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:ch0:rx_be) vs. 00000000
(ravb e6800000.ethernet eth0: cannot request IRQ eth0:ch0:rx_be
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 any of the
R-Car Gen3-specific secondary IRQs.
Add the missing free_irq() calls to fix this.
Fixes: f51bdc236b6c5835 ("ravb: Add dma queue interrupt support")
Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be>
Acked-by: Sergei Shtylyov <sergei.shtyl...@cogentembedded.com>
---
This version is against today's net-next.git.
v3:
- Add Acked-by,
- Rebase against net-next.git, which has received a partial fix
through net.git,
v2:
- Clearly state which version this patch is against,
- Add Fixes tags.
---
drivers/net/ethernet/renesas/ravb_main.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c
b/drivers/net/ethernet/renesas/ravb_main.c
index bcebafd780234f96..867caf6e7a5a65ad 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1667,8 +1667,13 @@ static int ravb_close(struct net_device *ndev)
priv->phydev = NULL;
}
- if (priv->chip_id == RCAR_GEN3)
+ if (priv->chip_id != RCAR_GEN2) {
+ free_irq(priv->tx_irqs[RAVB_NC], ndev);
+ free_irq(priv->rx_irqs[RAVB_NC], ndev);
+ free_irq(priv->tx_irqs[RAVB_BE], ndev);
+ free_irq(priv->rx_irqs[RAVB_BE], ndev);
free_irq(priv->emac_irq, ndev);
+ }
free_irq(ndev->irq, ndev);
napi_disable(&priv->napi[RAVB_NC]);
--
1.9.1
