4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Gaku Inami <[email protected]> commit ffa69d6a16f686efe45269342474e421f2aa58b2 upstream. If the SPI queue is running during system suspend, the system may lock up. Fix this by stopping/restarting the queue during system suspend/resume by calling spi_master_suspend()/spi_master_resume() from the PM callbacks. In-kernel users will receive an -ESHUTDOWN error while system suspend/resume is in progress. Signed-off-by: Gaku Inami <[email protected]> Signed-off-by: Hiromitsu Yamasaki <[email protected]> [geert: Cleanup, reword] Signed-off-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Mark Brown <[email protected]> Cc: [email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/spi/spi-sh-msiof.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -1275,12 +1275,37 @@ static const struct platform_device_id s }; MODULE_DEVICE_TABLE(platform, spi_driver_ids); +#ifdef CONFIG_PM_SLEEP +static int sh_msiof_spi_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev); + + return spi_master_suspend(p->master); +} + +static int sh_msiof_spi_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev); + + return spi_master_resume(p->master); +} + +static SIMPLE_DEV_PM_OPS(sh_msiof_spi_pm_ops, sh_msiof_spi_suspend, + sh_msiof_spi_resume); +#define DEV_PM_OPS &sh_msiof_spi_pm_ops +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + static struct platform_driver sh_msiof_spi_drv = { .probe = sh_msiof_spi_probe, .remove = sh_msiof_spi_remove, .id_table = spi_driver_ids, .driver = { .name = "spi_sh_msiof", + .pm = DEV_PM_OPS, .of_match_table = of_match_ptr(sh_msiof_match), }, };
