5.4-stable review patch. If anyone has any objections, please let me know.
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From: Jinjie Ruan ruanjinjie@huawei.com
[ 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@bootlin.com Signed-off-by: Jinjie Ruan ruanjinjie@huawei.com Link: https://lore.kernel.org/20240911094234.1922418-1-ruanjinjie@huawei.com Signed-off-by: Stefan Schmidt stefan@datenfreihafen.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ieee802154/mcr20a.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
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");