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authorBen Hutchings <bhutchings@solarflare.com>2009-04-15 01:39:03 +0100
committerChris Wright <chrisw@sous-sol.org>2009-04-27 10:37:01 -0700
commit926e66275ddb852a4a4686df9b6b0f760746c7a3 (patch)
tree1428aa80a492cf929cad2a226d32313813318b22
parent9feb2c00e5d5b267912846454d7d0c85b6abd434 (diff)
sfc: Match calls to netif_napi_add() and netif_napi_del()
upstream commit: 718cff1eec595ce6ab0635b8160a51ee37d9268d sfc could call netif_napi_add() multiple times for the same napi_struct, corrupting the list of napi_structs for the associated device and leading to a busy-loop on device removal. Move the call to netif_napi_add() and add a call to netif_napi_del() in the obvious places. [bhutchings: backport to 2.6.29] Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org>
-rw-r--r--drivers/net/sfc/efx.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index ab0e09bf154d..655e9b253ab0 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -424,10 +424,6 @@ static void efx_start_channel(struct efx_channel *channel)
EFX_LOG(channel->efx, "starting chan %d\n", channel->channel);
- if (!(channel->efx->net_dev->flags & IFF_UP))
- netif_napi_add(channel->napi_dev, &channel->napi_str,
- efx_poll, napi_weight);
-
/* The interrupt handler for this channel may set work_pending
* as soon as we enable it. Make sure it's cleared before
* then. Similarly, make sure it sees the enabled flag set. */
@@ -1273,6 +1269,8 @@ static int efx_init_napi(struct efx_nic *efx)
efx_for_each_channel(channel, efx) {
channel->napi_dev = efx->net_dev;
+ netif_napi_add(channel->napi_dev, &channel->napi_str,
+ efx_poll, napi_weight);
rc = efx_lro_init(&channel->lro_mgr, efx);
if (rc)
goto err;
@@ -1289,6 +1287,8 @@ static void efx_fini_napi(struct efx_nic *efx)
efx_for_each_channel(channel, efx) {
efx_lro_fini(&channel->lro_mgr);
+ if (channel->napi_dev)
+ netif_napi_del(&channel->napi_str);
channel->napi_dev = NULL;
}
}