From: Lizhi Hou <lizhi.hou@amd.com>
Date: Tue, 7 Jul 2026 17:23:07 +0000 (-0700)
Subject: accel/amdxdna: Check drmm_mutex_init() return value
X-Git-Tag: v7.2-rc3~27^2~3^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0f092793a7b527dfb2cde323d4e5630d43447b84;p=thirdparty%2Fkernel%2Flinux.git

accel/amdxdna: Check drmm_mutex_init() return value

drmm_mutex_init() may fail and return an error. Check the return value
and abort initialization if mutex creation fails.

Fixes: 8c9ff1b181ba ("accel/amdxdna: Add a new driver for AMD AI Engine")
Reviewed-by: Max Zhen <max.zhen@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260707172307.539676-1-lizhi.hou@amd.com
---

diff --git a/drivers/accel/amdxdna/amdxdna_pci_drv.c b/drivers/accel/amdxdna/amdxdna_pci_drv.c
index e94d8290a807..86e9c230875a 100644
--- a/drivers/accel/amdxdna/amdxdna_pci_drv.c
+++ b/drivers/accel/amdxdna/amdxdna_pci_drv.c
@@ -373,7 +373,10 @@ static int amdxdna_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (ret)
 		return ret;
 
-	drmm_mutex_init(ddev, &xdna->dev_lock);
+	ret = drmm_mutex_init(ddev, &xdna->dev_lock);
+	if (ret)
+		return ret;
+
 	init_rwsem(&xdna->notifier_lock);
 	INIT_LIST_HEAD(&xdna->client_list);
 	pci_set_drvdata(pdev, xdna);