From: Geert Uytterhoeven geert+renesas@glider.be
commit 7fa816b92c52e2c304f2ff6401e0d51e1d229ca5 upstream.
When reopening the network device on ra7795/salvator-x, e.g. after a DHCP timeout:
IP-Config: Reopening network devices... genirq: Flags mismatch irq 139. 00000000 (eth0:ch24:emac) vs. 00000000 (eth0:ch24:emac) ravb e6800000.ethernet eth0: cannot request IRQ eth0:ch24:emac IP-Config: Failed to open eth0 IP-Config: No network devices available
The "mismatch" is due to requesting an IRQ that is already in use, while IRQF_PROBE_SHARED wasn't set.
However, the real cause is that ravb_close() doesn't release the R-Car Gen3-specific secondary IRQ.
Add the missing free_irq() call to fix this.
Fixes: 22d4df8ff3a3cc72 ("ravb: Add support for r8a7795 SoC") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Acked-by: Sergei Shtylyov sergei.shtylyov@cogentembedded.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/ethernet/renesas/ravb_main.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1528,6 +1528,8 @@ static int ravb_close(struct net_device priv->phydev = NULL; }
+ if (priv->chip_id == RCAR_GEN3) + free_irq(priv->emac_irq, ndev); free_irq(ndev->irq, ndev);
napi_disable(&priv->napi[RAVB_NC]);