sgi-xpc: Use GFP_ATOMIC for kmalloc in atomic context.
xpc_send_activate_IRQ_uv is called from
<-xpc_send_activate_IRQ_part_uv
<-xpc_indicate_partition_disengaged_uv
(xpc_arch_ops.indicate_partition_disengaged)
<-xpc_die_deactivate
<-xpc_system_die
xpc_system_die is registered by atomic_notifier_chain_register,
which indicates xpc_system_die may be called in atomic context.
So the kmalloc in xpc_send_activate_IRQ_uv may be in atomic context.
Use GFP_ATOMIC instead of GFP_KERNEL in kmalloc.
Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Link: https://lore.kernel.org/r/20190805125625.24963-1-huangfq.daxian@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
index 89c4b04..7f34b97 100644
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ b/drivers/misc/sgi-xp/xpc_uv.c
@@ -694,7 +694,7 @@ xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size,
if (gru_mq_desc == NULL) {
gru_mq_desc = kmalloc(sizeof(struct
gru_message_queue_desc),
- GFP_KERNEL);
+ GFP_ATOMIC);
if (gru_mq_desc == NULL) {
ret = xpNoMemory;
goto done;
