netdev - [Patch 2.6.24 1/1]S2io: Fixed synchronization between scheduling of napi with card reset and close

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-next>] [day] [month] [year] [list]

Date:	Mon, 14 Jan 2008 20:23:04 -0500 (EST)
From:	Sreenivasa Honnur <Sreenivasa.Honnur@...erion.com>
To:	netdev@...r.kernel.org, jeff@...zik.org
cc:	support@...erion.com
Subject: [Patch 2.6.24 1/1]S2io: Fixed synchronization between scheduling of
 napi with card reset and close

- Fixed synchronization between scheduling of napi with card reset and close 
  by moving the enabling and disabling of napi to card up and card down 
  functions respectively instead of open and close.

Signed-off-by: Surjit Reang <surjit.reang@...erion.com>
Signed-off-by: Ramkrishna Vepa <ram.vepa@...erion.com>
---
diff -Nurp 2-0-26-10/drivers/net/s2io.c 2-0-26-17/drivers/net/s2io.c
--- 2-0-26-10/drivers/net/s2io.c	2008-01-10 01:33:53.000000000 +0530
+++ 2-0-26-17/drivers/net/s2io.c	2008-01-10 04:39:15.000000000 +0530
@@ -84,7 +84,7 @@
 #include "s2io.h"
 #include "s2io-regs.h"
 
-#define DRV_VERSION "2.0.26.10"
+#define DRV_VERSION "2.0.26.17"
 
 /* S2io Driver name & version. */
 static char s2io_driver_name[] = "Neterion";
@@ -3851,8 +3851,6 @@ static int s2io_open(struct net_device *
 	netif_carrier_off(dev);
 	sp->last_link_state = 0;
 
-	napi_enable(&sp->napi);
-
 	if (sp->config.intr_type == MSI_X) {
 		int ret = s2io_enable_msi_x(sp);
 
@@ -3895,7 +3893,6 @@ static int s2io_open(struct net_device *
 	return 0;
 
 hw_init_failed:
-	napi_disable(&sp->napi);
 	if (sp->config.intr_type == MSI_X) {
 		if (sp->entries) {
 			kfree(sp->entries);
@@ -3935,7 +3932,6 @@ static int s2io_close(struct net_device 
 		return 0;
 
 	netif_stop_queue(dev);
-	napi_disable(&sp->napi);
 	/* Reset card, kill tasklet and free Tx and Rx buffers. */
 	s2io_card_down(sp);
 
@@ -6799,6 +6795,8 @@ static void do_s2io_card_down(struct s2i
 	struct XENA_dev_config __iomem *bar0 = sp->bar0;
 	unsigned long flags;
 	register u64 val64 = 0;
+	struct config_param *config;
+	config = &sp->config;
 
 	if (!is_s2io_card_up(sp))
 		return;
@@ -6810,6 +6808,10 @@ static void do_s2io_card_down(struct s2i
 	}
 	clear_bit(__S2IO_STATE_CARD_UP, &sp->state);
 
+	/* Disable napi */
+	if (config->napi)
+		napi_disable(&sp->napi);
+
 	/* disable Tx and Rx traffic on the NIC */
 	if (do_io)
 		stop_nic(sp);
@@ -6903,6 +6905,11 @@ static int s2io_card_up(struct s2io_nic 
 		DBG_PRINT(INFO_DBG, "Buf in ring:%d is %d:\n", i,
 			  atomic_read(&sp->rx_bufs_left[i]));
 	}
+
+	/* Initialise napi */
+	if (config->napi)
+		napi_enable(&sp->napi);
+
 	/* Maintain the state prior to the open */
 	if (sp->promisc_flg)
 		sp->promisc_flg = 0;

--
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