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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-36a72c4ce6bsm12104253a91.11.2026.05.26.04.11.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2026 04:12:02 -0700 (PDT) From: Jianping Li To: srini@kernel.org, amahesh@qti.qualcomm.com, arnd@arndb.de, gregkh@linuxfoundation.org, abelvesa@kernel.org, jorge.ramirez@oss.qualcomm.com Cc: Ekansh Gupta , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, quic_chennak@quicinc.com, Jianping Li Subject: [PATCH v6 5/5] misc: fastrpc: Allow fastrpc_buf_free() to accept NULL Date: Tue, 26 May 2026 19:11:24 +0800 Message-Id: <20260526111124.515-6-jianping.li@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260526111124.515-1-jianping.li@oss.qualcomm.com> References: <20260526111124.515-1-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-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTI2MDA5NyBTYWx0ZWRfX4Eqncjd5A0qh 9hSIyLeIKuCdz/xrag4pzlW8HzY3KRbAcNn23ph1p5v/xn3Ts7hUrOFvpHGEttkQtvp/p9Fc9Y9 7r+/CuKiKtdqrfGieQq3nE6yDmaKkYJJoQW48xqIpywCQuM0X6c+YIJre3ZFFPDCi4Nek6T1Lbz Kwb+zqq0VCCwCp5G3eaAxLIX4Blqc81ah92XlWNbo8R8bshfG6avA1c+HSDwnjIj6t/AB1HXFVF z3vJGdlk721LYFkwNaOqxmnEuWdgXih0Pp6Rscn8BzBOBUJbtiejhIv+7U6PUhrt3XlZQtPQUga 6HEU2OtS67lmNDFQBPv/hJoK2UcmAG3oOpIdTLGOUKGLd5IfGMTgCykCFEpX0Q4sjaY+7v3IvjC IspyvgNiA6pQxgkD4z+qoS037SiqaLeZnJZT5RjlIH8Cd8P8ulVjyy+7P+CjBdbQa4X9eeEyAXS uYgLPL0oMy7iQP11Pig== X-Authority-Analysis: v=2.4 cv=Zc4t8MVA c=1 sm=1 tr=0 ts=6a158004 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=Dpl4kN4VNrDjC7DZWhsA:9 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-ORIG-GUID: NPhmnjmmkGMifcaURVr4ofe_7J1Y3ktO X-Proofpoint-GUID: NPhmnjmmkGMifcaURVr4ofe_7J1Y3ktO 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=2026-05-26_02,2026-05-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 impostorscore=0 bulkscore=0 adultscore=0 phishscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605260097 From: Ekansh Gupta Make fastrpc_buf_free() a no-op when passed a NULL pointer, allowing callers to avoid open-coded NULL checks. 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 0208208c2d27..6f3cb4934156 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -418,6 +418,9 @@ 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); @@ -510,8 +513,7 @@ 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); @@ -556,8 +558,7 @@ 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