ida_alloc()/ida_free() don't need any mutex, so remove this one. It was introduced by commit 9a90ea7d3784 ("platform/x86/intel/vsec: Use mutex for ida_alloc() and ida_free()"). Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx> --- See: https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L375 https://elixir.bootlin.com/linux/v6.11.2/source/lib/idr.c#L484 Review with care. This patch is clearly the opposite of the one in Fixes which states that locking IS needed. IIUC, idr_ functions need locking, but not ida_. If I'm wrong, could you elaborate why? (because many other places will need to be fixed and the doc certainly needs updating) --- drivers/platform/x86/intel/vsec.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c index 7b5cc9993974..9e0f8e38178c 100644 --- a/drivers/platform/x86/intel/vsec.c +++ b/drivers/platform/x86/intel/vsec.c @@ -79,17 +79,13 @@ static void intel_vsec_remove_aux(void *data) auxiliary_device_uninit(data); } -static DEFINE_MUTEX(vsec_ida_lock); - static void intel_vsec_dev_release(struct device *dev) { struct intel_vsec_device *intel_vsec_dev = dev_to_ivdev(dev); xa_erase(&auxdev_array, intel_vsec_dev->id); - mutex_lock(&vsec_ida_lock); ida_free(intel_vsec_dev->ida, intel_vsec_dev->auxdev.id); - mutex_unlock(&vsec_ida_lock); kfree(intel_vsec_dev->resource); kfree(intel_vsec_dev); @@ -113,9 +109,7 @@ int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent, return ret; } - mutex_lock(&vsec_ida_lock); id = ida_alloc(intel_vsec_dev->ida, GFP_KERNEL); - mutex_unlock(&vsec_ida_lock); if (id < 0) { xa_erase(&auxdev_array, intel_vsec_dev->id); kfree(intel_vsec_dev->resource); -- 2.47.0