81 48 89 df e8 a4 c5 01 00 <0f> 0b 66 90 66 66 66 66 90 55 48 89 e5 41 55 41 54 53 48 8b 47
   RIP  [<ffffffff8118998c>] put_page+0x5c/0x60
    RSP <ffff88007c213e00>

The root cause resides in get_any_page() which retries to get a refcount
of the page to be soft-offlined.  This function calls
put_hwpoison_page(), expecting that the target page is putback to LRU
list.  But it can be also freed to buddy.  So the second check need to
care about such case.

Fixes: af8fae7 ("mm/memory-failure.c: clean up soft_offline_page()")
Signed-off-by: Naoya Horiguchi <[email protected]>
Cc: Sasha Levin <[email protected]>
Cc: Aneesh Kumar K.V <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Jerome Marchand <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Steve Capper <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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2 participants