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[75.218.246.15]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84a4f270895sm453108b3a.16.2026.07.13.15.31.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Jul 2026 15:31:28 -0700 (PDT) Message-ID: <75ef4371-b66a-486a-8555-e3a3f6ee5d88@oss.qualcomm.com> Date: Mon, 13 Jul 2026 15:31:27 -0700 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] wifi: ath10k: Drop redundant NULL check on devm_clk_get() To: Krzysztof Kozlowski , Jeff Johnson , linux-wireless@vger.kernel.org, ath10k@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260705172405.119084-2-krzysztof.kozlowski@oss.qualcomm.com> From: Jeff Johnson Content-Language: en-US In-Reply-To: <20260705172405.119084-2-krzysztof.kozlowski@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: c38y_lSWnKQKTJMTKe1fL5KqnSW4TJba X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEzMDIzMSBTYWx0ZWRfX3fyRSPVv1JYM dB5pFsSAYujWpg2DQg/hwdkuNs7S5iXNdKjFodB+IGPEwuqKdXuoYoZKqp2KZ5fwLZk3NDGQwei veJmxo9J+FkMhX9USNdAy4RRob6NkaNsNBTKSgvv2OwutzQMiJnf+LCR2R1LCPDGN+Pq9V/uQhp tMG9Xq9/lbj/b3M0wX01rKKKawgRn3YLYlmGjXRIldPTP7lotFOZqGx3Iz3DmyHMFF2ArL19lKz U22m0Qq+LLxSLG+w9R4xmDGfqoqPCTPnZ+PulVS2Guu0AP9iSfQ+AATLryyBGNtsXk0pjaLG/W1 XEyIKiHrQRqm22fdge0vZkKfJNAgsoa4pAmy3tqEP0H8T8RnCTI8jJV1N4klYKC0mRA7Oiw7+fH Oh4NnWD/df7M0YvMsU3HR66rAYFa+uSPyExrEhO3DxNf6T+VihPQJJG+6J6g3erf7oKxjscvL8y yJYRS6HyB6ol5zCoiqw== X-Proofpoint-ORIG-GUID: c38y_lSWnKQKTJMTKe1fL5KqnSW4TJba X-Authority-Analysis: v=2.4 cv=dZSwG3Xe c=1 sm=1 tr=0 ts=6a556742 cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=6VQYfvmiyQ8t40WkS/mQdw==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=61LRw64o9f_II5JmnVkA:9 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEzMDIzMSBTYWx0ZWRfX56AXUCbLXQ6h axY+aggFzopXuLcug5EGzs9mfpDb5N3ukCxGxZdTWYUDe8VQUsmTi6Ub3JcCkWkR/tVYe6EUn3J XNMqxmqj1jFH9Qqx0RfdSFp/VC68lC0= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-13_05,2026-07-10_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 adultscore=0 malwarescore=0 spamscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607130231 On 7/5/2026 10:24 AM, Krzysztof Kozlowski wrote: > devm_clk_get() does not return NULL (only valid clock or ERR pointer), > so simplify the code to drop redundant IS_ERR_OR_NULL(). FWIW my AI review agent says: Under !CONFIG_HAVE_CLK (x86 COMPILE_TEST), devm_clk_get() returns NULL; IS_ERR(NULL) is false so clock_init() returns 0 with NULL clocks stored Perhaps the stub function in include/linux/clk.h should be updated to return an ERR_PTR() instead of NULL? > > Signed-off-by: Krzysztof Kozlowski > --- > drivers/net/wireless/ath/ath10k/ahb.c | 12 ++++++------ > 1 file changed, 6 insertions(+), 6 deletions(-) > > diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c > index eb8b35b6224d..7456f885d2b5 100644 > --- a/drivers/net/wireless/ath/ath10k/ahb.c > +++ b/drivers/net/wireless/ath/ath10k/ahb.c > @@ -87,24 +87,24 @@ static int ath10k_ahb_clock_init(struct ath10k *ar) > dev = &ar_ahb->pdev->dev; > > ar_ahb->cmd_clk = devm_clk_get(dev, "wifi_wcss_cmd"); > - if (IS_ERR_OR_NULL(ar_ahb->cmd_clk)) { > + if (IS_ERR(ar_ahb->cmd_clk)) { > ath10k_err(ar, "failed to get cmd clk: %ld\n", > PTR_ERR(ar_ahb->cmd_clk)); > - return ar_ahb->cmd_clk ? PTR_ERR(ar_ahb->cmd_clk) : -ENODEV; > + return PTR_ERR(ar_ahb->cmd_clk); > } > > ar_ahb->ref_clk = devm_clk_get(dev, "wifi_wcss_ref"); > - if (IS_ERR_OR_NULL(ar_ahb->ref_clk)) { > + if (IS_ERR(ar_ahb->ref_clk)) { > ath10k_err(ar, "failed to get ref clk: %ld\n", > PTR_ERR(ar_ahb->ref_clk)); > - return ar_ahb->ref_clk ? PTR_ERR(ar_ahb->ref_clk) : -ENODEV; > + return PTR_ERR(ar_ahb->ref_clk); > } > > ar_ahb->rtc_clk = devm_clk_get(dev, "wifi_wcss_rtc"); > - if (IS_ERR_OR_NULL(ar_ahb->rtc_clk)) { > + if (IS_ERR(ar_ahb->rtc_clk)) { > ath10k_err(ar, "failed to get rtc clk: %ld\n", > PTR_ERR(ar_ahb->rtc_clk)); > - return ar_ahb->rtc_clk ? PTR_ERR(ar_ahb->rtc_clk) : -ENODEV; > + return PTR_ERR(ar_ahb->rtc_clk); > } > > return 0;