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-rw-r--r--Documentation/driver-api/fpga/fpga-mgr.rst13
-rw-r--r--drivers/fpga/altera-cvp.c8
-rw-r--r--drivers/fpga/altera-pr-ip-core.c9
-rw-r--r--drivers/fpga/altera-ps-spi.c11
-rw-r--r--drivers/fpga/dfl-fme-mgr.c11
-rw-r--r--drivers/fpga/fpga-mgr.c64
-rw-r--r--drivers/fpga/ice40-spi.c10
-rw-r--r--drivers/fpga/machxo2-spi.c11
-rw-r--r--drivers/fpga/socfpga-a10.c5
-rw-r--r--drivers/fpga/socfpga.c10
-rw-r--r--drivers/fpga/ts73xx-fpga.c11
-rw-r--r--drivers/fpga/xilinx-spi.c12
-rw-r--r--drivers/fpga/zynq-fpga.c5
-rw-r--r--include/linux/fpga/fpga-mgr.h4
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 82b6dbbd31cd..db8885efbc22 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 7fa793672a7a..610a1558e0ed 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 65e0b6a2c031..a7a3bf0b5202 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 24b25c626036..33aafda50af5 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 9f045d058cfd..76f37709dd1a 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 a41b07e37884..c3866816456a 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 @@ error_kfree:
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 @@ error_device:
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 5981c7ee7a7d..6154661b8f76 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 a582e0000c97..4d8a87641587 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 be30c48eb6e4..573d88bdf730 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 959d71f26896..4a8a2fcd4e6c 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 08efd1895b1b..dc22a5842609 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 8d1945966533..469486be20c4 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 3110e00121ca..bb82efeebb9d 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 8ab5df769923..e8ca62b2cb5b 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 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 19:20:43 +0100