A quick comment, may come back later. See inline:
On Fri, May 28, 2021 at 02:57:53PM -0700, Russ Weight wrote:
> The FPGA manager class driver data structure is being treated as a
> managed resource instead of using standard dev_release call-back
> to release the class data structure. This change removes the
> managed resource code for the freeing of the class data structure
> and combines the create() and register() functions into a single
> register() function.
>
> The devm_fpga_mgr_register() function is retained.
>
> Signed-off-by: Russ Weight <russell.h.weight@xxxxxxxxx>
> ---
> v4:
> - Added the compat_id parameter to fpga_mgr_register() and
> devm_fpga_mgr_register() to ensure that the compat_id is set before
> the device_register() call.
> v3:
> - Cleaned up comment header for fpga_mgr_register()
> - Fix error return on ida_simple_get() failure
> v2:
> - Restored devm_fpga_mgr_register() functionality, adapted for the combined
> create/register functionality.
> - All previous callers of devm_fpga_mgr_register() will continue to call
> devm_fpga_mgr_register().
> - replaced unnecessary ternary operators in return statements with standard
> if conditions.
> ---
> drivers/fpga/altera-cvp.c | 12 +--
> drivers/fpga/altera-pr-ip-core.c | 9 +-
> drivers/fpga/altera-ps-spi.c | 10 +-
> drivers/fpga/dfl-fme-mgr.c | 12 +--
> drivers/fpga/fpga-mgr.c | 168 +++++++++----------------------
> drivers/fpga/ice40-spi.c | 10 +-
> drivers/fpga/machxo2-spi.c | 10 +-
> drivers/fpga/socfpga-a10.c | 16 ++-
> drivers/fpga/socfpga.c | 10 +-
> drivers/fpga/stratix10-soc.c | 15 +--
> drivers/fpga/ts73xx-fpga.c | 10 +-
> drivers/fpga/xilinx-spi.c | 12 +--
> drivers/fpga/zynq-fpga.c | 16 ++-
> drivers/fpga/zynqmp-fpga.c | 10 +-
> include/linux/fpga/fpga-mgr.h | 19 ++--
> 15 files changed, 120 insertions(+), 219 deletions(-)
>
> diff --git a/drivers/fpga/altera-cvp.c b/drivers/fpga/altera-cvp.c
> index 4e0edb60bfba..25eaa97ae7aa 100644
> --- a/drivers/fpga/altera-cvp.c
> +++ b/drivers/fpga/altera-cvp.c
> @@ -652,19 +652,15 @@ 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 = devm_fpga_mgr_create(&pdev->dev, conf->mgr_name,
> - &altera_cvp_ops, conf);
> - if (!mgr) {
> - ret = -ENOMEM;
> + mgr = fpga_mgr_register(&pdev->dev, conf->mgr_name, NULL,
> + &altera_cvp_ops, conf);
> + if (IS_ERR(mgr)) {
> + ret = PTR_ERR(mgr);
> goto err_unmap;
> }
>
> pci_set_drvdata(pdev, mgr);
>
> - ret = fpga_mgr_register(mgr);
> - if (ret)
> - goto err_unmap;
> -
> return 0;
>
> err_unmap:
> diff --git a/drivers/fpga/altera-pr-ip-core.c b/drivers/fpga/altera-pr-ip-core.c
> index 5b130c4d9882..bfd4de1e7ac5 100644
> --- a/drivers/fpga/altera-pr-ip-core.c
> +++ b/drivers/fpga/altera-pr-ip-core.c
> @@ -191,11 +191,12 @@ 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 = devm_fpga_mgr_create(dev, dev_name(dev), &alt_pr_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, dev_name(dev), NULL,
> + &alt_pr_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
> EXPORT_SYMBOL_GPL(alt_pr_register);
>
> diff --git a/drivers/fpga/altera-ps-spi.c b/drivers/fpga/altera-ps-spi.c
> index 23bfd4d1ad0f..e6fc7208213c 100644
> --- a/drivers/fpga/altera-ps-spi.c
> +++ b/drivers/fpga/altera-ps-spi.c
> @@ -302,12 +302,12 @@ 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 = devm_fpga_mgr_create(&spi->dev, conf->mgr_name,
> - &altera_ps_ops, conf);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(&spi->dev, conf->mgr_name, NULL,
> + &altera_ps_ops, conf);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(&spi->dev, mgr);
> + return 0;
> }
>
> static const struct spi_device_id altera_ps_spi_ids[] = {
> diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
> index d5861d13b306..c9b98afa7d50 100644
> --- a/drivers/fpga/dfl-fme-mgr.c
> +++ b/drivers/fpga/dfl-fme-mgr.c
> @@ -308,14 +308,12 @@ static int fme_mgr_probe(struct platform_device *pdev)
>
> fme_mgr_get_compat_id(priv->ioaddr, compat_id);
>
> - mgr = devm_fpga_mgr_create(dev, "DFL FME FPGA Manager",
> - &fme_mgr_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> -
> - mgr->compat_id = compat_id;
> + mgr = devm_fpga_mgr_register(dev, "DFL FME FPGA Manager", compat_id,
> + &fme_mgr_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static struct platform_driver fme_mgr_driver = {
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index b85bc47c91a9..d6d64ce34417 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -550,20 +550,22 @@ void fpga_mgr_unlock(struct fpga_manager *mgr)
> EXPORT_SYMBOL_GPL(fpga_mgr_unlock);
>
> /**
> - * fpga_mgr_create - create and initialize a FPGA manager struct
> + * fpga_mgr_register - create and register a FPGA Manager device
> * @dev: fpga manager device from pdev
> * @name: fpga manager name
> + * @compat_id: FPGA manager id for compatibility check.
> * @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.
> + * The caller of this function is responsible for calling fpga_mgr_unregister().
> + * Using devm_fpga_mgr_register instead is recommended.
> *
> - * Return: pointer to struct fpga_manager or NULL
> + * Return: struct fpga_manager pointer on success, ERR_PTR() on error.
> */
> -struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
> - const struct fpga_manager_ops *mops,
> - void *priv)
> +struct fpga_manager *
> +fpga_mgr_register(struct device *dev, const char *name,
> + struct fpga_compat_id *compat_id,
> + const struct fpga_manager_ops *mops, void *priv)
> {
> struct fpga_manager *mgr;
> int id, ret;
> @@ -572,29 +574,31 @@ struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
> !mops->write_init || (!mops->write && !mops->write_sg) ||
> (mops->write && mops->write_sg)) {
> dev_err(dev, "Attempt to register without fpga_manager_ops\n");
> - return NULL;
> + return ERR_PTR(-EINVAL);
> }
>
> if (!name || !strlen(name)) {
> dev_err(dev, "Attempt to register with no name!\n");
> - return NULL;
> + return ERR_PTR(-EINVAL);
> }
>
> mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
> if (!mgr)
> - return NULL;
> + return ERR_PTR(-ENOMEM);
>
> id = ida_simple_get(&fpga_mgr_ida, 0, 0, GFP_KERNEL);
> - if (id < 0)
> + if (id < 0) {
> + ret = id;
> goto error_kfree;
> + }
>
> mutex_init(&mgr->ref_mutex);
>
> mgr->name = name;
> + mgr->compat_id = compat_id;
> mgr->mops = mops;
> mgr->priv = priv;
>
> - device_initialize(&mgr->dev);
> mgr->dev.class = fpga_mgr_class;
> mgr->dev.groups = mops->groups;
> mgr->dev.parent = dev;
> @@ -605,84 +609,6 @@ struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
> if (ret)
> goto error_device;
>
> - return mgr;
> -
> -error_device:
> - ida_simple_remove(&fpga_mgr_ida, id);
> -error_kfree:
> - kfree(mgr);
> -
> - return NULL;
> -}
> -EXPORT_SYMBOL_GPL(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)
> -{
> - ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
> - kfree(mgr);
> -}
> -EXPORT_SYMBOL_GPL(fpga_mgr_free);
> -
> -static void devm_fpga_mgr_release(struct device *dev, void *res)
> -{
> - struct fpga_mgr_devres *dr = res;
> -
> - fpga_mgr_free(dr->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_mgr_devres *dr;
> -
> - dr = devres_alloc(devm_fpga_mgr_release, sizeof(*dr), GFP_KERNEL);
> - if (!dr)
> - return NULL;
> -
> - dr->mgr = fpga_mgr_create(dev, name, mops, priv);
> - if (!dr->mgr) {
> - devres_free(dr);
> - return NULL;
> - }
> -
> - devres_add(dev, dr);
> -
> - return dr->mgr;
> -}
> -EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
> -
> -/**
> - * fpga_mgr_register - register a FPGA manager
> - * @mgr: fpga manager struct
> - *
> - * Return: 0 on success, negative error code otherwise.
> - */
> -int fpga_mgr_register(struct fpga_manager *mgr)
> -{
> - int ret;
> -
> /*
> * Initialize framework state by requesting low level driver read state
> * from device. FPGA may be in reset mode or may have been programmed
> @@ -690,18 +616,20 @@ int fpga_mgr_register(struct fpga_manager *mgr)
> */
> mgr->state = mgr->mops->state(mgr);
>
> - ret = device_add(&mgr->dev);
> - if (ret)
> - goto error_device;
> -
> - dev_info(&mgr->dev, "%s registered\n", mgr->name);
> + ret = device_register(&mgr->dev);
> + if (ret) {
> + put_device(&mgr->dev);
> + return ERR_PTR(ret);
> + }
>
> - return 0;
> + return mgr;
>
> error_device:
> - ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
> + ida_simple_remove(&fpga_mgr_ida, id);
> +error_kfree:
> + kfree(mgr);
>
> - return ret;
> + return ERR_PTR(ret);
> }
> EXPORT_SYMBOL_GPL(fpga_mgr_register);
>
> @@ -726,14 +654,6 @@ void fpga_mgr_unregister(struct fpga_manager *mgr)
> }
> EXPORT_SYMBOL_GPL(fpga_mgr_unregister);
>
> -static int fpga_mgr_devres_match(struct device *dev, void *res,
> - void *match_data)
> -{
> - struct fpga_mgr_devres *dr = res;
> -
> - return match_data == dr->mgr;
> -}
> -
> static void devm_fpga_mgr_unregister(struct device *dev, void *res)
> {
> struct fpga_mgr_devres *dr = res;
> @@ -743,44 +663,46 @@ static void devm_fpga_mgr_unregister(struct device *dev, void *res)
>
> /**
> * devm_fpga_mgr_register - resource managed variant of fpga_mgr_register()
> - * @dev: managing device for this FPGA manager
> - * @mgr: fpga manager struct
> + * @dev: fpga manager device from pdev
> + * @name: fpga manager name
> + * @compat_id: FPGA manager id for compatibility check.
> + * @mops: pointer to structure of fpga manager ops
> + * @priv: fpga manager private data
> *
> * This is the devres variant of fpga_mgr_register() for which the unregister
> * function will be called automatically when the managing device is detached.
> */
> -int devm_fpga_mgr_register(struct device *dev, struct fpga_manager *mgr)
> +struct fpga_manager *
> +devm_fpga_mgr_register(struct device *dev, const char *name,
> + struct fpga_compat_id *compat_id,
> + const struct fpga_manager_ops *mops, void *priv)
> {
> struct fpga_mgr_devres *dr;
> - int ret;
> -
> - /*
> - * Make sure that the struct fpga_manager * that is passed in is
> - * managed itself.
> - */
> - if (WARN_ON(!devres_find(dev, devm_fpga_mgr_release,
> - fpga_mgr_devres_match, mgr)))
> - return -EINVAL;
> + struct fpga_manager *mgr;
>
> dr = devres_alloc(devm_fpga_mgr_unregister, sizeof(*dr), GFP_KERNEL);
> if (!dr)
> - return -ENOMEM;
> + return ERR_PTR(-ENOMEM);
>
> - ret = fpga_mgr_register(mgr);
> - if (ret) {
> + mgr = fpga_mgr_register(dev, name, compat_id, mops, priv);
> + if (IS_ERR(mgr)) {
> devres_free(dr);
> - return ret;
> + return mgr;
> }
>
> dr->mgr = mgr;
> devres_add(dev, dr);
>
> - return 0;
> + return mgr;
> }
> EXPORT_SYMBOL_GPL(devm_fpga_mgr_register);
>
> static void fpga_mgr_dev_release(struct device *dev)
> {
> + struct fpga_manager *mgr = to_fpga_manager(dev);
> +
> + ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
> + kfree(mgr);
> }
>
> static int __init fpga_mgr_class_init(void)
> diff --git a/drivers/fpga/ice40-spi.c b/drivers/fpga/ice40-spi.c
> index 69dec5af23c3..b1c7c0713e11 100644
> --- a/drivers/fpga/ice40-spi.c
> +++ b/drivers/fpga/ice40-spi.c
> @@ -178,12 +178,12 @@ static int ice40_fpga_probe(struct spi_device *spi)
> return ret;
> }
>
> - mgr = devm_fpga_mgr_create(dev, "Lattice iCE40 FPGA Manager",
> - &ice40_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Lattice iCE40 FPGA Manager",
> + NULL, &ice40_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id ice40_fpga_of_match[] = {
> diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
> index 114a64d2b7a4..75cc6efaa1b6 100644
> --- a/drivers/fpga/machxo2-spi.c
> +++ b/drivers/fpga/machxo2-spi.c
> @@ -366,12 +366,12 @@ static int machxo2_spi_probe(struct spi_device *spi)
> return -EINVAL;
> }
>
> - mgr = devm_fpga_mgr_create(dev, "Lattice MachXO2 SPI FPGA Manager",
> - &machxo2_ops, spi);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Lattice MachXO2 SPI FPGA Manager",
> + NULL, &machxo2_ops, spi);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id of_match[] = {
> diff --git a/drivers/fpga/socfpga-a10.c b/drivers/fpga/socfpga-a10.c
> index 573d88bdf730..80b8891fb302 100644
> --- a/drivers/fpga/socfpga-a10.c
> +++ b/drivers/fpga/socfpga-a10.c
> @@ -508,19 +508,15 @@ static int socfpga_a10_fpga_probe(struct platform_device *pdev)
> return -EBUSY;
> }
>
> - mgr = devm_fpga_mgr_create(dev, "SoCFPGA Arria10 FPGA Manager",
> - &socfpga_a10_fpga_mgr_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> -
> - platform_set_drvdata(pdev, mgr);
> -
> - ret = fpga_mgr_register(mgr);
> - if (ret) {
> + mgr = fpga_mgr_register(dev, "SoCFPGA Arria10 FPGA Manager",
> + NULL, &socfpga_a10_fpga_mgr_ops, priv);
> + if (IS_ERR(mgr)) {
> clk_disable_unprepare(priv->clk);
> - return ret;
> + return PTR_ERR(mgr);
> }
>
> + platform_set_drvdata(pdev, mgr);
> +
> return 0;
> }
>
> diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c
> index 1f467173fc1f..06edfab8a496 100644
> --- a/drivers/fpga/socfpga.c
> +++ b/drivers/fpga/socfpga.c
> @@ -571,12 +571,12 @@ static int socfpga_fpga_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> - mgr = devm_fpga_mgr_create(dev, "Altera SOCFPGA FPGA Manager",
> - &socfpga_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Altera SOCFPGA FPGA Manager",
> + NULL, &socfpga_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> #ifdef CONFIG_OF
> diff --git a/drivers/fpga/stratix10-soc.c b/drivers/fpga/stratix10-soc.c
> index 657a70c5fc99..434094c3ac69 100644
> --- a/drivers/fpga/stratix10-soc.c
> +++ b/drivers/fpga/stratix10-soc.c
> @@ -425,18 +425,11 @@ static int s10_probe(struct platform_device *pdev)
>
> init_completion(&priv->status_return_completion);
>
> - mgr = fpga_mgr_create(dev, "Stratix10 SOC FPGA Manager",
> - &s10_ops, priv);
> - if (!mgr) {
> - dev_err(dev, "unable to create FPGA manager\n");
> - ret = -ENOMEM;
> - goto probe_err;
> - }
> -
> - ret = fpga_mgr_register(mgr);
> - if (ret) {
> + mgr = fpga_mgr_register(dev, "Stratix10 SOC FPGA Manager",
> + NULL, &s10_ops, priv);
> + if (IS_ERR(mgr)) {
> dev_err(dev, "unable to register FPGA manager\n");
> - fpga_mgr_free(mgr);
> + ret = PTR_ERR(mgr);
> goto probe_err;
> }
>
> diff --git a/drivers/fpga/ts73xx-fpga.c b/drivers/fpga/ts73xx-fpga.c
> index 101f016c6ed8..5efbec2b9f9f 100644
> --- a/drivers/fpga/ts73xx-fpga.c
> +++ b/drivers/fpga/ts73xx-fpga.c
> @@ -122,12 +122,12 @@ static int ts73xx_fpga_probe(struct platform_device *pdev)
> if (IS_ERR(priv->io_base))
> return PTR_ERR(priv->io_base);
>
> - mgr = devm_fpga_mgr_create(kdev, "TS-73xx FPGA Manager",
> - &ts73xx_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(kdev, "TS-73xx FPGA Manager",
> + &ts73xx_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(kdev, mgr);
> + return 0;
> }
>
> static struct platform_driver ts73xx_fpga_driver = {
> diff --git a/drivers/fpga/xilinx-spi.c b/drivers/fpga/xilinx-spi.c
> index fee4d0abf6bf..6f1894929687 100644
> --- a/drivers/fpga/xilinx-spi.c
> +++ b/drivers/fpga/xilinx-spi.c
> @@ -247,13 +247,13 @@ static int xilinx_spi_probe(struct spi_device *spi)
> return dev_err_probe(&spi->dev, PTR_ERR(conf->done),
> "Failed to get DONE gpio\n");
>
> - mgr = devm_fpga_mgr_create(&spi->dev,
> - "Xilinx Slave Serial FPGA Manager",
> - &xilinx_spi_ops, conf);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(&spi->dev,
> + "Xilinx Slave Serial FPGA Manager",
> + NULL, &xilinx_spi_ops, conf);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(&spi->dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id xlnx_spi_of_match[] = {
> diff --git a/drivers/fpga/zynq-fpga.c b/drivers/fpga/zynq-fpga.c
> index 07fa8d9ec675..74bbb9710f4e 100644
> --- a/drivers/fpga/zynq-fpga.c
> +++ b/drivers/fpga/zynq-fpga.c
> @@ -609,20 +609,16 @@ static int zynq_fpga_probe(struct platform_device *pdev)
>
> clk_disable(priv->clk);
>
> - mgr = devm_fpga_mgr_create(dev, "Xilinx Zynq FPGA Manager",
> - &zynq_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> -
> - platform_set_drvdata(pdev, mgr);
> -
> - err = fpga_mgr_register(mgr);
> - if (err) {
> + mgr = fpga_mgr_register(dev, "Xilinx Zynq FPGA Manager",
> + &zynq_fpga_ops, priv);
> + if (IS_ERR(mgr)) {
> dev_err(dev, "unable to register FPGA manager\n");
> clk_unprepare(priv->clk);
> - return err;
> + return PTR_ERR(mgr);
> }
>
> + platform_set_drvdata(pdev, mgr);
> +
> return 0;
> }
>
> diff --git a/drivers/fpga/zynqmp-fpga.c b/drivers/fpga/zynqmp-fpga.c
> index 125743c9797f..1a6d520985be 100644
> --- a/drivers/fpga/zynqmp-fpga.c
> +++ b/drivers/fpga/zynqmp-fpga.c
> @@ -102,12 +102,12 @@ static int zynqmp_fpga_probe(struct platform_device *pdev)
>
> priv->dev = dev;
>
> - mgr = devm_fpga_mgr_create(dev, "Xilinx ZynqMP FPGA Manager",
> - &zynqmp_fpga_ops, priv);
> - if (!mgr)
> - return -ENOMEM;
> + mgr = devm_fpga_mgr_register(dev, "Xilinx ZynqMP FPGA Manager",
> + &zynqmp_fpga_ops, priv);
> + if (IS_ERR(mgr))
> + return PTR_ERR(mgr);
>
> - return devm_fpga_mgr_register(dev, mgr);
> + return 0;
> }
>
> static const struct of_device_id zynqmp_fpga_of_match[] = {
> diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
> index 2bc3030a69e5..3e1859cc0640 100644
> --- a/include/linux/fpga/fpga-mgr.h
> +++ b/include/linux/fpga/fpga-mgr.h
> @@ -191,17 +191,16 @@ struct fpga_manager *fpga_mgr_get(struct device *dev);
>
> void fpga_mgr_put(struct fpga_manager *mgr);
>
> -struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
> - const struct fpga_manager_ops *mops,
> - void *priv);
> -void fpga_mgr_free(struct fpga_manager *mgr);
> -int fpga_mgr_register(struct fpga_manager *mgr);
> +struct fpga_manager *fpga_mgr_register(struct device *dev, const char *name,
> + struct fpga_compat_id *compat_id,
> + const struct fpga_manager_ops *mops,
> + void *priv);
> void fpga_mgr_unregister(struct fpga_manager *mgr);
>
> -int devm_fpga_mgr_register(struct device *dev, 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);
> +struct fpga_manager *
> +devm_fpga_mgr_register(struct device *dev, const char *name,
> + struct fpga_compat_id *compat_id,
Could we integrate the compat_id in fpga_manager_ops? Actually not much
driver cares about the compat_id.
In this way we don't force everyone fill a NULL on registration.
Expecting more opinions.
Thanks,
Yilun
> + const struct fpga_manager_ops *mops,
> + void *priv);
>
> #endif /*_LINUX_FPGA_MGR_H */
> --
> 2.25.1
