linux-kernel - [PATCH 5.18 015/112] can: mcp251xfd: mcp251xfd_stop(): add missing hrtimer

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Date:   Mon, 11 Jul 2022 11:06:15 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 5.18 015/112] can: mcp251xfd: mcp251xfd_stop(): add missing hrtimer_cancel()

From: Marc Kleine-Budde <mkl@...gutronix.de>

commit d5a972f561a003e302e4267340c57e8fbd096fa4 upstream.

In commit 169d00a25658 ("can: mcp251xfd: add TX IRQ coalescing
support") software based TX coalescing was added to the driver. The
key idea is to keep the TX complete IRQ disabled for some time after
processing it and re-enable later by a hrtimer. When bringing the
interface down, this timer has to be stopped.

Add the missing hrtimer_cancel() of the tx_irq_time hrtimer to
mcp251xfd_stop().

Link: https://lore.kernel.org/all/20220620143942.891811-1-mkl@pengutronix.de
Fixes: 169d00a25658 ("can: mcp251xfd: add TX IRQ coalescing support")
Cc: stable@...r.kernel.org # v5.18
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
@@ -1641,6 +1641,7 @@ static int mcp251xfd_stop(struct net_dev
 	netif_stop_queue(ndev);
 	set_bit(MCP251XFD_FLAGS_DOWN, priv->flags);
 	hrtimer_cancel(&priv->rx_irq_timer);
+	hrtimer_cancel(&priv->tx_irq_timer);
 	mcp251xfd_chip_interrupts_disable(priv);
 	free_irq(ndev->irq, priv);
 	can_rx_offload_disable(&priv->offload);