Atomic operations should be employed within rwlock, hence GFP_ATOMIC
is utilized instead of GFP_KERNEL. This ensures the avoidance of the
subsequent call trace and prevents potential misinterpretation of NPU
performance degradation during testing.
BUG: sleeping function called from invalid context at
include/linux/sched/mm.h:274
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 529, name: python3
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
Preemption disabled at:
[<ffffffc008cbe384>] ethosu_rpmsg_register+0x24/0x64
CPU: 1 PID: 529 Comm: python3 Tainted: G C
6.1.90-yocto-standard #1
Hardware name: NXP i.MX93 11X11 EVK board (DT)
Call trace:
dump_backtrace.part.0+0xc8/0xd4
show_stack+0x20/0x30
dump_stack_lvl+0x6c/0x88
dump_stack+0x18/0x34
__might_resched+0x154/0x1c0
__might_sleep+0x54/0xa4
kmem_cache_alloc+0x458/0x630
radix_tree_node_alloc.constprop.0+0x54/0x110
idr_get_free+0x22c/0x2b0
idr_alloc_u32+0x70/0x100
idr_alloc_cyclic+0x6c/0xf0
ethosu_rpmsg_register+0x3c/0x64
ethosu_inference_create+0xc0/0x2a4
ethosu_network_ioctl+0xd4/0x2a0
__arm64_sys_ioctl+0xb4/0x100
Signed-off-by: Xiaolei Wang <xiaolei.w...@windriver.com>
---
drivers/staging/ethosu/ethosu_rpmsg.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/ethosu/ethosu_rpmsg.c
b/drivers/staging/ethosu/ethosu_rpmsg.c
index d3e597e82762..f2ab3b366de7 100644
--- a/drivers/staging/ethosu/ethosu_rpmsg.c
+++ b/drivers/staging/ethosu/ethosu_rpmsg.c
@@ -36,7 +36,7 @@ int ethosu_rpmsg_register(struct ethosu_rpmsg *erp,
struct ethosu_rpmsg_msg *msg)
{
write_lock(&erp->lock);
- msg->id = idr_alloc_cyclic(&erp->msg_idr, msg, 0, INT_MAX, GFP_KERNEL);
+ msg->id = idr_alloc_cyclic(&erp->msg_idr, msg, 0, INT_MAX, GFP_ATOMIC);
write_unlock(&erp->lock);
if (msg->id < 0)
return msg->id;
--
2.25.1
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