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Thu, 11 Apr 2024 08:35:59 -0700 (PDT) Received: from localhost.localdomain ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id jc25-20020a056638891900b0047f14b7f6c0sm457056jab.5.2024.04.11.08.35.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Apr 2024 08:35:57 -0700 (PDT) From: Jens Axboe To: linux-kernel@vger.kernel.org Cc: Jens Axboe Subject: [PATCH 153/437] drivers/dma: convert to read/write iterators Date: Thu, 11 Apr 2024 09:14:53 -0600 Message-ID: <20240411153126.16201-154-axboe@kernel.dk> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240411153126.16201-1-axboe@kernel.dk> References: <20240411153126.16201-1-axboe@kernel.dk> 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" Signed-off-by: Jens Axboe --- drivers/dma/xilinx/xilinx_dpdma.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/dma/xilinx/xilinx_dpdma.c b/drivers/dma/xilinx/xilinx_= dpdma.c index b82815e64d24..8a443cd0cd44 100644 --- a/drivers/dma/xilinx/xilinx_dpdma.c +++ b/drivers/dma/xilinx/xilinx_dpdma.c @@ -354,14 +354,14 @@ static struct xilinx_dpdma_debugfs_request dpdma_debu= gfs_reqs[] =3D { }, }; =20 -static ssize_t xilinx_dpdma_debugfs_read(struct file *f, char __user *buf, - size_t size, loff_t *pos) +static ssize_t xilinx_dpdma_debugfs_read(struct kiocb *iocb, struct iov_it= er *to) { enum xilinx_dpdma_testcases testcase; + size_t size =3D iov_iter_count(to); char *kern_buff; int ret =3D 0; =20 - if (*pos !=3D 0 || size <=3D 0) + if (iocb->ki_pos !=3D 0 || size <=3D 0) return -EINVAL; =20 kern_buff =3D kzalloc(XILINX_DPDMA_DEBUGFS_READ_MAX_SIZE, GFP_KERNEL); @@ -381,7 +381,7 @@ static ssize_t xilinx_dpdma_debugfs_read(struct file *f= , char __user *buf, } =20 size =3D min(size, strlen(kern_buff)); - if (copy_to_user(buf, kern_buff, size)) + if (!copy_to_iter_full(kern_buff, size, to)) ret =3D -EFAULT; =20 done: @@ -389,7 +389,7 @@ static ssize_t xilinx_dpdma_debugfs_read(struct file *f= , char __user *buf, if (ret) return ret; =20 - *pos =3D size + 1; + iocb->ki_pos =3D size + 1; return size; } =20 @@ -441,11 +441,12 @@ static ssize_t xilinx_dpdma_debugfs_write(struct file= *f, kfree(kern_buff_start); return ret; } +FOPS_WRITE_ITER_HELPER(xilinx_dpdma_debugfs_write); =20 static const struct file_operations fops_xilinx_dpdma_dbgfs =3D { .owner =3D THIS_MODULE, - .read =3D xilinx_dpdma_debugfs_read, - .write =3D xilinx_dpdma_debugfs_write, + .read_iter =3D xilinx_dpdma_debugfs_read, + .write_iter =3D xilinx_dpdma_debugfs_write_iter, }; =20 static void xilinx_dpdma_debugfs_init(struct xilinx_dpdma_device *xdev) --=20 2.43.0