6.5-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gerhard Engleder <gerhard@xxxxxxxxxxxxxxxxxxxxx>
[ Upstream commit ea852c17f5382a0a52041cfbd9a4451ae0fa1a38 ]
According to the NAPI documentation networking/napi.rst, drivers which
have to mask interrupts explicitly should use the napi_schedule_prep()
and __napi_schedule() calls.
No problem seen so far with current implementation. Nevertheless, let's
align the implementation with documentation.
Signed-off-by: Gerhard Engleder <gerhard@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/engleder/tsnep_main.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/engleder/tsnep_main.c b/drivers/net/ethernet/engleder/tsnep_main.c
index 84751bb303a68..a83f8bceadd16 100644
--- a/drivers/net/ethernet/engleder/tsnep_main.c
+++ b/drivers/net/ethernet/engleder/tsnep_main.c
@@ -86,8 +86,11 @@ static irqreturn_t tsnep_irq(int irq, void *arg)
/* handle TX/RX queue 0 interrupt */
if ((active & adapter->queue[0].irq_mask) != 0) {
- tsnep_disable_irq(adapter, adapter->queue[0].irq_mask);
- napi_schedule(&adapter->queue[0].napi);
+ if (napi_schedule_prep(&adapter->queue[0].napi)) {
+ tsnep_disable_irq(adapter, adapter->queue[0].irq_mask);
+ /* schedule after masking to avoid races */
+ __napi_schedule(&adapter->queue[0].napi);
+ }
}
return IRQ_HANDLED;
@@ -98,8 +101,11 @@ static irqreturn_t tsnep_irq_txrx(int irq, void *arg)
struct tsnep_queue *queue = arg;
/* handle TX/RX queue interrupt */
- tsnep_disable_irq(queue->adapter, queue->irq_mask);
- napi_schedule(&queue->napi);
+ if (napi_schedule_prep(&queue->napi)) {
+ tsnep_disable_irq(queue->adapter, queue->irq_mask);
+ /* schedule after masking to avoid races */
+ __napi_schedule(&queue->napi);
+ }
return IRQ_HANDLED;
}
--
2.40.1
