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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>
This commit is contained in:
Jean-Jacques Hiblot 2016-05-31 17:56:23 +02:00 committed by Mark Brown
parent 1a695a905c
commit 3ac066e222
1 changed files with 7 additions and 0 deletions
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7
drivers/spi/spi-ti-qspi.c
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@ -646,6 +646,13 @@ static int ti_qspi_probe(struct platform_device *pdev)
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);