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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-11-10 18:29:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-23 22:12:29 +0300 |
| commit | ad90d0358bd3b4554f243a425168fc7cebe7d04e (patch) | |
| tree | 9eaac8d58cb44b33bbb456a474f79b7f9c63855b /drivers/tty/serial/8250/8250_omap.c | |
| parent | 98b1cc82c4affc16f5598d4fa14b1858671b2263 (diff) | |
| download | linux-ad90d0358bd3b4554f243a425168fc7cebe7d04e.tar.xz | |
serial: 8250: omap: Don't skip resource freeing if pm_runtime_resume_and_get() failed
Returning an error code from .remove() makes the driver core emit the
little helpful error message:
remove callback returned a non-zero value. This will be ignored.
and then remove the device anyhow. So all resources that were not freed
are leaked in this case. Skipping serial8250_unregister_port() has the
potential to keep enough of the UART around to trigger a use-after-free.
So replace the error return (and with it the little helpful error
message) by a more useful error message and continue to cleanup.
Fixes: e3f0c638f428 ("serial: 8250: omap: Fix unpaired pm_runtime_put_sync() in omap8250_remove()")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20231110152927.70601-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250_omap.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_omap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c index 2d42f485c987..661a83dbc11b 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -1592,7 +1592,7 @@ static int omap8250_remove(struct platform_device *pdev) err = pm_runtime_resume_and_get(&pdev->dev); if (err) - return err; + dev_err(&pdev->dev, "Failed to resume hardware\n"); up = serial8250_get_port(priv->line); omap_8250_shutdown(&up->port); |