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 <yanb@xxxxxxxxxxxx> 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? 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) { -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html