netdev - [PATCH 3/14] ehea: Remove force_irq logic in napi poll routine

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 5 Apr 2011 21:30:55 +1000
From:	Anton Blanchard <anton@...ba.org>
To:	leitao@...ux.vnet.ibm.com
Cc:	netdev@...r.kernel.org, michael@...erman.id.au
Subject: [PATCH 3/14] ehea: Remove force_irq logic in napi poll routine


commit 18604c548545 (ehea: NAPI multi queue TX/RX path for SMP) added
driver specific logic for exiting napi mode. I'm not sure what it was
trying to solve and it should be up to the network stack to decide when
we are done polling so remove it.

Signed-off-by: Anton Blanchard <anton@...ba.org>
---

Index: linux-2.6/drivers/net/ehea/ehea_main.c
===================================================================
--- linux-2.6.orig/drivers/net/ehea/ehea_main.c	2011-03-21 09:44:15.792816780 +1100
+++ linux-2.6/drivers/net/ehea/ehea_main.c	2011-03-21 14:18:42.213238477 +1100
@@ -931,7 +931,6 @@ static struct ehea_cqe *ehea_proc_cqes(s
 	return cqe;
 }
 
-#define EHEA_NAPI_POLL_NUM_BEFORE_IRQ 16
 #define EHEA_POLL_MAX_CQES 65535
 
 static int ehea_poll(struct napi_struct *napi, int budget)
@@ -941,18 +940,13 @@ static int ehea_poll(struct napi_struct
 	struct net_device *dev = pr->port->netdev;
 	struct ehea_cqe *cqe;
 	struct ehea_cqe *cqe_skb = NULL;
-	int force_irq, wqe_index;
+	int wqe_index;
 	int rx = 0;
 
-	force_irq = (pr->poll_counter > EHEA_NAPI_POLL_NUM_BEFORE_IRQ);
 	cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES);
+	rx += ehea_proc_rwqes(dev, pr, budget - rx);
 
-	if (!force_irq)
-		rx += ehea_proc_rwqes(dev, pr, budget - rx);
-
-	while ((rx != budget) || force_irq) {
-		pr->poll_counter = 0;
-		force_irq = 0;
+	while ((rx != budget)) {
 		napi_complete(napi);
 		ehea_reset_cq_ep(pr->recv_cq);
 		ehea_reset_cq_ep(pr->send_cq);
@@ -972,7 +966,6 @@ static int ehea_poll(struct napi_struct
 		rx += ehea_proc_rwqes(dev, pr, budget - rx);
 	}
 
-	pr->poll_counter++;
 	return rx;
 }
 
Index: linux-2.6/drivers/net/ehea/ehea.h
===================================================================
--- linux-2.6.orig/drivers/net/ehea/ehea.h	2011-03-21 14:18:26.442655734 +1100
+++ linux-2.6/drivers/net/ehea/ehea.h	2011-03-21 14:18:33.252907379 +1100
@@ -383,7 +383,6 @@ struct ehea_port_res {
 	u64 tx_bytes;
 	u64 rx_packets;
 	u64 rx_bytes;
-	u32 poll_counter;
 	struct net_lro_mgr lro_mgr;
 	struct net_lro_desc lro_desc[MAX_LRO_DESCRIPTORS];
 	int sq_restart_flag;
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html