5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
[ Upstream commit e2c85d85a05f16af2223fcc0195ff50a7938b372 ]
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: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller")
Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v4.19+
Acked-by: Mukesh Kumar Savaliya <quic_msavaliy@xxxxxxxxxxx>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@xxxxxxxxxx>
Signed-off-by: Andi Shyti <andi.shyti@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/i2c/busses/i2c-qcom-geni.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index e16c38fb37900..20fe16b1d4c83 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -571,15 +571,13 @@ static int geni_i2c_probe(struct platform_device *pdev)
init_completion(&gi2c->done);
spin_lock_init(&gi2c->lock);
platform_set_drvdata(pdev, gi2c);
- ret = devm_request_irq(dev, gi2c->irq, geni_i2c_irq, 0,
+ ret = devm_request_irq(dev, gi2c->irq, geni_i2c_irq, IRQF_NO_AUTOEN,
dev_name(dev), gi2c);
if (ret) {
dev_err(dev, "Request_irq failed:%d: err:%d\n",
gi2c->irq, ret);
return ret;
}
- /* Disable the interrupt so that the system can enter low-power mode */
- disable_irq(gi2c->irq);
i2c_set_adapdata(&gi2c->adap, gi2c);
gi2c->adap.dev.parent = dev;
gi2c->adap.dev.of_node = dev->of_node;
--
2.43.0
