From: Dmytro Maluka Date: Mon, 17 Jul 2023 19:37:37 +0000 (+0200) Subject: ASoC: da7219: Check for failure reading AAD IRQ events X-Git-Tag: v6.6.17~3959^2~26^2~8^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f0691dc16206f21b13c464434366e2cd632b8ed7;p=platform%2Fkernel%2Flinux-rpi.git ASoC: da7219: Check for failure reading AAD IRQ events When handling an AAD interrupt, if IRQ events read failed (for example, due to i2c "Transfer while suspended" failure, i.e. when attempting to read it while DA7219 is suspended, which may happen due to a spurious AAD interrupt), the events array contains garbage uninitialized values. So instead of trying to interprete those values and doing any actions based on them (potentially resulting in misbehavior, e.g. reporting bogus events), refuse to handle the interrupt. Signed-off-by: Dmytro Maluka Link: https://lore.kernel.org/r/20230717193737.161784-3-dmy@semihalf.com Signed-off-by: Mark Brown --- diff --git a/sound/soc/codecs/da7219-aad.c b/sound/soc/codecs/da7219-aad.c index 202715b..581b334a 100644 --- a/sound/soc/codecs/da7219-aad.c +++ b/sound/soc/codecs/da7219-aad.c @@ -361,11 +361,15 @@ static irqreturn_t da7219_aad_irq_thread(int irq, void *data) struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component); u8 events[DA7219_AAD_IRQ_REG_MAX]; u8 statusa; - int i, report = 0, mask = 0; + int i, ret, report = 0, mask = 0; /* Read current IRQ events */ - regmap_bulk_read(da7219->regmap, DA7219_ACCDET_IRQ_EVENT_A, - events, DA7219_AAD_IRQ_REG_MAX); + ret = regmap_bulk_read(da7219->regmap, DA7219_ACCDET_IRQ_EVENT_A, + events, DA7219_AAD_IRQ_REG_MAX); + if (ret) { + dev_warn_ratelimited(component->dev, "Failed to read IRQ events: %d\n", ret); + return IRQ_NONE; + } if (!events[DA7219_AAD_IRQ_REG_A] && !events[DA7219_AAD_IRQ_REG_B]) return IRQ_NONE;