On Wed, 12 Apr 2023 at 18:56, Eddie James <eajames@xxxxxxxxxxxxx> wrote:
If a master scan occurs while the master is being unregistered,typo: devices
the devicecs may end up with incorrect and possibly duplicate names,
resulting in kernel warnings. Ensure the master index isn't changedThe ida functions are supposed to not require locking, but protecting
outside of the scan mutex.
Signed-off-by: Eddie James <eajames@xxxxxxxxxxxxx>
---
drivers/fsi/fsi-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index fcbf0469ce3f..18d4d68482d7 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -1354,12 +1354,12 @@ EXPORT_SYMBOL_GPL(fsi_master_register);
void fsi_master_unregister(struct fsi_master *master)
{
+ mutex_lock(&master->scan_lock);
against the test and changing of ->idx makes sense.
Do you want to add a Fixes: line?
if (master->idx >= 0) {the ida_simple functions are depreciated, at some point we should
ida_simple_remove(&master_ida, master->idx);
replace them with ida_alloc/ida_free.
master->idx = -1;
}
- mutex_lock(&master->scan_lock);
fsi_master_unscan(master);
mutex_unlock(&master->scan_lock);
device_unregister(&master->dev);
--
2.31.1