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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3712fcb2607sm8713835a91.0.2026.06.08.20.00.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jun 2026 20:00:07 -0700 (PDT) From: Jianping Li To: Srinivas Kandagatla , Amol Maheshwari Cc: Ekansh Gupta , Arnd Bergmann , Greg Kroah-Hartman , Abel Vesa , Jorge Ramirez-Ortiz , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, quic_chennak@quicinc.com, Dmitry Baryshkov , Jianping Li Subject: [PATCH v8 4/4] misc: fastrpc: Allow fastrpc_buf_free() to accept NULL Date: Tue, 9 Jun 2026 10:59:38 +0800 Message-Id: <20260609025938.457-5-jianping.li@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260609025938.457-1-jianping.li@oss.qualcomm.com> References: <20260609025938.457-1-jianping.li@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=cverVV4i c=1 sm=1 tr=0 ts=6a2781b9 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=XYmfcRj0Jzm9BuThv0sA:9 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-ORIG-GUID: 0KfthYb031xc1vfz7MXMWpGLHqNBbBkY X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjA5MDAyNSBTYWx0ZWRfXxfTuf16kch+O 2Z68vRy5TVVjqz8N3Y/bE6Bkhv9avpbqW/WFy9FqKYkOdlqgdTio+fRso/emmon7kSomVey+YXN nOvoUokdAAPm/600Zvoq+Msx2U4aExYitOy4wJQj6/ll2wylS4ryiw+SUJG/UiRfzewVfWCZDiD t1c3f/OZUJ9MdZJ1FXH+EncrFTdq3MUWOFE1hN8UTIqLUMs9vnY+CL6bTTT76MartKOo2AH9yeW UeE1F35sbZdMpmV1Mz6KNmNCiJ75h2l89Cuwez/wT4gwMmMgEPh4sPfRHliGUkJiUjuiZ+LRYUW YuFz43Dia8FK/+C07J68LJgVHGozxoVDDqV2JzXDqmDnownevij6haIEqoMtxXOugjMZtVNFOyQ sAuscsqTogQQLKSDZsu5etxKm9if2zMEBj6wa5D35yvyymXqubO8MoOgU3whxEdGZj0iR315cgm uS0NZWO7Y5K1zqSQ2oA== X-Proofpoint-GUID: 0KfthYb031xc1vfz7MXMWpGLHqNBbBkY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-08_06,2026-06-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 bulkscore=0 clxscore=1015 impostorscore=0 suspectscore=0 priorityscore=1501 phishscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606090025 From: Ekansh Gupta Make fastrpc_buf_free() a no-op when passed a NULL pointer, allowing callers to avoid open-coded NULL checks. Reviewed-by: Dmitry Baryshkov Signed-off-by: Ekansh Gupta Signed-off-by: Jianping Li --- drivers/misc/fastrpc.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 1942e74535e5..b4912b443b98 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -424,6 +424,9 @@ static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd, static void fastrpc_buf_free(struct fastrpc_buf *buf) { + if (!buf) + return; + dma_free_coherent(buf->dev, buf->size, buf->virt, fastrpc_ipa_to_dma_addr(buf->fl->cctx, buf->dma_addr)); kfree(buf); @@ -516,8 +519,7 @@ static void fastrpc_user_free(struct kref *ref) struct fastrpc_map *map, *m; struct fastrpc_buf *buf, *b; - if (fl->init_mem) - fastrpc_buf_free(fl->init_mem); + fastrpc_buf_free(fl->init_mem); list_for_each_entry_safe(ctx, n, &fl->pending, node) { list_del(&ctx->node); @@ -562,8 +564,7 @@ static void fastrpc_context_free(struct kref *ref) for (i = 0; i < ctx->nbufs; i++) fastrpc_map_put(ctx->maps[i]); - if (ctx->buf) - fastrpc_buf_free(ctx->buf); + fastrpc_buf_free(ctx->buf); spin_lock_irqsave(&cctx->lock, flags); idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); -- 2.43.0