5.4-stable review patch. If anyone has any objections, please let me know.
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From: Jinjie Ruan ruanjinjie@huawei.com
[ Upstream commit daaba19d357f0900b303a530ced96c78086267ea ]
disable_irq() after request_irq() still has a time gap in which interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will disable IRQ auto-enable when request IRQ.
Reviewed-by: Louis Peens louis.peens@corigine.com Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Link: https://patch.msgid.link/20240911094445.1922476-4-ruanjinjie@huawei.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c index 61aabffc8888d..7cbce8f51f069 100644 --- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c +++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c @@ -2626,8 +2626,8 @@ nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
snprintf(r_vec->name, sizeof(r_vec->name), "%s-rxtx-%d", nfp_net_name(nn), idx); - err = request_irq(r_vec->irq_vector, r_vec->handler, 0, r_vec->name, - r_vec); + err = request_irq(r_vec->irq_vector, r_vec->handler, IRQF_NO_AUTOEN, + r_vec->name, r_vec); if (err) { if (nn->dp.netdev) netif_napi_del(&r_vec->napi); @@ -2637,7 +2637,6 @@ nfp_net_prepare_vector(struct nfp_net *nn, struct nfp_net_r_vector *r_vec, nn_err(nn, "Error requesting IRQ %d\n", r_vec->irq_vector); return err; } - disable_irq(r_vec->irq_vector);
irq_set_affinity_hint(r_vec->irq_vector, &r_vec->affinity_mask);