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net: qcom/emac: claim the irq only when the device is opened 

During reset, functions emac_mac_down() and emac_mac_up() are called,
so we don't want to free and claim the IRQ unnecessarily.  Move those
operations to open/close.

Signed-off-by: Timur Tabi <timur@codeaurora.org>
Reviewed-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Timur Tabi 2017-01-20 17:21:04 -06:00 committed by David S. Miller
parent 41c1093f2e
commit 4404323c6a
3 changed files with 11 additions and 14 deletions
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13
drivers/net/ethernet/qualcomm/emac/emac-mac.c
View File

@ -314,8 +314,6 @@ struct emac_skb_cb {
RX_PKT_INT2 |\
RX_PKT_INT3)
#define EMAC_MAC_IRQ_RES "core0"
void emac_mac_multicast_addr_set(struct emac_adapter *adpt, u8 *addr)
{
u32 crc32, bit, reg, mta;
@ -977,26 +975,16 @@ static void emac_adjust_link(struct net_device *netdev)
int emac_mac_up(struct emac_adapter *adpt)
{
struct net_device *netdev = adpt->netdev;
struct emac_irq *irq = &adpt->irq;
int ret;
emac_mac_rx_tx_ring_reset_all(adpt);
emac_mac_config(adpt);
ret = request_irq(irq->irq, emac_isr, 0, EMAC_MAC_IRQ_RES, irq);
if (ret) {
netdev_err(adpt->netdev, "could not request %s irq\n",
EMAC_MAC_IRQ_RES);
return ret;
}
emac_mac_rx_descs_refill(adpt, &adpt->rx_q);
ret = phy_connect_direct(netdev, adpt->phydev, emac_adjust_link,
PHY_INTERFACE_MODE_SGMII);
if (ret) {
netdev_err(adpt->netdev, "could not connect phy\n");
free_irq(irq->irq, irq);
return ret;
}
@ -1030,7 +1018,6 @@ void emac_mac_down(struct emac_adapter *adpt)
writel(DIS_INT, adpt->base + EMAC_INT_STATUS);
writel(0, adpt->base + EMAC_INT_MASK);
synchronize_irq(adpt->irq.irq);
free_irq(adpt->irq.irq, &adpt->irq);
phy_disconnect(adpt->phydev);

11
drivers/net/ethernet/qualcomm/emac/emac.c
View File

@ -256,18 +256,27 @@ static int emac_change_mtu(struct net_device *netdev, int new_mtu)
static int emac_open(struct net_device *netdev)
{
struct emac_adapter *adpt = netdev_priv(netdev);
struct emac_irq *irq = &adpt->irq;
int ret;
ret = request_irq(irq->irq, emac_isr, 0, "emac-core0", irq);
if (ret) {
netdev_err(adpt->netdev, "could not request emac-core0 irq\n");
return ret;
}
/* allocate rx/tx dma buffer & descriptors */
ret = emac_mac_rx_tx_rings_alloc_all(adpt);
if (ret) {
netdev_err(adpt->netdev, "error allocating rx/tx rings\n");
free_irq(irq->irq, irq);
return ret;
}
ret = emac_mac_up(adpt);
if (ret) {
emac_mac_rx_tx_rings_free_all(adpt);
free_irq(irq->irq, irq);
return ret;
}
@ -286,6 +295,8 @@ static int emac_close(struct net_device *netdev)
emac_mac_down(adpt);
emac_mac_rx_tx_rings_free_all(adpt);
free_irq(adpt->irq.irq, &adpt->irq);
mutex_unlock(&adpt->reset_lock);
return 0;

1
drivers/net/ethernet/qualcomm/emac/emac.h
View File

@ -331,7 +331,6 @@ struct emac_adapter {
int emac_reinit_locked(struct emac_adapter *adpt);
void emac_reg_update32(void __iomem *addr, u32 mask, u32 val);
irqreturn_t emac_isr(int irq, void *data);
void emac_set_ethtool_ops(struct net_device *netdev);
void emac_update_hw_stats(struct emac_adapter *adpt);