Hi Hans,
Please re-check your git pull request for this tree:
git://linuxtv.org/hverkuil/media_tree.git cx23b
You added this patch, but with a different (bad) subject, without any
comments, without c/c to stable and without Marek's ack. So, there's
something wrong there.
Also, I think we should first merge this patch for 3.17 before pulling
the cx23885 patchset.
Regards,
Mauro
Em Fri, 01 Aug 2014 14:18:50 +0200
Hans Verkuil <[email protected]> escreveu:
> sg_alloc_table_from_pages() only allocates a sg_table, so it should just use
> GFP_KERNEL, not gfp_flags. If gfp_flags contains __GFP_DMA32 then mm/sl[au]b.c
> will call BUG_ON:
>
> [ 358.027515] ------------[ cut here ]------------
> [ 358.027546] kernel BUG at mm/slub.c:1416!
> [ 358.027558] invalid opcode: 0000 [#1] PREEMPT SMP
> [ 358.027576] Modules linked in: mt2131 s5h1409 tda8290 tuner cx25840
> cx23885 btcx_risc altera_ci tda18271 altera_stapl videobuf2_dvb tveeprom
> cx2341x videobuf2_dma_sg dvb_core rc_core videobuf2_memops videobuf2_core
> nouveau zr36067 videocodec v4l2_common videodev media x86_pkg_temp_thermal
> cfbfillrect cfbimgblt cfbcopyarea ttm drm_kms_helper processor button isci
> [ 358.027712] CPU: 19 PID: 3654 Comm: cat Not tainted 3.16.0-rc6-telek #167
> [ 358.027723] Hardware name: ASUSTeK COMPUTER INC. Z9PE-D8 WS/Z9PE-D8 WS,
> BIOS 5404 02/10/2014
> [ 358.027741] task: ffff880897c7d960 ti: ffff88089b4d4000 task.ti:
> ffff88089b4d4000
> [ 358.027753] RIP: 0010:[<ffffffff81196040>] [<ffffffff81196040>]
> new_slab+0x280/0x320
> [ 358.027776] RSP: 0018:ffff88089b4d7ae8 EFLAGS: 00010002
> [ 358.027787] RAX: ffff880897c7d960 RBX: 0000000000000000 RCX:
> ffff88089b4d7b50
> [ 358.027798] RDX: 00000000ffffffff RSI: 0000000000000004 RDI:
> ffff88089f803b00
> [ 358.027809] RBP: ffff88089b4d7bb8 R08: 0000000000000000 R09:
> 0000000100400040
> [ 358.027821] R10: 0000160000000000 R11: ffff88109bc02c40 R12:
> 0000000000000001
> [ 358.027832] R13: ffff88089f8000c0 R14: ffff88089f803b00 R15:
> ffff8810bfcf4be0
> [ 358.027845] FS: 00007f83fe5c0700(0000) GS:ffff8810bfce0000(0000)
> knlGS:0000000000000000
> [ 358.027858] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 358.027868] CR2: 0000000001dfd568 CR3: 0000001097d5a000 CR4:
> 00000000000407e0
> [ 358.027878] Stack:
> [ 358.027885] ffffffff81198860 ffff8810bfcf4be0 ffff880897c7d960
> 0000000000001b00
> [ 358.027905] ffff880897c7d960 0000000000000000 ffff8810bfcf4bf0
> 0000000000000000
> [ 358.027924] 0000000000000000 0000000100000100 ffffffff813ef84a
> 00000004ffffffff
> [ 358.027944] Call Trace:
> [ 358.027956] [<ffffffff81198860>] ? __slab_alloc+0x400/0x4e0
> [ 358.027973] [<ffffffff813ef84a>] ? sg_kmalloc+0x1a/0x30
> [ 358.027985] [<ffffffff81198f17>] __kmalloc+0x127/0x150
> [ 358.027997] [<ffffffff813ef84a>] ? sg_kmalloc+0x1a/0x30
> [ 358.028009] [<ffffffff813ef84a>] sg_kmalloc+0x1a/0x30
> [ 358.028023] [<ffffffff813eff84>] __sg_alloc_table+0x74/0x180
> [ 358.028035] [<ffffffff813ef830>] ? sg_kfree+0x20/0x20
> [ 358.028048] [<ffffffff813f00af>] sg_alloc_table+0x1f/0x60
> [ 358.028061] [<ffffffff813f0174>] sg_alloc_table_from_pages+0x84/0x1f0
> [ 358.028077] [<ffffffffa007c3f9>] vb2_dma_sg_alloc+0x159/0x230
> [videobuf2_dma_sg]
> [ 358.028095] [<ffffffffa003d55a>] __vb2_queue_alloc+0x10a/0x680
> [videobuf2_core]
> [ 358.028113] [<ffffffffa003e110>] __reqbufs.isra.14+0x220/0x3e0
> [videobuf2_core]
> [ 358.028130] [<ffffffffa003e79d>] __vb2_init_fileio+0xbd/0x380
> [videobuf2_core]
> [ 358.028147] [<ffffffffa003f563>] __vb2_perform_fileio+0x5b3/0x6e0
> [videobuf2_core]
> [ 358.028164] [<ffffffffa003f871>] vb2_fop_read+0xb1/0x100 [videobuf2_core]
> [ 358.028184] [<ffffffffa06dd2e5>] v4l2_read+0x65/0xb0 [videodev]
> [ 358.028198] [<ffffffff811a243f>] vfs_read+0x8f/0x170
> [ 358.028210] [<ffffffff811a30a1>] SyS_read+0x41/0xb0
> [ 358.028224] [<ffffffff818f02e9>] system_call_fastpath+0x16/0x1b
> [ 358.028234] Code: 66 90 e9 dc fd ff ff 0f 1f 40 00 41 8b 4d 68 e9 d5 fe ff
> ff 0f 1f 80 00 00 00 00 f0 41 80 4d 00 40 e9 03 ff ff ff 0f 1f 44 00 00 <0f>
> 0b 66 0f 1f 44 00 00 44 89 c6 4c 89 45 d0 e8 0c 82 ff ff 48
> [ 358.028415] RIP [<ffffffff81196040>] new_slab+0x280/0x320
> [ 358.028432] RSP <ffff88089b4d7ae8>
> [ 358.032208] ---[ end trace 6443240199c706e4 ]---
>
> Signed-off-by: Hans Verkuil <[email protected]>
> Cc: [email protected] # for v3.13 and up
>
> diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c
> b/drivers/media/v4l2-core/videobuf2-dma-sg.c
> index adefc31..9b163a4 100644
> --- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
> +++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
> @@ -113,7 +113,7 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned
> long size, gfp_t gfp_fla
> goto fail_pages_alloc;
>
> ret = sg_alloc_table_from_pages(&buf->sg_table, buf->pages,
> - buf->num_pages, 0, size, gfp_flags);
> + buf->num_pages, 0, size, GFP_KERNEL);
> if (ret)
> goto fail_table_alloc;
>
> --
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