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slimbus: qcom-ngd-ctrl: check for device runtime PM status during ISR

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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: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20221118065246.6835-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Kozlowski 2022-11-18 06:52:35 +00:00 committed by Greg Kroah-Hartman
parent ce9c0b06ab
commit 97e1a53091
1 changed files with 8 additions and 1 deletions
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9
drivers/slimbus/qcom-ngd-ctrl.c
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@ -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) ||