Commit 97e1a530 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Greg Kroah-Hartman
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slimbus: qcom-ngd-ctrl: check for device runtime PM status during ISR 



Slimbus core interrupt is getting fired after suspend. At this point
ADSP slimbus hardware is off with gated clocks which is leading to an
unclocked access when HLOS slimbus tried to read the interrupt
status register in the ISR.

Co-developed-by: default avatarChandana Kishori Chiluveru <cchiluve@codeaurora.org>
Signed-off-by: default avatarChandana Kishori Chiluveru <cchiluve@codeaurora.org>
Signed-off-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-2-srinivas.kandagatla@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ce9c0b06

drivers/slimbus/qcom-ngd-ctrl.c

+8 −1
Original line number Diff line number Diff line
@@ -763,7 +763,14 @@ static irqreturn_t qcom_slim_ngd_interrupt(int irq, void *d) 
{

	struct qcom_slim_ngd_ctrl *ctrl = d;

	void __iomem *base = ctrl->ngd->base;

	u32 stat = readl(base + NGD_INT_STAT);

	u32 stat;



	if (pm_runtime_suspended(ctrl->ctrl.dev)) {

		dev_warn_once(ctrl->dev, "Interrupt received while suspended\n");

		return IRQ_NONE;

	}



	stat = readl(base + NGD_INT_STAT);



	if ((stat & NGD_INT_MSG_BUF_CONTE) ||

		(stat & NGD_INT_MSG_TX_INVAL) || (stat & NGD_INT_DEV_ERR) ||