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[153.246.134.249]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29eea016ac2sm35606645ad.49.2025.12.11.17.07.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 11 Dec 2025 17:07:44 -0800 (PST) Message-ID: Date: Fri, 12 Dec 2025 02:07:40 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] tee: qcomtee: call: Fix confusing cleanup.h syntax To: Sumit Garg Cc: Amirreza Zarrabi , Jens Wiklander , linux-arm-msm@vger.kernel.org, op-tee@lists.trustedfirmware.org, linux-kernel@vger.kernel.org References: <20251208020844.5310-4-krzysztof.kozlowski@oss.qualcomm.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzysztof.kozlowski@oss.qualcomm.com; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzTpLcnp5c3p0b2Yg S296bG93c2tpIDxrcnp5c3p0b2Yua296bG93c2tpQG9zcy5xdWFsY29tbS5jb20+wsGXBBMB CgBBFiEEm9B+DgxR+NWWd7dUG5NDfTtBYpsFAmkknB4CGwMFCRaWdJoFCwkIBwICIgIGFQoJ CAsCBBYCAwECHgcCF4AACgkQG5NDfTtBYpuCRw/+J19mfHuaPt205FXRSpogs/WWdheqNZ2s i50LIK7OJmBQ8+17LTCOV8MYgFTDRdWdM5PF2OafmVd7CT/K4B3pPfacHATtOqQFHYeHrGPf 2+4QxUyHIfx+Wp4GixnqpbXc76nTDv+rX8EbAB7e+9X35oKSJf/YhLFjGOD1Nl/s1WwHTJtQ a2XSXZ2T9HXa+nKMQfaiQI4WoFXjSt+tsAFXAuq1SLarpct4h52z4Zk//ET6Xs0zCWXm9HEz v4WR/Q7sycHeCGwm2p4thRak/B7yDPFOlZAQNdwBsnCkoFE1qLXI8ZgoWNd4TlcjG9UJSwru s1WTQVprOBYdxPkvUOlaXYjDo2QsSaMilJioyJkrniJnc7sdzcfkwfdWSnC+2DbHd4wxrRtW kajTc7OnJEiM78U3/GfvXgxCwYV297yClzkUIWqVpY2HYLBgkI89ntnN95ePyTnLSQ8WIZJk ug0/WZfTmCxX0SMxfCYt36QwlWsImHpArS6xjTvUwUNTUYN6XxYZuYBmJQF9eLERK2z3KUeY 2Ku5ZTm5axvlraM0VhUn8yv7G5Pciv7oGXJxrA6k4P9CAvHYeJSTXYnrLr/Kabn+6rc0my/l RMq9GeEUL3LbIUadL78yAtpf7HpNavYkVureuFD8xK8HntEHySnf7s2L28+kDbnDi27WR5kn u/POwU0EVUNcNAEQAM2StBhJERQvgPcbCzjokShn0cRA4q2SvCOvOXD+0KapXMRFE+/PZeDy fv4dEKuCqeh0hihSHlaxTzg3TcqUu54w2xYskG8Fq5tg3gm4kh1Gvh1LijIXX99ABA8eHxOG mLPRIBkXHqJYoHtCvPc6sYKNM9xbp6I4yF56xVLmHGJ61KaWKf5KKWYgA9kfHufbja7qR0c6 H79LIsiYqf92H1HNq1WlQpu/fh4/XAAaV1axHFt/dY/2kU05tLMj8GjeQDz1fHas7augL4ar gt4e+jum3NwtyupodQBxncKAUbzwKcDrPqUFmfRbJ7ARw8491xQHZDsP82JRj4cOJX32sBg8 nO2N5OsFJOcd5IE9v6qfllkZDAh1Rb1h6DFYq9dcdPAHl4zOj9EHq99/CpyccOh7SrtWDNFF knCmLpowhct95ZnlavBrDbOV0W47gO33WkXMFI4il4y1+Bv89979rVYn8aBohEgET41SpyQz 7fMkcaZU+ok/+HYjC/qfDxT7tjKXqBQEscVODaFicsUkjheOD4BfWEcVUqa+XdUEciwG/SgN yxBZepj41oVqFPSVE+Ni2tNrW/e16b8mgXNngHSnbsr6pAIXZH3qFW+4TKPMGZ2rZ6zITrMi p+12jgw4mGjy5y06JZvA02rZT2k9aa7i9dUUFggaanI09jNGbRA/ABEBAAHCwXwEGAEKACYC GwwWIQSb0H4ODFH41ZZ3t1Qbk0N9O0FimwUCaBdQXwUJFpZbKgAKCRAbk0N9O0Fim07TD/92 Vcmzn/jaEBcqyT48ODfDIQVvg2nIDW+qbHtJ8DOT0d/qVbBTU7oBuo0xuHo+MTBp0pSTWbTh LsSN1AuyP8wFKChC0JPcwOZZRS0dl3lFgg+c+rdZUHjsa247r+7fvm2zGG1/u+33lBJgnAIH 5lSCjhP4VXiGq5ngCxGRuBq+0jNCKyAOC/vq2cS/dgdXwmf2aL8G7QVREX7mSl0x+CjWyrpF c1D/9NV/zIWBG1NR1fFb+oeOVhRGubYfiS62htUQjGLK7qbTmrd715kH9Noww1U5HH7WQzeP t/SvC0RhQXNjXKBB+lwwM+XulFigmMF1KybRm7MNoLBrGDa3yGpAkHMkJ7NM4iSMdSxYAr60 RtThnhKc2kLIzd8GqyBh0nGPIL+1ZVMBDXw1Eu0/Du0rWt1zAKXQYVAfBLCTmkOnPU0fjR7q VT41xdJ6KqQMNGQeV+0o9X91X6VBeK6Na3zt5y4eWkve65DRlk1aoeBmhAteioLZlXkqu0pZ v+PKIVf+zFKuh0At/TN/618e/QVlZPbMeNSp3S3ieMP9Q6y4gw5CfgiDRJ2K9g99m6Rvlx1q wom6QbU06ltbvJE2K9oKd9nPp1NrBfBdEhX8oOwdCLJXEq83vdtOEqE42RxfYta4P3by0BHp cwzYbmi/Et7T2+47PN9NZAOyb771QoVr8A== In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: p5TBlgTzgG8YvjeTfePYOa1xWx54SjbZ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjEyMDAwNyBTYWx0ZWRfX17uMIMZ4Syrw q68Y3Jl8EzFDkKfpUXOtrJN03oKm4NPNV/H5KcwhwpEgUuj7GCHdBLiYDrPq2F/l0wJ2Mz95HCV hClbRevmBG9Fbj/6xN6lvTZZg6HN+Gi6BzJW7gyBZBIxJ1NSiFtkOmgwTsfTbeGm8ABLOUjKGM+ Xpwo1aokUU8+a2DTFg/By+DySKldrNXAtWXQxois2qKbiDWrbsB1o85Hby4tkm/k9iRjrzS/uQ4 RWEmB4hiuA5u6UXfKBEmz8TifPu3PWouR27P0410eR/MPpWFr92Lua4IJJXDoRfymWy5nxxipOr EH7/CdRwpIeFnupR8/zNXm18mDTcq3yxPg1yGhK/ppYGtXtnoAhrcEHxW7cRwCG99gDY/CQv/x0 bVk5Z1gvZmtNrJLUW+Wb3BN+/8T6Mg== X-Proofpoint-ORIG-GUID: p5TBlgTzgG8YvjeTfePYOa1xWx54SjbZ X-Authority-Analysis: v=2.4 cv=f/lFxeyM c=1 sm=1 tr=0 ts=693b6ae2 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=gC7H+NTNV8TiHuUi9Bl0tg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=rtcvcfkpwUOWW_TkcukA:9 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-12_01,2025-12-11_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 bulkscore=0 adultscore=0 spamscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512120007 On 12/12/2025 01:55, Sumit Garg wrote: > On Mon, Dec 08, 2025 at 03:08:45AM +0100, Krzysztof Kozlowski wrote: >> Initializing automatic __free variables to NULL without need (e.g. >> branches with different allocations), followed by actual allocation is >> in contrary to explicit coding rules guiding cleanup.h: >> >> "Given that the "__free(...) = NULL" pattern for variables defined at >> the top of the function poses this potential interdependency problem the >> recommendation is to always define and assign variables in one statement >> and not group variable definitions at the top of the function when >> __free() is used." >> >> Code does not have a bug, but is less readable and uses discouraged >> coding practice, so fix that by moving declaration to the place of >> assignment. > > Okay I see but.. > >> >> Signed-off-by: Krzysztof Kozlowski >> --- >> drivers/tee/qcomtee/call.c | 17 ++++++++--------- >> 1 file changed, 8 insertions(+), 9 deletions(-) >> >> diff --git a/drivers/tee/qcomtee/call.c b/drivers/tee/qcomtee/call.c >> index 65f9140d4e1f..8f8830f0df26 100644 >> --- a/drivers/tee/qcomtee/call.c >> +++ b/drivers/tee/qcomtee/call.c >> @@ -395,9 +395,7 @@ static int qcomtee_object_invoke(struct tee_context *ctx, >> struct tee_ioctl_object_invoke_arg *arg, >> struct tee_param *params) >> { >> - struct qcomtee_object_invoke_ctx *oic __free(kfree) = NULL; >> struct qcomtee_context_data *ctxdata = ctx->data; >> - struct qcomtee_arg *u __free(kfree) = NULL; >> struct qcomtee_object *object; >> int i, ret, result; >> >> @@ -412,12 +410,14 @@ static int qcomtee_object_invoke(struct tee_context *ctx, >> } >> >> /* Otherwise, invoke a QTEE object: */ >> - oic = qcomtee_object_invoke_ctx_alloc(ctx); >> + struct qcomtee_object_invoke_ctx *oic __free(kfree) = >> + qcomtee_object_invoke_ctx_alloc(ctx); >> if (!oic) >> return -ENOMEM; >> >> /* +1 for ending QCOMTEE_ARG_TYPE_INV. */ >> - u = kcalloc(arg->num_params + 1, sizeof(*u), GFP_KERNEL); >> + struct qcomtee_arg *u __free(kfree) = kcalloc(arg->num_params + 1, sizeof(*u), >> + GFP_KERNEL); > > ..this makes the code less readable with variable declarations floating Which is intentional. > within the function. I would rather favor to not use the cleanup.h construct > but use explicit kfree() invocations instead like it's done in all other > allocations in the TEE subsystem. Sure, fair. I just don't get why introducing cleanup.h without actually accepting its explicitly documented style... Best regards, Krzysztof