Hi Bernard,
If I try to associate the ib_srpt driver with the siw driver the
complaint shown below appears on the console. In iw_cm_listen() I
found the following:
[ ... ]
spin_lock_irqsave(&cm_id_priv->lock, flags);
switch (cm_id_priv->state) {
case IW_CM_STATE_IDLE:
cm_id_priv->state = IW_CM_STATE_LISTEN;
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
ret = iw_cm_map(cm_id, false);
if (!ret)
ret = cm_id->device->ops.iw_create_listen(cm_id,
backlog);
if (ret)
cm_id_priv->state = IW_CM_STATE_IDLE;
spin_lock_irqsave(&cm_id_priv->lock, flags);
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&cm_id_priv->lock, flags);
[ ... ]
So it surprises me that siw_listen_address() calls a function that
can sleep. Do you think this is a correct analysis of the call trace
shown below?
Thanks,
Bart.
Target_Core_ConfigFS: REGISTER -> Allocated Fabric: srpt
iwpm_register_pid: Unable to send a nlmsg (client = 2)
BUG: sleeping function called from invalid context at mm/slab.h:501
in_atomic(): 1, irqs_disabled(): 0, pid: 1097, name: restart-lio-srp
4 locks held by restart-lio-srp/1097:
#0: 0000000083aba319 (sb_writers#11){.+.+}, at: vfs_write+0x24a/0x2c0
#1: 00000000dc6d2df5 (&buffer->mutex){+.+.}, at: configfs_write_file+0x4e/0x1d0 [configfs]
#2: 000000004db62204 (lock#7){+.+.}, at: rdma_listen+0x34c/0x450 [rdma_cm]
#3: 00000000ca45d89f (&ndev->lock){++--}, at: siw_create_listen+0x1d1/0x8b0 [siw]
Preemption disabled at:
[<ffffffffa0db6071>] siw_create_listen+0x1d1/0x8b0 [siw]
CPU: 0 PID: 1097 Comm: restart-lio-srp Not tainted 5.3.0-rc5-dbg+ #2
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
Call Trace:
dump_stack+0x8a/0xd6
___might_sleep.cold+0x128/0x139
__might_sleep+0x76/0xe0
kmem_cache_alloc+0x2b4/0x3a0
sock_alloc_inode+0x20/0xf0
alloc_inode+0x34/0xe0
new_inode_pseudo+0x17/0x90
sock_alloc+0x2f/0x110
__sock_create+0x61/0x360
sock_create+0x5f/0x70
siw_listen_address+0xbe/0x630 [siw]
siw_create_listen+0x2f5/0x8b0 [siw]
iw_cm_listen+0xd9/0x110 [iw_cm]
rdma_listen+0x32e/0x450 [rdma_cm]
cma_listen_on_dev+0x276/0x290 [rdma_cm]
rdma_listen+0x3c7/0x450 [rdma_cm]
srpt_create_rdma_id+0xc8/0x120 [ib_srpt]
srpt_rdma_cm_port_store+0x1a0/0x1f0 [ib_srpt]
configfs_write_file+0x15c/0x1d0 [configfs]
__vfs_write+0x4c/0x90
vfs_write+0x145/0x2c0
ksys_write+0xd7/0x180
__x64_sys_write+0x47/0x50
do_syscall_64+0x75/0x280
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[...]
siw: device registration error -23
