net: airoha: use int instead of atomic_t for qdma users counter

QDMA users counter is always accessed holding RTNL lock so we do not
require atomic_t for it.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/airoha/airoha_eth.c

@@ -1840,7 +1840,7 @@ static int airoha_dev_open(struct net_device *netdev)
 	airoha_qdma_set(qdma, REG_QDMA_GLOBAL_CFG,
 			GLOBAL_CFG_TX_DMA_EN_MASK |
 			GLOBAL_CFG_RX_DMA_EN_MASK);
-	atomic_inc(&qdma->users);
+	qdma->users++;
 
 	if (!airoha_is_lan_gdm_dev(dev) &&
 	    airoha_ppe_is_enabled(qdma->eth, 1))
@@ -1894,7 +1894,7 @@ static int airoha_dev_stop(struct net_device *netdev)
 					    REG_GDM_FWD_CFG(port->id),
 					    FE_PSE_PORT_DROP);
 
-	if (atomic_dec_and_test(&qdma->users)) {
+	if (!--qdma->users) {
 		airoha_qdma_clear(qdma, REG_QDMA_GLOBAL_CFG,
 				  GLOBAL_CFG_TX_DMA_EN_MASK |
 				  GLOBAL_CFG_RX_DMA_EN_MASK);

drivers/net/ethernet/airoha/airoha_eth.h

@@ -524,7 +524,7 @@ struct airoha_qdma {
 	struct airoha_eth *eth;
 	void __iomem *regs;
 
-	atomic_t users;
+	int users;
 
 	struct airoha_irq_bank irq_banks[AIROHA_MAX_NUM_IRQ_BANKS];