From: Tom Rix <trix@redhat.com>
To: Moritz Fischer <mdf@kernel.org>, linux-fpga@vger.kernel.org
Cc: hao.wu@intel.com, michal.simek@xilinx.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, russell.h.weight@intel.com,
matthew.gerlach@intel.com
Subject: Re: [PATCH 01/10] fpga: fpga-mgr: Add devm_fpga_mgr_register() API
Date: Sun, 4 Oct 2020 11:08:11 -0700 [thread overview]
Message-ID: <b00ad633-8703-8d1f-d5fe-c4483cd19b79@redhat.com> (raw)
In-Reply-To: <20201004051423.75879-2-mdf@kernel.org>
On 10/3/20 10:14 PM, Moritz Fischer wrote:
> Add a devm_fpga_mgr_register() API that can be used to register a FPGA
> Manager that was created using devm_fpga_mgr_create().
>
> Introduce a struct fpga_mgr_devres that makes the devres
> allocation a little bit more readable and gets reused for
> devm_fpga_mgr_create() devm_fpga_mgr_register().
>
> Signed-off-by: Moritz Fischer <mdf@kernel.org>
> ---
> drivers/fpga/fpga-mgr.c | 76 ++++++++++++++++++++++++++++++-----
> include/linux/fpga/fpga-mgr.h | 2 +
> 2 files changed, 68 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
> index f38bab01432e..774ac98fb69c 100644
> --- a/drivers/fpga/fpga-mgr.c
> +++ b/drivers/fpga/fpga-mgr.c
> @@ -21,6 +21,10 @@
> static DEFINE_IDA(fpga_mgr_ida);
> static struct class *fpga_mgr_class;
>
> +struct fpga_mgr_devres {
> + struct fpga_manager *mgr;
> +};
> +
> /**
> * fpga_image_info_alloc - Allocate a FPGA image info struct
> * @dev: owning device
> @@ -651,21 +655,21 @@ 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;
> + struct fpga_mgr_devres *dr;
>
> - ptr = devres_alloc(devm_fpga_mgr_release, sizeof(*ptr), GFP_KERNEL);
> - if (!ptr)
> + dr = devres_alloc(devm_fpga_mgr_release, sizeof(*dr), GFP_KERNEL);
> + if (!dr)
> return NULL;
>
> - mgr = fpga_mgr_create(dev, name, mops, priv);
> - if (!mgr) {
> - devres_free(ptr);
> - } else {
> - *ptr = mgr;
> - devres_add(dev, ptr);
> + dr->mgr = fpga_mgr_create(dev, name, mops, priv);
> + if (!dr->mgr) {
> + devres_free(dr);
> + return NULL;
> }
>
> - return mgr;
> + devres_add(dev, dr);
> +
> + return dr->mgr;
> }
> EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
>
> @@ -722,6 +726,58 @@ void fpga_mgr_unregister(struct fpga_manager *mgr)
> }
> EXPORT_SYMBOL_GPL(fpga_mgr_unregister);
>
> +static int fpga_mgr_devres_match(struct device *dev, void *priv,
> + void *match_data)
> +{
> + struct fpga_mgr_devres *dr = priv;
> +
> + return match_data == dr->mgr;
> +}
> +
> +static void devm_fpga_mgr_unregister(struct device *dev, void *priv)
> +{
> + struct fpga_mgr_devres *dr = priv;
> +
> + fpga_mgr_unregister(dr->mgr);
> +}
> +
> +/**
> + * devm_fpga_mgr_register - resource managed variant of fpga_mgr_register()
> + * @dev: managing device for this FPGA manager
> + * @mgr: fpga manager struct
> + *
> + * 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_mgr_devres *dr;
> + int err;
nit
int ret;
Fine if it isn't changed.
Reviewed-by: Tom Rix <trix@redhat.com>
> +
> + /* 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;
> +
> + dr = devres_alloc(devm_fpga_mgr_unregister, sizeof(*dr), GFP_KERNEL);
> + if (!dr)
> + return -ENOMEM;
> +
> + err = fpga_mgr_register(mgr);
> + if (err) {
> + devres_free(dr);
> + return err;
> + }
> +
> + dr->mgr = mgr;
> + devres_add(dev, dr);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(devm_fpga_mgr_register);
> +
> static void fpga_mgr_dev_release(struct device *dev)
> {
> }
> diff --git a/include/linux/fpga/fpga-mgr.h b/include/linux/fpga/fpga-mgr.h
> index e8ca62b2cb5b..2bc3030a69e5 100644
> --- a/include/linux/fpga/fpga-mgr.h
> +++ b/include/linux/fpga/fpga-mgr.h
> @@ -198,6 +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);
>
> +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);
next prev parent reply other threads:[~2020-10-04 18:08 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-04 5:14 [PATCH 00/10] Introduce devm_fpga_mgr_register() Moritz Fischer
2020-10-04 5:14 ` [PATCH 01/10] fpga: fpga-mgr: Add devm_fpga_mgr_register() API Moritz Fischer
2020-10-04 18:08 ` Tom Rix [this message]
2020-10-05 5:18 ` Wu, Hao
2020-10-05 16:45 ` Moritz Fischer
2020-10-04 5:14 ` [PATCH 02/10] fpga: fpga-mgr: altera-ps-spi: Simplify registration Moritz Fischer
2020-10-04 18:15 ` Tom Rix
2020-10-04 5:14 ` [PATCH 03/10] fpga: fpga-mgr: dfl-fme-mgr: " Moritz Fischer
2020-10-04 18:22 ` Tom Rix
2020-10-04 23:40 ` Moritz Fischer
2020-10-04 5:14 ` [PATCH 04/10] fpga: fpga-mgr: ice40-spi: " Moritz Fischer
2020-10-04 18:24 ` Tom Rix
2020-10-04 5:14 ` [PATCH 05/10] fpga: fpga-mgr: machxo2-spi: " Moritz Fischer
2020-10-04 18:25 ` Tom Rix
2020-10-04 5:14 ` [PATCH 06/10] fpga: fpga-mgr: socfpga: " Moritz Fischer
2020-10-04 18:27 ` Tom Rix
2020-10-04 5:14 ` [PATCH 07/10] fpga: fpga-mgr: ts73xx: " Moritz Fischer
2020-10-04 18:27 ` Tom Rix
2020-10-04 5:14 ` [PATCH 08/10] fpga: fpga-mgr: xilinx-spi: " Moritz Fischer
2020-10-04 18:28 ` Tom Rix
2020-10-04 5:14 ` [PATCH 09/10] fpga: fpga-mgr: zynqmp: " Moritz Fischer
2020-10-04 18:33 ` Tom Rix
2020-10-04 5:14 ` [PATCH 10/10] fpga: fpga-mgr: altera-pr-ip: " Moritz Fischer
2020-10-04 18:47 ` Tom Rix
2020-10-04 23:39 ` Moritz Fischer
2020-11-03 7:14 [PATCH 00/10] Introduce devm_fpga_mgr_register() API Moritz Fischer
2020-11-03 7:14 ` [PATCH 01/10] fpga: fpga-mgr: Add " Moritz Fischer
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