On Wed, 11 Oct 2023, David E. Box wrote:
> Use cleanup.h helpers to handle cleanup of resources in
> intel_vsec_add_dev() after failures.
>
> Signed-off-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx>
> ---
> V3 - New patch.
>
> drivers/platform/x86/intel/vsec.c | 17 ++++++++++-------
> 1 file changed, 10 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
> index 15866b7d3117..f03ab89ab7c0 100644
> --- a/drivers/platform/x86/intel/vsec.c
> +++ b/drivers/platform/x86/intel/vsec.c
> @@ -15,6 +15,7 @@
>
> #include <linux/auxiliary_bus.h>
> #include <linux/bits.h>
> +#include <linux/cleanup.h>
> #include <linux/delay.h>
> #include <linux/kernel.h>
> #include <linux/idr.h>
> @@ -155,10 +156,10 @@ EXPORT_SYMBOL_NS_GPL(intel_vsec_add_aux, INTEL_VSEC);
> static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *header,
> struct intel_vsec_platform_info *info)
> {
> - struct intel_vsec_device *intel_vsec_dev;
> + struct intel_vsec_device __free(kfree) *intel_vsec_dev = NULL;
> struct resource *res, *tmp;
> unsigned long quirks = info->quirks;
> - int i;
> + int ret, i;
>
> if (!intel_vsec_supported(header->id, info->caps))
> return -EINVAL;
> @@ -178,10 +179,8 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
> return -ENOMEM;
>
> res = kcalloc(header->num_entries, sizeof(*res), GFP_KERNEL);
> - if (!res) {
> - kfree(intel_vsec_dev);
> + if (!res)
> return -ENOMEM;
> - }
>
> if (quirks & VSEC_QUIRK_TABLE_SHIFT)
> header->offset >>= TABLE_OFFSET_SHIFT;
> @@ -208,8 +207,12 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
> else
> intel_vsec_dev->ida = &intel_vsec_ida;
>
> - return intel_vsec_add_aux(pdev, NULL, intel_vsec_dev,
> - intel_vsec_name(header->id));
> + ret = intel_vsec_add_aux(pdev, NULL, intel_vsec_dev,
> + intel_vsec_name(header->id));
> +
> + no_free_ptr(intel_vsec_dev);
> +
> + return ret;
So if intel_vsec_add_aux() returned an error, intel_vsec_dev won't be
freed because of the call call to no_free_ptr() before return. I that's
not what you intended?
--
i.
