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mei: expose device state in sysfs

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Expose mei device state to user-space through sysfs.
This gives indication to applications that driver is in transition,
usefully mostly to detect link reset state.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin
2019-04-22 09:51:07 +03:00
committed by Greg Kroah-Hartman
parent d65bf04200
commit 43b8a7ed47
5 changed files with 87 additions and 18 deletions
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3
drivers/misc/mei/mei_dev.h
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@@ -525,7 +525,6 @@ struct mei_device {
struct dentry *dbgfs_dir;
#endif /* CONFIG_DEBUG_FS */
const struct mei_hw_ops *ops;
char hw[0] __aligned(sizeof(void *));
};
@@ -584,6 +583,8 @@ int mei_restart(struct mei_device *dev);
void mei_stop(struct mei_device *dev);
void mei_cancel_work(struct mei_device *dev);
void mei_set_devstate(struct mei_device *dev, enum mei_dev_state state);
int mei_dmam_ring_alloc(struct mei_device *dev);
void mei_dmam_ring_free(struct mei_device *dev);
bool mei_dma_ring_is_allocated(struct mei_device *dev);