[PATCH net v2 1/3] gve: Correct available tx qpl check

Subsystems: networking drivers, the rest

STALE1778d

4 messages, 2 authors, 2021-10-06 · open the first message on its own page

[PATCH net v2 1/3] gve: Correct available tx qpl check

From: Jeroen de Borst <hidden>
Date: 2021-10-06 02:42:28

From: Catherine Sullivan <redacted>

The qpl_map_size is rounded up to a multiple of sizeof(long), but the
number of qpls doesn't have to be.

Fixes: f5cedc84a30d2 ("gve: Add transmit and receive support")
Signed-off-by: Catherine Sullivan <redacted>
Signed-off-by: Jeroen de Borst <redacted>
---
 drivers/net/ethernet/google/gve/gve.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h
index 1d3188e8e3b3..92dc18a4bcc4 100644
--- a/drivers/net/ethernet/google/gve/gve.h
+++ b/drivers/net/ethernet/google/gve/gve.h

@@ -780,7 +780,7 @@ struct gve_queue_page_list *gve_assign_rx_qpl(struct gve_priv *priv)
 				    gve_num_tx_qpls(priv));
 
 	/* we are out of rx qpls */
-	if (id == priv->qpl_cfg.qpl_map_size)
+	if (id == gve_num_tx_qpls(priv) + gve_num_rx_qpls(priv))
 		return NULL;
 
 	set_bit(id, priv->qpl_cfg.qpl_id_map);

-- 
2.33.0.800.g4c38ced690-goog

v2: Removed empty line between Fixes and the other tags.

[PATCH net v2 2/3] gve: Avoid freeing NULL pointer

From: Jeroen de Borst <hidden>
Date: 2021-10-06 02:42:42

From: Tao Liu <redacted>

Prevent possible crashes when cleaning up after unsuccessful
initializations.

Fixes: 893ce44df5658 ("gve: Add basic driver framework for Compute Engine Virtual NIC")
Signed-off-by: Tao Liu <redacted>
Signed-off-by: Catherine Sully <redacted>
---
 drivers/net/ethernet/google/gve/gve_main.c | 27 ++++++++++++++--------
 1 file changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index 099a2bc5ae67..29c5f994f92e 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c

@@ -82,6 +82,9 @@ static int gve_alloc_counter_array(struct gve_priv *priv)
 
 static void gve_free_counter_array(struct gve_priv *priv)
 {
+	if (!priv->counter_array)
+		return;
+
 	dma_free_coherent(&priv->pdev->dev,
 			  priv->num_event_counters *
 			  sizeof(*priv->counter_array),

@@ -142,6 +145,9 @@ static int gve_alloc_stats_report(struct gve_priv *priv)
 
 static void gve_free_stats_report(struct gve_priv *priv)
 {
+	if (!priv->stats_report)
+		return;
+
 	del_timer_sync(&priv->stats_report_timer);
 	dma_free_coherent(&priv->pdev->dev, priv->stats_report_len,
 			  priv->stats_report, priv->stats_report_bus);

@@ -370,18 +376,19 @@ static void gve_free_notify_blocks(struct gve_priv *priv)
 {
 	int i;
 
-	if (priv->msix_vectors) {
-		/* Free the irqs */
-		for (i = 0; i < priv->num_ntfy_blks; i++) {
-			struct gve_notify_block *block = &priv->ntfy_blocks[i];
-			int msix_idx = i;
+	if (!priv->msix_vectors)
+		return;
 
-			irq_set_affinity_hint(priv->msix_vectors[msix_idx].vector,
-					      NULL);
-			free_irq(priv->msix_vectors[msix_idx].vector, block);
-		}
-		free_irq(priv->msix_vectors[priv->mgmt_msix_idx].vector, priv);
+	/* Free the irqs */
+	for (i = 0; i < priv->num_ntfy_blks; i++) {
+		struct gve_notify_block *block = &priv->ntfy_blocks[i];
+		int msix_idx = i;
+
+		irq_set_affinity_hint(priv->msix_vectors[msix_idx].vector,
+				      NULL);
+		free_irq(priv->msix_vectors[msix_idx].vector, block);
 	}
+	free_irq(priv->msix_vectors[priv->mgmt_msix_idx].vector, priv);
 	dma_free_coherent(&priv->pdev->dev,
 			  priv->num_ntfy_blks * sizeof(*priv->ntfy_blocks),
 			  priv->ntfy_blocks, priv->ntfy_block_bus);

-- 
2.33.0.800.g4c38ced690-goog

v2: Removed empty line between Fixes and the other tags.

[PATCH net v2 3/3] gve: Properly handle errors in gve_assign_qpl

From: Jeroen de Borst <hidden>
Date: 2021-10-06 02:42:56

From: Catherine Sullivan <redacted>

Ignored errors would result in crash.

Fixes: ede3fcf5ec67f ("gve: Add support for raw addressing to the rx path")
Signed-off-by: Catherine Sullivan <redacted>
Signed-off-by: Jeroen de Borst <redacted>
---
 drivers/net/ethernet/google/gve/gve_rx.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c
index bb8261368250..94941d4e4744 100644
--- a/drivers/net/ethernet/google/gve/gve_rx.c
+++ b/drivers/net/ethernet/google/gve/gve_rx.c

@@ -104,8 +104,14 @@ static int gve_prefill_rx_pages(struct gve_rx_ring *rx)
 	if (!rx->data.page_info)
 		return -ENOMEM;
 
-	if (!rx->data.raw_addressing)
+	if (!rx->data.raw_addressing) {
 		rx->data.qpl = gve_assign_rx_qpl(priv);
+		if (!rx->data.qpl) {
+			kvfree(rx->data.page_info);
+			rx->data.page_info = NULL;
+			return -ENOMEM;
+		}
+	}
 	for (i = 0; i < slots; i++) {
 		if (!rx->data.raw_addressing) {
 			struct page *page = rx->data.qpl->pages[i];

-- 
2.33.0.800.g4c38ced690-goog

v2: Removed empty line between Fixes and other tags.

Re: [PATCH net v2 1/3] gve: Correct available tx qpl check

From: patchwork-bot+netdevbpf@kernel.org
Date: 2021-10-06 14:10:11

Hello:

This series was applied to netdev/net.git (refs/heads/master):

On Tue,  5 Oct 2021 19:42:19 -0700 you wrote:

From: Catherine Sullivan <redacted>

The qpl_map_size is rounded up to a multiple of sizeof(long), but the
number of qpls doesn't have to be.

Fixes: f5cedc84a30d2 ("gve: Add transmit and receive support")
Signed-off-by: Catherine Sullivan <redacted>
Signed-off-by: Jeroen de Borst <redacted>

[...]

Here is the summary with links:
  - [net,v2,1/3] gve: Correct available tx qpl check
    https://git.kernel.org/netdev/net/c/d03477ee10f4
  - [net,v2,2/3] gve: Avoid freeing NULL pointer
    https://git.kernel.org/netdev/net/c/922aa9bcac92
  - [net,v2,3/3] gve: Properly handle errors in gve_assign_qpl
    https://git.kernel.org/netdev/net/c/d4b111fda69a

You are awesome, thank you!
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