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authorClaudiu Beznea <claudiu.beznea@microchip.com>2022-07-27 11:08:13 +0200
committerMark Brown <broonie@kernel.org>2022-07-27 13:03:13 +0200
commit768ac4f12ca0fda935f58eb8c5120e9d795bc6e3 (patch)
treeea35446848dabafac129bc1a68d441dcada04f3b /sound/soc/atmel/mchp-spdifrx.c
parentLinux 5.19-rc1 (diff)
downloadlinux-768ac4f12ca0fda935f58eb8c5120e9d795bc6e3.tar.xz
linux-768ac4f12ca0fda935f58eb8c5120e9d795bc6e3.zip
ASoC: mchp-spdifrx: disable end of block interrupt on failures
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: ef265c55c1ac ("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>
Diffstat (limited to 'sound/soc/atmel/mchp-spdifrx.c')
-rw-r--r--sound/soc/atmel/mchp-spdifrx.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/sound/soc/atmel/mchp-spdifrx.c b/sound/soc/atmel/mchp-spdifrx.c
index 5fc968483f2c..a7baa0385ec5 100644
--- a/sound/soc/atmel/mchp-spdifrx.c
+++ b/sound/soc/atmel/mchp-spdifrx.c
@@ -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;
}