sparc: Use GFP_ATOMIC in ldc_alloc_exp_dring() as it can be called in softirq context

Since it is possible for vnet_event_napi to end up doing
vnet_control_pkt_engine -> ... -> vnet_send_attr ->
vnet_port_alloc_tx_ring -> ldc_alloc_exp_dring -> kzalloc()
(i.e., in softirq context), kzalloc() should be called with
GFP_ATOMIC from ldc_alloc_exp_dring.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index d2ae0f7..7d3ca30 100644 (file)
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -2290,7 +2290,7 @@ void *ldc_alloc_exp_dring(struct ldc_channel *lp, unsigned int len,
        if (len & (8UL - 1))
                return ERR_PTR(-EINVAL);
 
-       buf = kzalloc(len, GFP_KERNEL);
+       buf = kzalloc(len, GFP_ATOMIC);
        if (!buf)
                return ERR_PTR(-ENOMEM);