[PATCH 5.4 152/177] gve: Check TX QPL was actually assigned

From: Greg Kroah-Hartman
Date: Mon May 31 2021 - 11:48:24 EST


From: Catherine Sullivan <csully@xxxxxxxxxx>

[ Upstream commit 5aec55b46c6238506cdf0c60cd0e42ab77a1e5e0 ]

Correctly check the TX QPL was assigned and unassigned if
other steps in the allocation fail.

Fixes: f5cedc84a30d (gve: Add transmit and receive support)
Signed-off-by: Catherine Sullivan <csully@xxxxxxxxxx>
Signed-off-by: David Awogbemila <awogbemila@xxxxxxxxxx>
Acked-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/google/gve/gve_tx.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_tx.c b/drivers/net/ethernet/google/gve/gve_tx.c
index d0244feb0301..30532ee28dd3 100644
--- a/drivers/net/ethernet/google/gve/gve_tx.c
+++ b/drivers/net/ethernet/google/gve/gve_tx.c
@@ -207,10 +207,12 @@ static int gve_tx_alloc_ring(struct gve_priv *priv, int idx)
goto abort_with_info;

tx->tx_fifo.qpl = gve_assign_tx_qpl(priv);
+ if (!tx->tx_fifo.qpl)
+ goto abort_with_desc;

/* map Tx FIFO */
if (gve_tx_fifo_init(priv, &tx->tx_fifo))
- goto abort_with_desc;
+ goto abort_with_qpl;

tx->q_resources =
dma_alloc_coherent(hdev,
@@ -229,6 +231,8 @@ static int gve_tx_alloc_ring(struct gve_priv *priv, int idx)

abort_with_fifo:
gve_tx_fifo_release(priv, &tx->tx_fifo);
+abort_with_qpl:
+ gve_unassign_qpl(priv, tx->tx_fifo.qpl->id);
abort_with_desc:
dma_free_coherent(hdev, bytes, tx->desc, tx->bus);
tx->desc = NULL;
--
2.30.2