From: Lizhi Hou <lizhi.hou@amd.com>
Date: Thu, 2 Jan 2025 21:22:41 +0000 (-0800)
Subject: accel/amdxdna: Use rcu_access_pointer for __rcu pointer
X-Git-Tag: v6.14-rc1~174^2~10^2~14
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=1f74400529488906dd0c57a4d1520a639bfd91d8;p=thirdparty%2Flinux.git

accel/amdxdna: Use rcu_access_pointer for __rcu pointer

Use rcu_access_pointer for pid in struct drm_file. This fixes sparse
warning.

Fixes: be462c97b7df ("accel/amdxdna: Add hardware context")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202412311210.LfeHTzLw-lkp@intel.com/
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250102212244.1586340-4-lizhi.hou@amd.com
---

diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.c b/drivers/accel/amdxdna/amdxdna_pci_drv.c
index 194e44fc243d1..97d4a032171f1 100644
--- a/drivers/accel/amdxdna/amdxdna_pci_drv.c
+++ b/drivers/accel/amdxdna/amdxdna_pci_drv.c
@@ -61,7 +61,7 @@ static int amdxdna_drm_open(struct drm_device *ddev, struct drm_file *filp)
 		goto put_rpm;
 	}
 
-	client->pid = pid_nr(filp->pid);
+	client->pid = pid_nr(rcu_access_pointer(filp->pid));
 	client->xdna = xdna;
 
 	client->sva = iommu_sva_bind_device(xdna->ddev.dev, current->mm);