From: Meelis Roos <mroos@linux.ee>
To: netdev@vger.kernel.org, sparclinux@vger.kernel.org
Subject: DMA-API warning from sunhme - unchecked dma_map_single error
Date: Fri, 29 Nov 2013 10:40:40 +0200 (EET) [thread overview]
Message-ID: <alpine.SOC.1.00.1311291036050.3807@math.ut.ee> (raw)
I turned on DMA API debugging among other debug options to help catch an
error. So far I have only found probably unrelated things. One of them
is this splat:
WARNING: CPU: 6 PID: 1948 at lib/dma-debug.c:937 check_unmap+0x784/0x840()
hme 0000:00:01.1: DMA-API: device driver failed to check map error[device address=0x00000000c006e002] [size=342 bytes] [mapped as single]
Modules linked in:
CPU: 6 PID: 1948 Comm: dhclient Tainted: G W 3.13.0-rc1 #16
Call Trace:
[00000000004585cc] warn_slowpath_common+0x4c/0x80
[00000000004586ac] warn_slowpath_fmt+0x2c/0x40
[00000000006407e4] check_unmap+0x784/0x840
[0000000000640944] debug_dma_unmap_page+0x44/0x60
[000000000073f8c8] happy_meal_tx+0x128/0x260
[000000000073fed8] happy_meal_interrupt+0x78/0xc0
[00000000004a4b84] handle_irq_event_percpu+0x44/0x1a0
[00000000004a4d18] handle_irq_event+0x38/0x80
[00000000004a7dcc] handle_fasteoi_irq+0x10c/0x1c0
[00000000004a4300] generic_handle_irq+0x40/0x60
[000000000042bb38] handler_irq+0xb8/0xe0
[0000000000426b2c] valid_addr_bitmap_patch+0x74/0x248
[000000000049bf88] lock_acquire+0x68/0x80
[0000000000494be4] down_read_trylock+0x44/0x60
[000000000044bf54] do_sparc64_fault+0x1d4/0x700
[0000000000407964] sparc64_realfault_common+0x10/0x20
---[ end trace 9a1420108ebfd592 ]---
Mapped at:
[<0000000000740314>] happy_meal_start_xmit+0x1d4/0x4c0
[<000000000077a8f0>] dev_hard_start_xmit+0x370/0x500
[<0000000000795f8c>] sch_direct_xmit+0x4c/0x2a0
[<000000000077ae18>] dev_queue_xmit+0x398/0x7c0
[<00000000008015a8>] packet_sendmsg_spkt+0x388/0x4c0
It seems to be correct warning - dma_map_single is used unchecked in
sunhme.c. I can try fixing it - the error handling will be the only
problem. Is it considered worthwile?
--
Meelis Roos (mroos@linux.ee)
next reply other threads:[~2013-11-29 8:40 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-29 8:40 Meelis Roos [this message]
2014-10-31 17:43 ` DMA-API warning from sunhme - unchecked dma_map_single error David Miller
[not found] <20141031205258.C3A2F7FE2E@ilves.cyber.ee>
2014-10-31 21:01 ` Meelis Roos
2014-11-01 4:24 ` David Miller
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