Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d7ee50cc authored by Aditya Bavanari's avatar Aditya Bavanari
Browse files

asoc: codecs: Avoid spi data transfer during suspend 



SPI data transfer can happen during suspend due to race
conditions leading to NOC issues. Synchronize data transfer
and suspend to fix this issue.

Change-Id: Ia5b4d0d16d9bf4fa4a4b73e3509a7d04b45d843f
Signed-off-by: default avatarAditya Bavanari <abavanar@codeaurora.org>
parent 15430858

asoc/codecs/wcd-spi.c

+11 −1
Original line number Diff line number Diff line
@@ -815,6 +815,15 @@ static int __wcd_spi_data_xfer(struct spi_device *spi, 
		return -EINVAL;

	}



	WCD_SPI_MUTEX_LOCK(spi, wcd_spi->clk_mutex);

	if (wcd_spi_is_suspended(wcd_spi)) {

		dev_dbg(&spi->dev,

			"%s: SPI suspended, cannot perform transfer\n",

			__func__);

		ret = -EIO;

		goto done;

	}



	WCD_SPI_MUTEX_LOCK(spi, wcd_spi->xfer_mutex);

	if (msg->len == WCD_SPI_WORD_BYTE_CNT) {

		if (xfer_req == WCD_SPI_XFER_WRITE)
@@ -827,7 +836,8 @@ static int __wcd_spi_data_xfer(struct spi_device *spi, 
		ret = wcd_spi_transfer_split(spi, msg, xfer_req);

	}

	WCD_SPI_MUTEX_UNLOCK(spi, wcd_spi->xfer_mutex);



done:

	WCD_SPI_MUTEX_UNLOCK(spi, wcd_spi->clk_mutex);

	return ret;

}