This is a note to let you know that I've just added the patch titled
net: ieee802154: mcr20a: Use IRQF_NO_AUTOEN flag in request_irq()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ieee802154-mcr20a-use-irqf_no_autoen-flag-in-req.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3a5aba66c7f4083006817c1e541795fcb2f1b2fc
Author: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Date: Wed Sep 11 17:42:34 2024 +0800
net: ieee802154: mcr20a: Use IRQF_NO_AUTOEN flag in request_irq()
[ Upstream commit 09573b1cc76e7ff8f056ab29ea1cdc152ec8c653 ]
disable_irq() after request_irq() still has a time gap in which
interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will
disable IRQ auto-enable when request IRQ.
Fixes: 8c6ad9cc5157 ("ieee802154: Add NXP MCR20A IEEE 802.15.4 transceiver driver")
Reviewed-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Link: https://lore.kernel.org/20240911094234.1922418-1-ruanjinjie@xxxxxxxxxx
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ieee802154/mcr20a.c b/drivers/net/ieee802154/mcr20a.c
index 383231b854642..16474990dc01e 100644
--- a/drivers/net/ieee802154/mcr20a.c
+++ b/drivers/net/ieee802154/mcr20a.c
@@ -1311,16 +1311,13 @@ mcr20a_probe(struct spi_device *spi)
irq_type = IRQF_TRIGGER_FALLING;
ret = devm_request_irq(&spi->dev, spi->irq, mcr20a_irq_isr,
- irq_type, dev_name(&spi->dev), lp);
+ irq_type | IRQF_NO_AUTOEN, dev_name(&spi->dev), lp);
if (ret) {
dev_err(&spi->dev, "could not request_irq for mcr20a\n");
ret = -ENODEV;
goto free_dev;
}
- /* disable_irq by default and wait for starting hardware */
- disable_irq(spi->irq);
-
ret = ieee802154_register_hw(hw);
if (ret) {
dev_crit(&spi->dev, "ieee802154_register_hw failed\n");
