diff options
| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2023-02-07 13:58:21 +0100 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2023-02-10 17:21:02 +0100 |
| commit | 9a90ea7d378486aa358330dafc7e8c3b27de4d84 (patch) | |
| tree | 3f3edc490edc1ea7fdb84dec122f4b9b1ee551d0 /drivers/platform | |
| parent | platform/x86/amd: pmc: Add line break for readability (diff) | |
| download | linux-9a90ea7d378486aa358330dafc7e8c3b27de4d84.tar.xz linux-9a90ea7d378486aa358330dafc7e8c3b27de4d84.zip | |
platform/x86/intel/vsec: Use mutex for ida_alloc() and ida_free()
ID alloc and free functions don't have in built protection for parallel
invocation of ida_alloc() and ida_free(). With the current flow in the
vsec driver, there is no such scenario. But add mutex protection for
potential future changes.
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20230207125821.3837799-1-srinivas.pandruvada@linux.intel.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/intel/vsec.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c index b936fc5776d7..f1680b7e64f5 100644 --- a/drivers/platform/x86/intel/vsec.c +++ b/drivers/platform/x86/intel/vsec.c @@ -129,11 +129,16 @@ 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); + 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); } @@ -145,7 +150,9 @@ int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent, struct auxiliary_device *auxdev = &intel_vsec_dev->auxdev; int ret, id; + mutex_lock(&vsec_ida_lock); ret = ida_alloc(intel_vsec_dev->ida, GFP_KERNEL); + mutex_unlock(&vsec_ida_lock); if (ret < 0) { kfree(intel_vsec_dev); return ret; @@ -161,7 +168,9 @@ int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent, ret = auxiliary_device_init(auxdev); if (ret < 0) { + mutex_lock(&vsec_ida_lock); ida_free(intel_vsec_dev->ida, auxdev->id); + mutex_unlock(&vsec_ida_lock); kfree(intel_vsec_dev->resource); kfree(intel_vsec_dev); return ret; |