On Jun 24, 2014, at 9:47 AM, Anna Schumaker <schumaker.a...@gmail.com> wrote:
> On 06/19/2014 09:06 AM, Yan Burman wrote:
>> Fix the following warning when DMA-API debug is enabled by checking
>> ib_dma_map_single result:
>> [ 1455.345548] ------------[ cut here ]------------
>> [ 1455.346863] WARNING: CPU: 3 PID: 3929 at
>> /home/yanb/kernel/net-next/lib/dma-debug.c:1140 check_unmap+0x4e5/0x990()
>> [ 1455.349350] mlx4_core 0000:00:07.0: DMA-API: device driver failed to
>> check map error[device address=0x000000007c9f2090] [size=2656 bytes] [mapped
>> as single]
>> [ 1455.349350] Modules linked in: xprtrdma netconsole configfs nfsv3 nfs_acl
>> ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm autofs4
>> auth_rpcgss oid_registry nfsv4 nfs fscache lockd sunrpc dm_mirror
>> dm_region_hash dm_log microcode pcspkr mlx4_ib ib_sa ib_mad ib_core ib_addr
>> mlx4_en ipv6 ptp pps_core vxlan mlx4_core virtio_balloon cirrus ttm
>> drm_kms_helper drm sysimgblt sysfillrect syscopyarea i2c_piix4 i2c_core
>> button ext3 jbd virtio_blk virtio_net virtio_pci virtio_ring virtio uhci_hcd
>> ata_generic ata_piix libata
>> [ 1455.349350] CPU: 3 PID: 3929 Comm: mount.nfs Not tainted 3.15.0-rc1-dbg+
>> #13
>> [ 1455.349350] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
>> [ 1455.349350] 0000000000000474 ffff880069dcf628 ffffffff8151c341
>> ffffffff817b69d8
>> [ 1455.349350] ffff880069dcf678 ffff880069dcf668 ffffffff8105b5fc
>> 0000000069dcf658
>> [ 1455.349350] ffff880069dcf778 ffff88007b0c9f00 ffffffff8255ec40
>> 0000000000000a60
>> [ 1455.349350] Call Trace:
>> [ 1455.349350] [<ffffffff8151c341>] dump_stack+0x52/0x81
>> [ 1455.349350] [<ffffffff8105b5fc>] warn_slowpath_common+0x8c/0xc0
>> [ 1455.349350] [<ffffffff8105b6e6>] warn_slowpath_fmt+0x46/0x50
>> [ 1455.349350] [<ffffffff812e6305>] check_unmap+0x4e5/0x990
>> [ 1455.349350] [<ffffffff81521fb0>] ? _raw_spin_unlock_irq+0x30/0x60
>> [ 1455.349350] [<ffffffff812e6a0a>] debug_dma_unmap_page+0x5a/0x60
>> [ 1455.349350] [<ffffffffa0389583>] rpcrdma_deregister_internal+0xb3/0xd0
>> [xprtrdma]
>> [ 1455.349350] [<ffffffffa038a639>] rpcrdma_buffer_destroy+0x69/0x170
>> [xprtrdma]
>> [ 1455.349350] [<ffffffffa03872ff>] xprt_rdma_destroy+0x3f/0xb0 [xprtrdma]
>> [ 1455.349350] [<ffffffffa04a95ff>] xprt_destroy+0x6f/0x80 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a9625>] xprt_put+0x15/0x20 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a899a>] rpc_free_client+0x8a/0xe0 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a8a58>] rpc_release_client+0x68/0xa0 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a9060>] rpc_shutdown_client+0xb0/0xc0 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a8f5d>] ? rpc_ping+0x5d/0x70 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a91ab>] rpc_create_xprt+0xbb/0xd0 [sunrpc]
>> [ 1455.349350] [<ffffffffa04a9273>] rpc_create+0xb3/0x160 [sunrpc]
>> [ 1455.349350] [<ffffffff81129749>] ? __probe_kernel_read+0x69/0xb0
>> [ 1455.349350] [<ffffffffa053851c>] nfs_create_rpc_client+0xdc/0x100 [nfs]
>> [ 1455.349350] [<ffffffffa0538cfa>] nfs_init_client+0x3a/0x90 [nfs]
>> [ 1455.349350] [<ffffffffa05391c8>] nfs_get_client+0x478/0x5b0 [nfs]
>> [ 1455.349350] [<ffffffffa0538e50>] ? nfs_get_client+0x100/0x5b0 [nfs]
>> [ 1455.349350] [<ffffffff81172c6d>] ? kmem_cache_alloc_trace+0x24d/0x260
>> [ 1455.349350] [<ffffffffa05393f3>] nfs_create_server+0xf3/0x4c0 [nfs]
>> [ 1455.349350] [<ffffffffa0545ff0>] ? nfs_request_mount+0xf0/0x1a0 [nfs]
>> [ 1455.349350] [<ffffffffa031c0c3>] nfs3_create_server+0x13/0x30 [nfsv3]
>> [ 1455.349350] [<ffffffffa0546293>] nfs_try_mount+0x1f3/0x230 [nfs]
>> [ 1455.349350] [<ffffffff8108ea21>] ? get_parent_ip+0x11/0x50
>> [ 1455.349350] [<ffffffff812d6343>] ? __this_cpu_preempt_check+0x13/0x20
>> [ 1455.349350] [<ffffffff810d632b>] ? try_module_get+0x6b/0x190
>> [ 1455.349350] [<ffffffffa05449f7>] nfs_fs_mount+0x187/0x9d0 [nfs]
>> [ 1455.349350] [<ffffffffa0545940>] ? nfs_clone_super+0x140/0x140 [nfs]
>> [ 1455.349350] [<ffffffffa0543b20>] ? nfs_auth_info_match+0x40/0x40 [nfs]
>> [ 1455.349350] [<ffffffff8117e360>] mount_fs+0x20/0xe0
>> [ 1455.349350] [<ffffffff811a1c16>] vfs_kern_mount+0x76/0x160
>> [ 1455.349350] [<ffffffff811a29a8>] do_mount+0x428/0xae0
>> [ 1455.349350] [<ffffffff811a30f0>] SyS_mount+0x90/0xe0
>> [ 1455.349350] [<ffffffff8152af52>] system_call_fastpath+0x16/0x1b
>> [ 1455.349350] ---[ end trace f1f31572972e211d ]---
>>
>> Signed-off-by: Yan Burman <y...@mellanox.com>
>
> Thanks Yan! I've applied this to a bugfixes branch that I'll push out later
> today.
>
> Chuck - Should I add your "Reviewed By" from v1 to this version of the patch?
Yes, thanks!
>
> Anna
>
>> ---
>>
>> Changes from V1:
>> Removed curly braces
>>
>> net/sunrpc/xprtrdma/verbs.c | 3 +++
>> 1 files changed, 3 insertions(+), 0 deletions(-)
>>
>> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
>> index 13dbd1c..176dafc 100644
>> --- a/net/sunrpc/xprtrdma/verbs.c
>> +++ b/net/sunrpc/xprtrdma/verbs.c
>> @@ -1388,6 +1388,9 @@ rpcrdma_register_internal(struct rpcrdma_ia *ia, void
>> *va, int len,
>> */
>> iov->addr = ib_dma_map_single(ia->ri_id->device,
>> va, len, DMA_BIDIRECTIONAL);
>> + if (ib_dma_mapping_error(ia->ri_id->device, iov->addr))
>> + return -ENOMEM;
>> +
>> iov->length = len;
>>
>> if (ia->ri_have_dma_lkey) {
>
--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com
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