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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>
alistair/sunxi64-5.4-dsi
Fuqian Huang 2019-08-05 20:56:25 +08:00 committed by Greg Kroah-Hartman
parent cd010d9b98
commit 672a749b4d
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/sgi-xp/xpc_uv.c
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@ -694,7 +694,7 @@ again:
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;