From: Lorenzo Bianconi Date: Mon, 5 Jan 2026 08:43:31 +0000 (+0100) Subject: net: airoha: Fix schedule while atomic in airoha_ppe_deinit() X-Git-Tag: v6.19-rc5~29^2~11 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6abcf751bc084804a9e5b3051442e8a2ce67f48a;p=thirdparty%2Fkernel%2Flinux.git net: airoha: Fix schedule while atomic in airoha_ppe_deinit() airoha_ppe_deinit() runs airoha_npu_ppe_deinit() in atomic context. airoha_npu_ppe_deinit routine allocates ppe_data buffer with GFP_KERNEL flag. Rely on rcu_replace_pointer in airoha_ppe_deinit routine in order to fix schedule while atomic issue in airoha_npu_ppe_deinit() since we do not need atomic context there. Fixes: 00a7678310fe3 ("net: airoha: Introduce flowtable offload support") Signed-off-by: Lorenzo Bianconi Link: https://patch.msgid.link/20260105-airoha-fw-ethtool-v2-1-3b32b158cc31@kernel.org Signed-off-by: Paolo Abeni --- diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c index 0caabb0c3aa0..2221bafaf7c9 100644 --- a/drivers/net/ethernet/airoha/airoha_ppe.c +++ b/drivers/net/ethernet/airoha/airoha_ppe.c @@ -1547,13 +1547,16 @@ void airoha_ppe_deinit(struct airoha_eth *eth) { struct airoha_npu *npu; - rcu_read_lock(); - npu = rcu_dereference(eth->npu); + mutex_lock(&flow_offload_mutex); + + npu = rcu_replace_pointer(eth->npu, NULL, + lockdep_is_held(&flow_offload_mutex)); if (npu) { npu->ops.ppe_deinit(npu); airoha_npu_put(npu); } - rcu_read_unlock(); + + mutex_unlock(&flow_offload_mutex); rhashtable_destroy(ð->ppe->l2_flows); rhashtable_destroy(ð->flow_table);