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ASoC: mchp-spdifrx: disable end of block interrupt on failures

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[ Upstream commit 768ac4f12c ]

Disable end of block interrupt in case of wait for completion timeout
or errors to undo previously enable operation (done in
mchp_spdifrx_isr_blockend_en()). Otherwise we can end up with an
unbalanced reference counter for this interrupt.

Fixes: ef265c55c1 ("ASoC: mchp-spdifrx: add driver for SPDIF RX")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220727090814.2446111-2-claudiu.beznea@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Claudiu Beznea 2022-07-27 12:08:13 +03:00 committed by Greg Kroah-Hartman
parent 8301c204db
commit 96ead66798
1 changed files with 6 additions and 3 deletions
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9
sound/soc/atmel/mchp-spdifrx.c
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@ -288,15 +288,17 @@ static void mchp_spdifrx_isr_blockend_en(struct mchp_spdifrx_dev *dev)
spin_unlock_irqrestore(&dev->blockend_lock, flags);
}
/* called from atomic context only */
/* called from atomic/non-atomic context */
static void mchp_spdifrx_isr_blockend_dis(struct mchp_spdifrx_dev *dev)
{
spin_lock(&dev->blockend_lock);
unsigned long flags;
spin_lock_irqsave(&dev->blockend_lock, flags);
dev->blockend_refcount--;
/* don't enable BLOCKEND interrupt if it's already enabled */
if (dev->blockend_refcount == 0)
regmap_write(dev->regmap, SPDIFRX_IDR, SPDIFRX_IR_BLOCKEND);
spin_unlock(&dev->blockend_lock);
spin_unlock_irqrestore(&dev->blockend_lock, flags);
}
static irqreturn_t mchp_spdif_interrupt(int irq, void *dev_id)
@ -575,6 +577,7 @@ static int mchp_spdifrx_subcode_ch_get(struct mchp_spdifrx_dev *dev,
if (ret <= 0) {
dev_dbg(dev->dev, "user data for channel %d timeout\n",
channel);
mchp_spdifrx_isr_blockend_dis(dev);
return ret;
}