spi: spi-ti-qspi: Suspend the queue before removing the device

Before disabling the pm_runtime, we must ensure that there is no transfer
in progress nor will a new one be started. Otherwise the message pump will
fail and in the end, the process requesting the transfer will be stuck.
This behavior has been observed when transferring data from a SPI flash
with dd while removing the module on a DRA7x-evm.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c
index 443f664534e144fd388e2baba7f4d9bb49134772..29ea8d2f982498c4290e4afc15093165656e7897 100644 (file)
--- a/drivers/spi/spi-ti-qspi.c
+++ b/drivers/spi/spi-ti-qspi.c
@@ -646,6 +646,13 @@ free_master:
 
 static int ti_qspi_remove(struct platform_device *pdev)
 {
+       struct ti_qspi *qspi = platform_get_drvdata(pdev);
+       int rc;
+
+       rc = spi_master_suspend(qspi->master);
+       if (rc)
+               return rc;
+
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);