From 6a765c3fe5497359c11536dfbdcf7526ccb2a33f Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 17 Nov 2016 23:49:43 +0000 Subject: drm/i2c: tda998x: fix error cleanup paths If tda998x_get_audio_ports() fails, and we requested the interrupt, we fail to free the interrupt before returning failure. Rework the failure cleanup code and exit paths so that we always clean up properly after an error, and always propagate the error code. Acked-by: Hans Verkuil Signed-off-by: Russell King --- drivers/gpu/drm/i2c/tda998x_drv.c | 31 ++++++++++++++++++------------- 1 file changed, 18 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c index 83407159e957..2a99930f1bda 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -1501,10 +1501,15 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv) /* read version: */ rev_lo = reg_read(priv, REG_VERSION_LSB); + if (rev_lo < 0) { + dev_err(&client->dev, "failed to read version: %d\n", rev_lo); + return rev_lo; + } + rev_hi = reg_read(priv, REG_VERSION_MSB); - if (rev_lo < 0 || rev_hi < 0) { - ret = rev_lo < 0 ? rev_lo : rev_hi; - goto fail; + if (rev_hi < 0) { + dev_err(&client->dev, "failed to read version: %d\n", rev_hi); + return rev_hi; } priv->rev = rev_lo | rev_hi << 8; @@ -1528,7 +1533,7 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv) default: dev_err(&client->dev, "found unsupported device: %04x\n", priv->rev); - goto fail; + return -ENXIO; } /* after reset, enable DDC: */ @@ -1566,7 +1571,7 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv) dev_err(&client->dev, "failed to request IRQ#%u: %d\n", client->irq, ret); - goto fail; + goto err_irq; } /* enable HPD irq */ @@ -1589,19 +1594,19 @@ static int tda998x_create(struct i2c_client *client, struct tda998x_priv *priv) ret = tda998x_get_audio_ports(priv, np); if (ret) - goto fail; + goto err_audio; if (priv->audio_port[0].format != AFMT_UNUSED) tda998x_audio_codec_init(priv, &client->dev); return 0; -fail: - /* if encoder_init fails, the encoder slave is never registered, - * so cleanup here: - */ - if (priv->cec) - i2c_unregister_device(priv->cec); - return -ENXIO; + +err_audio: + if (client->irq) + free_irq(client->irq, priv); +err_irq: + i2c_unregister_device(priv->cec); + return ret; } static void tda998x_encoder_prepare(struct drm_encoder *encoder) -- cgit