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mfd: cros_ec: Don't try to grab log when suspended

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We should stop our worker thread while we're suspended.  If we don't
then we'll get messages like:

  cros-ec-spi spi5.0: spi transfer failed: -108
  cros-ec-spi spi5.0: cs-deassert spi transfer failed: -108
  cros-ec-ctl cros-ec-ctl.0.auto: EC communication failed

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Douglas Anderson 2018-04-18 12:24:00 +02:00 committed by Lee Jones
parent eb3f2f2396
commit 44d99d7372
3 changed files with 26 additions and 0 deletions
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4
drivers/mfd/cros_ec_dev.c
View File

@ -466,6 +466,8 @@ static __maybe_unused int ec_device_suspend(struct device *dev)
{
struct cros_ec_dev *ec = dev_get_drvdata(dev);
cros_ec_debugfs_suspend(ec);
lb_suspend(ec);
return 0;
@ -475,6 +477,8 @@ static __maybe_unused int ec_device_resume(struct device *dev)
{
struct cros_ec_dev *ec = dev_get_drvdata(dev);
cros_ec_debugfs_resume(ec);
lb_resume(ec);
return 0;

20
drivers/platform/chrome/cros_ec_debugfs.c
View File

@ -470,3 +470,23 @@ void cros_ec_debugfs_remove(struct cros_ec_dev *ec)
cros_ec_cleanup_console_log(ec->debug_info);
}
EXPORT_SYMBOL(cros_ec_debugfs_remove);
void cros_ec_debugfs_suspend(struct cros_ec_dev *ec)
{
/*
* cros_ec_debugfs_init() failures are non-fatal; it's also possible
* that we initted things but decided that console log wasn't supported.
* We'll use the same set of checks that cros_ec_debugfs_remove() +
* cros_ec_cleanup_console_log() end up using to handle those cases.
*/
if (ec->debug_info && ec->debug_info->log_buffer.buf)
cancel_delayed_work_sync(&ec->debug_info->log_poll_work);
}
EXPORT_SYMBOL(cros_ec_debugfs_suspend);
void cros_ec_debugfs_resume(struct cros_ec_dev *ec)
{
if (ec->debug_info && ec->debug_info->log_buffer.buf)
schedule_delayed_work(&ec->debug_info->log_poll_work, 0);
}
EXPORT_SYMBOL(cros_ec_debugfs_resume);

2
include/linux/mfd/cros_ec.h
View File

@ -327,5 +327,7 @@ extern struct attribute_group cros_ec_vbc_attr_group;
/* debugfs stuff */
int cros_ec_debugfs_init(struct cros_ec_dev *ec);
void cros_ec_debugfs_remove(struct cros_ec_dev *ec);
void cros_ec_debugfs_suspend(struct cros_ec_dev *ec);
void cros_ec_debugfs_resume(struct cros_ec_dev *ec);
#endif /* __LINUX_MFD_CROS_EC_H */