From: Edward Cree <ecree@solarflare.com>
Date: Tue, 18 Aug 2020 13:44:50 +0100
Subject: sfc: don't free_irq()s if they were never requested
Patch-mainline: v5.9-rc2
Git-commit: e6a43910d55d09dae65772ad571d4c61e459b17a
References: jsc#SLE-16683
If efx_nic_init_interrupt fails, or was never run (e.g. due to an earlier
failure in ef100_net_open), freeing irqs in efx_nic_fini_interrupt is not
needed and will cause error messages and stack traces.
So instead, only do this if efx_nic_init_interrupt successfully completed,
as indicated by the new efx->irqs_hooked flag.
Fixes: 965b549f3c20 ("sfc_ef100: implement ndo_open/close and EVQ probing")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sfc/net_driver.h | 2 ++
drivers/net/ethernet/sfc/nic.c | 4 ++++
2 files changed, 6 insertions(+)
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -846,6 +846,7 @@ struct efx_async_filter_insertion {
* @timer_quantum_ns: Interrupt timer quantum, in nanoseconds
* @timer_max_ns: Interrupt timer maximum value, in nanoseconds
* @irq_rx_adaptive: Adaptive IRQ moderation enabled for RX event queues
+ * @irqs_hooked: Channel interrupts are hooked
* @irq_rx_mod_step_us: Step size for IRQ moderation for RX event queues
* @irq_rx_moderation_us: IRQ moderation time for RX event queues
* @msg_enable: Log message enable flags
@@ -1004,6 +1005,7 @@ struct efx_nic {
unsigned int timer_quantum_ns;
unsigned int timer_max_ns;
bool irq_rx_adaptive;
+ bool irqs_hooked;
unsigned int irq_mod_step_us;
unsigned int irq_rx_moderation_us;
u32 msg_enable;
--- a/drivers/net/ethernet/sfc/nic.c
+++ b/drivers/net/ethernet/sfc/nic.c
@@ -129,6 +129,7 @@ int efx_nic_init_interrupt(struct efx_ni
#endif
}
+ efx->irqs_hooked = true;
return 0;
fail2:
@@ -154,6 +155,8 @@ void efx_nic_fini_interrupt(struct efx_n
efx->net_dev->rx_cpu_rmap = NULL;
#endif
+ if (!efx->irqs_hooked)
+ return;
if (EFX_INT_MODE_USE_MSI(efx)) {
/* Disable MSI/MSI-X interrupts */
efx_for_each_channel(channel, efx)
@@ -163,6 +166,7 @@ void efx_nic_fini_interrupt(struct efx_n
/* Disable legacy interrupt */
free_irq(efx->legacy_irq, efx);
}
+ efx->irqs_hooked = false;
}
/* Register dump */