Re: [PATCH v2 1/6] Revert "drivers/tty/serial: make 8250/8250_mtk.c explicitly non-modular"
From: Paul Gortmaker <hidden>
Date: 2016-02-11 16:01:20
Also in:
linux-arm-kernel, linux-mediatek, lkml
[[PATCH v2 1/6] Revert "drivers/tty/serial: make 8250/8250_mtk.c explicitly non-modular"] On 11/02/2016 (Thu 16:41) Arnd Bergmann wrote:
This reverts commit d72d391c126e, which tried to remove dead code but left the driver in a useless state when the main 8250 driver is a
Am I misunderstanding something? The commit didn't cause the driver to be in a useless state for 8250=m. But rather isn't that it was a pre-existing condition, independent of the change to 8250_mtk.c to remove the dead code in d72d391c126e? Since the commit did not touch Kconfig or Makefile, I can't see how it could cause some new useless state that did not already exist, and hence the "Fixes:" tag is invalid as well. Paul. --
quoted hunk ↗ jump to hunk
loadable module. This would normally result in a link error, but as the entire drivers/tty/serial/8250/ directory is only entered when CONFIG_SERIAL_8250 is set, we never notice that the driver does not get built in this configuration. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: d72d391c126e ("drivers/tty/serial: make 8250/8250_mtk.c explicitly non-modular") --- drivers/tty/serial/8250/8250_mtk.c | 35 ++++++++++++++++++++++++++++------- 1 file changed, 28 insertions(+), 7 deletions(-)diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c index 0e590b233f03..78883ca64ddd 100644 --- a/drivers/tty/serial/8250/8250_mtk.c +++ b/drivers/tty/serial/8250/8250_mtk.c@@ -16,7 +16,7 @@ */ #include <linux/clk.h> #include <linux/io.h> -#include <linux/init.h> +#include <linux/module.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/platform_device.h>@@ -245,6 +245,23 @@ static int mtk8250_probe(struct platform_device *pdev) return 0; } +static int mtk8250_remove(struct platform_device *pdev) +{ + struct mtk8250_data *data = platform_get_drvdata(pdev); + + pm_runtime_get_sync(&pdev->dev); + + serial8250_unregister_port(data->line); + + pm_runtime_disable(&pdev->dev); + pm_runtime_put_noidle(&pdev->dev); + + if (!pm_runtime_status_suspended(&pdev->dev)) + mtk8250_runtime_suspend(&pdev->dev); + + return 0; +} + #ifdef CONFIG_PM_SLEEP static int mtk8250_suspend(struct device *dev) {@@ -275,18 +292,18 @@ static const struct of_device_id mtk8250_of_match[] = { { .compatible = "mediatek,mt6577-uart" }, { /* Sentinel */ } }; +MODULE_DEVICE_TABLE(of, mtk8250_of_match); static struct platform_driver mtk8250_platform_driver = { .driver = { - .name = "mt6577-uart", - .pm = &mtk8250_pm_ops, - .of_match_table = mtk8250_of_match, - .suppress_bind_attrs = true, - + .name = "mt6577-uart", + .pm = &mtk8250_pm_ops, + .of_match_table = mtk8250_of_match, }, .probe = mtk8250_probe, + .remove = mtk8250_remove, }; -builtin_platform_driver(mtk8250_platform_driver); +module_platform_driver(mtk8250_platform_driver); #ifdef CONFIG_SERIAL_8250_CONSOLE static int __init early_mtk8250_setup(struct earlycon_device *device,@@ -302,3 +319,7 @@ static int __init early_mtk8250_setup(struct earlycon_device *device, OF_EARLYCON_DECLARE(mtk8250, "mediatek,mt6577-uart", early_mtk8250_setup); #endif + +MODULE_AUTHOR("Matthias Brugger"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Mediatek 8250 serial port driver");-- 2.7.0