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SubjectRe: [PATCH v3 1/4] fpga: mgr: add devm_fpga_mgr_create
Date
not comment here

On Monday, October 15, 2018 4:54:25 PM CEST Alan Tull wrote:
> On Wed, Sep 26, 2018 at 11:12 AM Alan Tull <atull@kernel.org> wrote:
>
> Any other comments on this patchset?
>
> Alan
>
> > Add devm_fpga_mgr_create() which is the managed
> > version of fpga_mgr_create().
> >
> > Change current FPGA manager drivers to use
> > devm_fpga_mgr_create()
> >
> > Signed-off-by: Alan Tull <atull@kernel.org>
> > Suggested-by: Federico Vaga <federico.vaga@cern.ch>
> > ---
> > v2: add suggested-by
> > v3: remove some unclear documentation about fpga_mgr_unregister
> > ---
> >
> > Documentation/driver-api/fpga/fpga-mgr.rst | 13 +++---
> > drivers/fpga/altera-cvp.c | 8 ++--
> > drivers/fpga/altera-pr-ip-core.c | 9 +----
> > drivers/fpga/altera-ps-spi.c | 11 ++---
> > drivers/fpga/dfl-fme-mgr.c | 11 ++---
> > drivers/fpga/fpga-mgr.c | 64
> > ++++++++++++++++++++++++++---- drivers/fpga/ice40-spi.c
> > | 10 ++---
> > drivers/fpga/machxo2-spi.c | 11 ++---
> > drivers/fpga/socfpga-a10.c | 5 +--
> > drivers/fpga/socfpga.c | 10 ++---
> > drivers/fpga/ts73xx-fpga.c | 11 ++---
> > drivers/fpga/xilinx-spi.c | 12 ++----
> > drivers/fpga/zynq-fpga.c | 5 +--
> > include/linux/fpga/fpga-mgr.h | 4 ++
> > 14 files changed, 97 insertions(+), 87 deletions(-)
> >
> > diff --git a/Documentation/driver-api/fpga/fpga-mgr.rst
> > b/Documentation/driver-api/fpga/fpga-mgr.rst index 82b6dbb..db8885e
> > 100644
> > --- a/Documentation/driver-api/fpga/fpga-mgr.rst
> > +++ b/Documentation/driver-api/fpga/fpga-mgr.rst
> >
> > @@ -49,18 +49,14 @@ probe function calls fpga_mgr_register(), such as::
> > * them in priv
> > */
> >
> > - mgr = fpga_mgr_create(dev, "Altera SOCFPGA FPGA Manager",
> > - &socfpga_fpga_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, "Altera SOCFPGA FPGA
> > Manager", + &socfpga_fpga_ops,
> > priv);>
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > platform_set_drvdata(pdev, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int socfpga_fpga_remove(struct platform_device *pdev)
> >
> > @@ -170,6 +166,9 @@ API for implementing a new FPGA Manager driver
> >
> > :functions: fpga_manager_ops
> >
> > .. kernel-doc:: drivers/fpga/fpga-mgr.c
> >
> > + :functions: devm_fpga_mgr_create
> > +
> > +.. kernel-doc:: drivers/fpga/fpga-mgr.c
> >
> > :functions: fpga_mgr_create
> >
> > .. kernel-doc:: drivers/fpga/fpga-mgr.c
> >
> > diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c
> > index 7fa7936..610a155 100644
> > --- a/drivers/fpga/altera-cvp.c
> > +++ b/drivers/fpga/altera-cvp.c
> > @@ -453,8 +453,8 @@ static int altera_cvp_probe(struct pci_dev *pdev,
> >
> > snprintf(conf->mgr_name, sizeof(conf->mgr_name), "%s @%s",
> >
> > ALTERA_CVP_MGR_NAME, pci_name(pdev));
> >
> > - mgr = fpga_mgr_create(&pdev->dev, conf->mgr_name,
> > - &altera_cvp_ops, conf);
> > + mgr = devm_fpga_mgr_create(&pdev->dev, conf->mgr_name,
> > + &altera_cvp_ops, conf);
> >
> > if (!mgr) {
> >
> > ret = -ENOMEM;
> > goto err_unmap;
> >
> > @@ -463,10 +463,8 @@ static int altera_cvp_probe(struct pci_dev *pdev,
> >
> > pci_set_drvdata(pdev, mgr);
> >
> > ret = fpga_mgr_register(mgr);
> >
> > - if (ret) {
> > - fpga_mgr_free(mgr);
> > + if (ret)
> >
> > goto err_unmap;
> >
> > - }
> >
> > ret = driver_create_file(&altera_cvp_driver.driver,
> >
> > &driver_attr_chkcfg);
> >
> > diff --git a/drivers/fpga/altera-pr-ip-core.c
> > b/drivers/fpga/altera-pr-ip-core.c index 65e0b6a..a7a3bf0 100644
> > --- a/drivers/fpga/altera-pr-ip-core.c
> > +++ b/drivers/fpga/altera-pr-ip-core.c
> > @@ -177,7 +177,6 @@ int alt_pr_register(struct device *dev, void __iomem
> > *reg_base)>
> > {
> >
> > struct alt_pr_priv *priv;
> > struct fpga_manager *mgr;
> >
> > - int ret;
> >
> > u32 val;
> >
> > priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> >
> > @@ -192,17 +191,13 @@ int alt_pr_register(struct device *dev, void __iomem
> > *reg_base)>
> > (val & ALT_PR_CSR_STATUS_MSK) >> ALT_PR_CSR_STATUS_SFT,
> > (int)(val & ALT_PR_CSR_PR_START));
> >
> > - mgr = fpga_mgr_create(dev, dev_name(dev), &alt_pr_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, dev_name(dev), &alt_pr_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > dev_set_drvdata(dev, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> > EXPORT_SYMBOL_GPL(alt_pr_register);
> >
> > diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c
> > index 24b25c6..33aafda 100644
> > --- a/drivers/fpga/altera-ps-spi.c
> > +++ b/drivers/fpga/altera-ps-spi.c
> > @@ -239,7 +239,6 @@ static int altera_ps_probe(struct spi_device *spi)
> >
> > struct altera_ps_conf *conf;
> > const struct of_device_id *of_id;
> > struct fpga_manager *mgr;
> >
> > - int ret;
> >
> > conf = devm_kzalloc(&spi->dev, sizeof(*conf), GFP_KERNEL);
> > if (!conf)
> >
> > @@ -275,18 +274,14 @@ static int altera_ps_probe(struct spi_device *spi)
> >
> > snprintf(conf->mgr_name, sizeof(conf->mgr_name), "%s %s",
> >
> > dev_driver_string(&spi->dev), dev_name(&spi->dev));
> >
> > - mgr = fpga_mgr_create(&spi->dev, conf->mgr_name,
> > - &altera_ps_ops, conf);
> > + mgr = devm_fpga_mgr_create(&spi->dev, conf->mgr_name,
> > + &altera_ps_ops, conf);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > spi_set_drvdata(spi, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int altera_ps_remove(struct spi_device *spi)
> >
> > diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
> > index 9f045d0..76f3770 100644
> > --- a/drivers/fpga/dfl-fme-mgr.c
> > +++ b/drivers/fpga/dfl-fme-mgr.c
> > @@ -287,7 +287,6 @@ static int fme_mgr_probe(struct platform_device *pdev)
> >
> > struct fme_mgr_priv *priv;
> > struct fpga_manager *mgr;
> > struct resource *res;
> >
> > - int ret;
> >
> > priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> > if (!priv)
> >
> > @@ -309,19 +308,15 @@ static int fme_mgr_probe(struct platform_device
> > *pdev)>
> > fme_mgr_get_compat_id(priv->ioaddr, compat_id);
> >
> > - mgr = fpga_mgr_create(dev, "DFL FME FPGA Manager",
> > - &fme_mgr_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, "DFL FME FPGA Manager",
> > + &fme_mgr_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > mgr->compat_id = compat_id;
> > platform_set_drvdata(pdev, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int fme_mgr_remove(struct platform_device *pdev)
> >
> > diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> > index a41b07e..c386681 100644
> > --- a/drivers/fpga/fpga-mgr.c
> > +++ b/drivers/fpga/fpga-mgr.c
> > @@ -558,6 +558,9 @@ EXPORT_SYMBOL_GPL(fpga_mgr_unlock);
> >
> > * @mops: pointer to structure of fpga manager ops
> > * @priv: fpga manager private data
> > *
> >
> > + * The caller of this function is responsible for freeing the struct with
> > + * fpga_mgr_free(). Using devm_fpga_mgr_create() instead is recommended.
> > + *
> >
> > * Return: pointer to struct fpga_manager or NULL
> > */
> >
> > struct fpga_manager *fpga_mgr_create(struct device *dev, const char
> > *name,
> >
> > @@ -618,8 +621,8 @@ struct fpga_manager *fpga_mgr_create(struct device
> > *dev, const char *name,>
> > EXPORT_SYMBOL_GPL(fpga_mgr_create);
> >
> > /**
> >
> > - * fpga_mgr_free - deallocate a FPGA manager
> > - * @mgr: fpga manager struct created by fpga_mgr_create
> > + * fpga_mgr_free - free a FPGA manager created with fpga_mgr_create()
> > + * @mgr: fpga manager struct
> >
> > */
> >
> > void fpga_mgr_free(struct fpga_manager *mgr)
> > {
> >
> > @@ -628,9 +631,55 @@ void fpga_mgr_free(struct fpga_manager *mgr)
> >
> > }
> > EXPORT_SYMBOL_GPL(fpga_mgr_free);
> >
> > +static void devm_fpga_mgr_release(struct device *dev, void *res)
> > +{
> > + struct fpga_manager *mgr = *(struct fpga_manager **)res;
> > +
> > + fpga_mgr_free(mgr);
> > +}
> > +
> > +/**
> > + * devm_fpga_mgr_create - create and initialize a managed FPGA manager
> > struct + * @dev: fpga manager device from pdev
> > + * @name: fpga manager name
> > + * @mops: pointer to structure of fpga manager ops
> > + * @priv: fpga manager private data
> > + *
> > + * This function is intended for use in a FPGA manager driver's probe
> > function. + * After the manager driver creates the manager struct with
> > + * devm_fpga_mgr_create(), it should register it with
> > fpga_mgr_register(). The + * manager driver's remove function should
> > call fpga_mgr_unregister(). The + * manager struct allocated with this
> > function will be freed automatically on + * driver detach. This includes
> > the case of a probe function returning error + * before calling
> > fpga_mgr_register(), the struct will still get cleaned up. + *
> > + * Return: pointer to struct fpga_manager or NULL
> > + */
> > +struct fpga_manager *devm_fpga_mgr_create(struct device *dev, const char
> > *name, + const struct
> > fpga_manager_ops *mops, + void
> > *priv)
> > +{
> > + struct fpga_manager **ptr, *mgr;
> > +
> > + ptr = devres_alloc(devm_fpga_mgr_release, sizeof(*ptr),
> > GFP_KERNEL); + if (!ptr)
> > + return NULL;
> > +
> > + mgr = fpga_mgr_create(dev, name, mops, priv);
> > + if (!mgr) {
> > + devres_free(ptr);
> > + } else {
> > + *ptr = mgr;
> > + devres_add(dev, ptr);
> > + }
> > +
> > + return mgr;
> > +}
> > +EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
> > +
> >
> > /**
> >
> > * fpga_mgr_register - register a FPGA manager
> >
> > - * @mgr: fpga manager struct created by fpga_mgr_create
> > + * @mgr: fpga manager struct
> >
> > *
> > * Return: 0 on success, negative error code otherwise.
> > */
> >
> > @@ -661,8 +710,10 @@ int fpga_mgr_register(struct fpga_manager *mgr)
> >
> > EXPORT_SYMBOL_GPL(fpga_mgr_register);
> >
> > /**
> >
> > - * fpga_mgr_unregister - unregister and free a FPGA manager
> > - * @mgr: fpga manager struct
> > + * fpga_mgr_unregister - unregister a FPGA manager
> > + * @mgr: fpga manager struct
> > + *
> > + * This function is intended for use in a FPGA manager driver's remove
> > function.>
> > */
> >
> > void fpga_mgr_unregister(struct fpga_manager *mgr)
> > {
> >
> > @@ -681,9 +732,6 @@ EXPORT_SYMBOL_GPL(fpga_mgr_unregister);
> >
> > static void fpga_mgr_dev_release(struct device *dev)
> > {
> >
> > - struct fpga_manager *mgr = to_fpga_manager(dev);
> > -
> > - fpga_mgr_free(mgr);
> >
> > }
> >
> > static int __init fpga_mgr_class_init(void)
> >
> > diff --git a/drivers/fpga/ice40-spi.c b/drivers/fpga/ice40-spi.c
> > index 5981c7e..6154661 100644
> > --- a/drivers/fpga/ice40-spi.c
> > +++ b/drivers/fpga/ice40-spi.c
> > @@ -175,18 +175,14 @@ static int ice40_fpga_probe(struct spi_device *spi)
> >
> > return ret;
> >
> > }
> >
> > - mgr = fpga_mgr_create(dev, "Lattice iCE40 FPGA Manager",
> > - &ice40_fpga_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, "Lattice iCE40 FPGA Manager",
> > + &ice40_fpga_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > spi_set_drvdata(spi, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int ice40_fpga_remove(struct spi_device *spi)
> >
> > diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
> > index a582e00..4d8a876 100644
> > --- a/drivers/fpga/machxo2-spi.c
> > +++ b/drivers/fpga/machxo2-spi.c
> > @@ -356,25 +356,20 @@ static int machxo2_spi_probe(struct spi_device *spi)
> >
> > {
> >
> > struct device *dev = &spi->dev;
> > struct fpga_manager *mgr;
> >
> > - int ret;
> >
> > if (spi->max_speed_hz > MACHXO2_MAX_SPEED) {
> >
> > dev_err(dev, "Speed is too high\n");
> > return -EINVAL;
> >
> > }
> >
> > - mgr = fpga_mgr_create(dev, "Lattice MachXO2 SPI FPGA Manager",
> > - &machxo2_ops, spi);
> > + mgr = devm_fpga_mgr_create(dev, "Lattice MachXO2 SPI FPGA
> > Manager",
> > + &machxo2_ops, spi);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > spi_set_drvdata(spi, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int machxo2_spi_remove(struct spi_device *spi)
> >
> > diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c
> > index be30c48..573d88b 100644
> > --- a/drivers/fpga/socfpga-a10.c
> > +++ b/drivers/fpga/socfpga-a10.c
> > @@ -508,8 +508,8 @@ static int socfpga_a10_fpga_probe(struct
> > platform_device *pdev)>
> > return -EBUSY;
> >
> > }
> >
> > - mgr = fpga_mgr_create(dev, "SoCFPGA Arria10 FPGA Manager",
> > - &socfpga_a10_fpga_mgr_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, "SoCFPGA Arria10 FPGA Manager",
> > + &socfpga_a10_fpga_mgr_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > @@ -517,7 +517,6 @@ static int socfpga_a10_fpga_probe(struct
> > platform_device *pdev)>
> > ret = fpga_mgr_register(mgr);
> > if (ret) {
> >
> > - fpga_mgr_free(mgr);
> >
> > clk_disable_unprepare(priv->clk);
> > return ret;
> >
> > }
> >
> > diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c
> > index 959d71f..4a8a2fc 100644
> > --- a/drivers/fpga/socfpga.c
> > +++ b/drivers/fpga/socfpga.c
> > @@ -571,18 +571,14 @@ static int socfpga_fpga_probe(struct platform_device
> > *pdev)>
> > if (ret)
> >
> > return ret;
> >
> > - mgr = fpga_mgr_create(dev, "Altera SOCFPGA FPGA Manager",
> > - &socfpga_fpga_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, "Altera SOCFPGA FPGA Manager",
> > + &socfpga_fpga_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > platform_set_drvdata(pdev, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int socfpga_fpga_remove(struct platform_device *pdev)
> >
> > diff --git a/drivers/fpga/ts73xx-fpga.c b/drivers/fpga/ts73xx-fpga.c
> > index 08efd18..dc22a58 100644
> > --- a/drivers/fpga/ts73xx-fpga.c
> > +++ b/drivers/fpga/ts73xx-fpga.c
> > @@ -118,7 +118,6 @@ static int ts73xx_fpga_probe(struct platform_device
> > *pdev)>
> > struct ts73xx_fpga_priv *priv;
> > struct fpga_manager *mgr;
> > struct resource *res;
> >
> > - int ret;
> >
> > priv = devm_kzalloc(kdev, sizeof(*priv), GFP_KERNEL);
> > if (!priv)
> >
> > @@ -133,18 +132,14 @@ static int ts73xx_fpga_probe(struct platform_device
> > *pdev)>
> > return PTR_ERR(priv->io_base);
> >
> > }
> >
> > - mgr = fpga_mgr_create(kdev, "TS-73xx FPGA Manager",
> > - &ts73xx_fpga_ops, priv);
> > + mgr = devm_fpga_mgr_create(kdev, "TS-73xx FPGA Manager",
> > + &ts73xx_fpga_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > platform_set_drvdata(pdev, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int ts73xx_fpga_remove(struct platform_device *pdev)
> >
> > diff --git a/drivers/fpga/xilinx-spi.c b/drivers/fpga/xilinx-spi.c
> > index 8d19459..469486b 100644
> > --- a/drivers/fpga/xilinx-spi.c
> > +++ b/drivers/fpga/xilinx-spi.c
> > @@ -144,7 +144,6 @@ static int xilinx_spi_probe(struct spi_device *spi)
> >
> > {
> >
> > struct xilinx_spi_conf *conf;
> > struct fpga_manager *mgr;
> >
> > - int ret;
> >
> > conf = devm_kzalloc(&spi->dev, sizeof(*conf), GFP_KERNEL);
> > if (!conf)
> >
> > @@ -167,18 +166,15 @@ static int xilinx_spi_probe(struct spi_device *spi)
> >
> > return PTR_ERR(conf->done);
> >
> > }
> >
> > - mgr = fpga_mgr_create(&spi->dev, "Xilinx Slave Serial FPGA
> > Manager", - &xilinx_spi_ops, conf);
> > + mgr = devm_fpga_mgr_create(&spi->dev,
> > + "Xilinx Slave Serial FPGA Manager",
> > + &xilinx_spi_ops, conf);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > spi_set_drvdata(spi, mgr);
> >
> > - ret = fpga_mgr_register(mgr);
> > - if (ret)
> > - fpga_mgr_free(mgr);
> > -
> > - return ret;
> > + return fpga_mgr_register(mgr);
> >
> > }
> >
> > static int xilinx_spi_remove(struct spi_device *spi)
> >
> > diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c
> > index 3110e00..bb82efe 100644
> > --- a/drivers/fpga/zynq-fpga.c
> > +++ b/drivers/fpga/zynq-fpga.c
> > @@ -614,8 +614,8 @@ static int zynq_fpga_probe(struct platform_device
> > *pdev)>
> > clk_disable(priv->clk);
> >
> > - mgr = fpga_mgr_create(dev, "Xilinx Zynq FPGA Manager",
> > - &zynq_fpga_ops, priv);
> > + mgr = devm_fpga_mgr_create(dev, "Xilinx Zynq FPGA Manager",
> > + &zynq_fpga_ops, priv);
> >
> > if (!mgr)
> >
> > return -ENOMEM;
> >
> > @@ -624,7 +624,6 @@ static int zynq_fpga_probe(struct platform_device
> > *pdev)>
> > err = fpga_mgr_register(mgr);
> > if (err) {
> >
> > dev_err(dev, "unable to register FPGA manager\n");
> >
> > - fpga_mgr_free(mgr);
> >
> > clk_unprepare(priv->clk);
> > return err;
> >
> > }
> >
> > diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
> > index 8ab5df7..e8ca62b 100644
> > --- a/include/linux/fpga/fpga-mgr.h
> > +++ b/include/linux/fpga/fpga-mgr.h
> > @@ -198,4 +198,8 @@ void fpga_mgr_free(struct fpga_manager *mgr);
> >
> > int fpga_mgr_register(struct fpga_manager *mgr);
> > void fpga_mgr_unregister(struct fpga_manager *mgr);
> >
> > +struct fpga_manager *devm_fpga_mgr_create(struct device *dev, const char
> > *name, + const struct
> > fpga_manager_ops *mops, + void
> > *priv);
> > +
> >
> > #endif /*_LINUX_FPGA_MGR_H */
> >
> > --
> > 2.7.4




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