All of lore.kernel.org
 help / color / mirror / Atom feed
From: Marc Kleine-Budde <mkl@pengutronix.de>
To: linux-can@vger.kernel.org
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
	Thomas Kopp <thomas.kopp@microchip.com>,
	Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH 1/2] can: mcp251xfd: mcp251xfd_irq(): add missing can_rx_offload_threaded_irq_finish() in case of bus off
Date: Sat,  6 Nov 2021 21:15:25 +0100	[thread overview]
Message-ID: <20211106201526.44292-1-mkl@pengutronix.de> (raw)

The function can_rx_offload_threaded_irq_finish() is needed to trigger
the NAPI thread to deliver read CAN frames to the networking stack.

This patch adds the missing call to can_rx_offload_threaded_irq_finish()
in case of a bus off, before leaving the interrupt handler to avoid
packet starvation.

Fixes: 30bfec4fec59 ("can: rx-offload: can_rx_offload_threaded_irq_finish(): add new function to be called from threaded interrupt")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
index 673861ab665a..212fcd1554e4 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
@@ -2290,8 +2290,10 @@ static irqreturn_t mcp251xfd_irq(int irq, void *dev_id)
 			 * check will fail, too. So leave IRQ handler
 			 * directly.
 			 */
-			if (priv->can.state == CAN_STATE_BUS_OFF)
+			if (priv->can.state == CAN_STATE_BUS_OFF) {
+				can_rx_offload_threaded_irq_finish(&priv->offload);
 				return IRQ_HANDLED;
+			}
 		}
 
 		handled = IRQ_HANDLED;
-- 
2.33.0



             reply	other threads:[~2021-11-06 20:15 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-06 20:15 Marc Kleine-Budde [this message]
2021-11-06 20:15 ` [PATCH 2/2] can: mcp251xfd: mcp251xfd_chip_start(): fix error handling for mcp251xfd_chip_rx_int_enable() Marc Kleine-Budde

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20211106201526.44292-1-mkl@pengutronix.de \
    --to=mkl@pengutronix.de \
    --cc=linux-can@vger.kernel.org \
    --cc=manivannan.sadhasivam@linaro.org \
    --cc=thomas.kopp@microchip.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.