diff mbox series

bcm63xx: fix Tx cleanup when NAPI poll budget is zero

Message ID 20220708080303.298-1-liew.s.piaw@gmail.com (mailing list archive)
State Accepted
Commit 10c8fd2f7a40d691062649307a2aba00dac5dbe6
Delegated to: Netdev Maintainers
Headers show
Series bcm63xx: fix Tx cleanup when NAPI poll budget is zero | expand

Checks

Context Check Description
netdev/tree_selection success Guessed tree name to be net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 5 maintainers not CCed: chenhao288@hisilicon.com linux-arm-kernel@lists.infradead.org pabeni@redhat.com edumazet@google.com tangmeng@uniontech.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 40 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Sieng-Piaw Liew July 8, 2022, 8:03 a.m. UTC 
NAPI poll() function may be passed a budget value of zero, i.e. during
netpoll, which isn't NAPI context.
Therefore, napi_consume_skb() must be given budget value instead of
!force to truly discern netpoll-like scenarios.

Fixes: c63c615e22eb ("bcm63xx_enet: switch to napi_build_skb() to reuse skbuff_heads")
Signed-off-by: Sieng-Piaw Liew <liew.s.piaw@gmail.com>
---
 drivers/net/ethernet/broadcom/bcm63xx_enet.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org July 11, 2022, 8:40 p.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Fri,  8 Jul 2022 16:03:03 +0800 you wrote:
> NAPI poll() function may be passed a budget value of zero, i.e. during
> netpoll, which isn't NAPI context.
> Therefore, napi_consume_skb() must be given budget value instead of
> !force to truly discern netpoll-like scenarios.
> 
> Fixes: c63c615e22eb ("bcm63xx_enet: switch to napi_build_skb() to reuse skbuff_heads")
> Signed-off-by: Sieng-Piaw Liew <liew.s.piaw@gmail.com>
> 
> [...]

Here is the summary with links:
  - bcm63xx: fix Tx cleanup when NAPI poll budget is zero
    https://git.kernel.org/netdev/net-next/c/10c8fd2f7a40

You are awesome, thank you!
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 514d61dd91c7..193dc1db0f4e 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -423,7 +423,7 @@  static int bcm_enet_receive_queue(struct net_device *dev, int budget)
 /*
  * try to or force reclaim of transmitted buffers
  */
-static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
+static int bcm_enet_tx_reclaim(struct net_device *dev, int force, int budget)
 {
 	struct bcm_enet_priv *priv;
 	unsigned int bytes;
@@ -468,7 +468,7 @@  static int bcm_enet_tx_reclaim(struct net_device *dev, int force)
 			dev->stats.tx_errors++;
 
 		bytes += skb->len;
-		napi_consume_skb(skb, !force);
+		napi_consume_skb(skb, budget);
 		released++;
 	}
 
@@ -499,7 +499,7 @@  static int bcm_enet_poll(struct napi_struct *napi, int budget)
 			 ENETDMAC_IR, priv->tx_chan);
 
 	/* reclaim sent skb */
-	bcm_enet_tx_reclaim(dev, 0);
+	bcm_enet_tx_reclaim(dev, 0, budget);
 
 	spin_lock(&priv->rx_lock);
 	rx_work_done = bcm_enet_receive_queue(dev, budget);
@@ -1211,7 +1211,7 @@  static int bcm_enet_stop(struct net_device *dev)
 	bcm_enet_disable_mac(priv);
 
 	/* force reclaim of all tx buffers */
-	bcm_enet_tx_reclaim(dev, 1);
+	bcm_enet_tx_reclaim(dev, 1, 0);
 
 	/* free the rx buffer ring */
 	bcm_enet_free_rx_buf_ring(kdev, priv);
@@ -2362,7 +2362,7 @@  static int bcm_enetsw_stop(struct net_device *dev)
 	bcm_enet_disable_dma(priv, priv->rx_chan);
 
 	/* force reclaim of all tx buffers */
-	bcm_enet_tx_reclaim(dev, 1);
+	bcm_enet_tx_reclaim(dev, 1, 0);
 
 	/* free the rx buffer ring */
 	bcm_enet_free_rx_buf_ring(kdev, priv);