3.16.62-rc1 review patch. If anyone has any objections, please let me know.
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From: Geert Uytterhoeven geert+renesas@glider.be
commit c1ca59c22c56930b377a665fdd1b43351887830b 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.
Based on a patch for sh-msiof by Gaku Inami.
Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Mark Brown broonie@kernel.org [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings ben@decadent.org.uk --- drivers/spi/spi-rspi.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
--- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -1158,6 +1158,29 @@ static struct platform_device_id spi_dri
MODULE_DEVICE_TABLE(platform, spi_driver_ids);
+#ifdef CONFIG_PM_SLEEP +static int rspi_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rspi_data *rspi = platform_get_drvdata(pdev); + + return spi_master_suspend(rspi->master); +} + +static int rspi_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rspi_data *rspi = platform_get_drvdata(pdev); + + return spi_master_resume(rspi->master); +} + +static SIMPLE_DEV_PM_OPS(rspi_pm_ops, rspi_suspend, rspi_resume); +#define DEV_PM_OPS &rspi_pm_ops +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + static struct platform_driver rspi_driver = { .probe = rspi_probe, .remove = rspi_remove, @@ -1165,6 +1188,7 @@ static struct platform_driver rspi_drive .driver = { .name = "renesas_spi", .owner = THIS_MODULE, + .pm = DEV_PM_OPS, .of_match_table = of_match_ptr(rspi_of_match), }, };