linux-kernel - [PATCH v3 01/11] tee: allow a driver to allocate a tee

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Message-Id: <20250327-qcom-tee-using-tee-ss-without-mem-obj-v3-1-7f457073282d@oss.qualcomm.com>
Date: Thu, 27 Mar 2025 19:47:23 -0700
From: Amirreza Zarrabi <amirreza.zarrabi@....qualcomm.com>
To: Jens Wiklander <jens.wiklander@...aro.org>,
        Sumit Garg <sumit.garg@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Apurupa Pattapu <quic_apurupa@...cinc.com>,
        Kees Cook <kees@...nel.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>
Cc: linux-arm-msm@...r.kernel.org, op-tee@...ts.trustedfirmware.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org,
        linux-doc@...r.kernel.org,
        Amirreza Zarrabi <amirreza.zarrabi@....qualcomm.com>
Subject: [PATCH v3 01/11] tee: allow a driver to allocate a tee_device
 without a pool

A TEE driver doesn't always need to provide a pool if it doesn't
support memory sharing ioctls and can allocate memory for TEE
messages in another way. Although this is mentioned in the
documentation for tee_device_alloc(), it is not handled correctly.

Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@....qualcomm.com>
---
 drivers/tee/tee_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index d113679b1e2d..24edce4cdbaa 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -888,7 +888,7 @@ struct tee_device *tee_device_alloc(const struct tee_desc *teedesc,
 
 	if (!teedesc || !teedesc->name || !teedesc->ops ||
 	    !teedesc->ops->get_version || !teedesc->ops->open ||
-	    !teedesc->ops->release || !pool)
+	    !teedesc->ops->release)
 		return ERR_PTR(-EINVAL);
 
 	teedev = kzalloc(sizeof(*teedev), GFP_KERNEL);

-- 
2.34.1