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Sat, 01 Mar 2025 11:03:20 -0800 (PST) X-Relaying-Domain: purestorage.com Received: from dev-csander.dev.purestorage.com (dev-csander.dev.purestorage.com [10.7.70.37]) by c7-smtp-2023.dev.purestorage.com (Postfix) with ESMTP id E2EBC340314; Sat, 1 Mar 2025 12:03:18 -0700 (MST) Received: by dev-csander.dev.purestorage.com (Postfix, from userid 1557716354) id DCDEAE4164A; Sat, 1 Mar 2025 12:03:18 -0700 (MST) From: Caleb Sander Mateos To: Ming Lei , Jens Axboe Cc: Caleb Sander Mateos , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] ublk: don't cast registered buffer index to int Date: Sat, 1 Mar 2025 12:03:16 -0700 Message-ID: <20250301190317.950208-1-csander@purestorage.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" io_buffer_register_bvec() takes index as an unsigned int argument, but ublk_register_io_buf() casts ub_cmd->addr (a u64) to int. Remove the misleading cast and instead pass index as an unsigned value to ublk_register_io_buf() and ublk_unregister_io_buf(). Signed-off-by: Caleb Sander Mateos Reviewed-by: Ming Lei --- drivers/block/ublk_drv.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 512cbd456817..af5a4ff4bd3d 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -1760,16 +1760,15 @@ static void ublk_io_release(void *priv) ublk_put_req_ref(ubq, rq); } =20 static int ublk_register_io_buf(struct io_uring_cmd *cmd, struct ublk_queue *ubq, unsigned int tag, - const struct ublksrv_io_cmd *ub_cmd, - unsigned int issue_flags) + unsigned int index, unsigned int issue_flags) { struct ublk_device *ub =3D cmd->file->private_data; - int index =3D (int)ub_cmd->addr, ret; struct request *req; + int ret; =20 req =3D __ublk_check_and_get_req(ub, ubq, tag, 0); if (!req) return -EINVAL; =20 @@ -1782,14 +1781,13 @@ static int ublk_register_io_buf(struct io_uring_cmd= *cmd, =20 return 0; } =20 static int ublk_unregister_io_buf(struct io_uring_cmd *cmd, - const struct ublksrv_io_cmd *ub_cmd, - unsigned int issue_flags) + unsigned int index, unsigned int issue_flags) { - return io_buffer_unregister_bvec(cmd, ub_cmd->addr, issue_flags); + return io_buffer_unregister_bvec(cmd, index, issue_flags); } =20 static int __ublk_ch_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags, const struct ublksrv_io_cmd *ub_cmd) @@ -1840,13 +1838,13 @@ static int __ublk_ch_uring_cmd(struct io_uring_cmd = *cmd, goto out; =20 ret =3D -EINVAL; switch (_IOC_NR(cmd_op)) { case UBLK_IO_REGISTER_IO_BUF: - return ublk_register_io_buf(cmd, ubq, tag, ub_cmd, issue_flags); + return ublk_register_io_buf(cmd, ubq, tag, ub_cmd->addr, issue_flags); case UBLK_IO_UNREGISTER_IO_BUF: - return ublk_unregister_io_buf(cmd, ub_cmd, issue_flags); + return ublk_unregister_io_buf(cmd, ub_cmd->addr, issue_flags); case UBLK_IO_FETCH_REQ: /* UBLK_IO_FETCH_REQ is only allowed before queue is setup */ if (ublk_queue_ready(ubq)) { ret =3D -EBUSY; goto out; --=20 2.45.2