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From: Todd Poynor <toddpoynor@gmail.com>
To: Rob Springer <rspringer@google.com>,
	John Joseph <jnjoseph@google.com>,
	Ben Chan <benchan@chromium.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
	Todd Poynor <toddpoynor@google.com>
Subject: [PATCH 11/16] staging: gasket: core: factor out generic device add code from PCI code
Date: Thu,  9 Aug 2018 20:21:06 -0700
Message-ID: <20180810032111.197743-12-toddpoynor@gmail.com> (raw)
In-Reply-To: <20180810032111.197743-1-toddpoynor@gmail.com>

From: Todd Poynor <toddpoynor@google.com>

Split out generic gasket device add code from the code for adding a PCI
gasket device, in prep for other gasket device types in the future.

Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
 drivers/staging/gasket/gasket_core.c | 76 ++++++++++++++++++----------
 1 file changed, 48 insertions(+), 28 deletions(-)

diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index aee819f379e9a..ce8ae226f82d9 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -1419,6 +1419,48 @@ int gasket_enable_device(struct gasket_dev *gasket_dev)
 }
 EXPORT_SYMBOL(gasket_enable_device);
 
+static int __gasket_add_device(struct device *parent_dev,
+			       struct gasket_internal_desc *internal_desc,
+			       struct gasket_dev **gasket_devp)
+{
+	int ret;
+	struct gasket_dev *gasket_dev;
+	const struct gasket_driver_desc *driver_desc =
+	    internal_desc->driver_desc;
+
+	ret = gasket_alloc_dev(internal_desc, parent_dev, &gasket_dev);
+	if (ret)
+		return ret;
+	if (IS_ERR(gasket_dev->dev_info.device)) {
+		dev_err(parent_dev, "Cannot create %s device %s [ret = %ld]\n",
+			driver_desc->name, gasket_dev->dev_info.name,
+			PTR_ERR(gasket_dev->dev_info.device));
+		ret = -ENODEV;
+		goto free_gasket_dev;
+	}
+
+	ret = gasket_sysfs_create_mapping(gasket_dev->dev_info.device,
+					  gasket_dev);
+	if (ret)
+		goto remove_device;
+
+	ret = gasket_sysfs_create_entries(gasket_dev->dev_info.device,
+					  gasket_sysfs_generic_attrs);
+	if (ret)
+		goto remove_sysfs_mapping;
+
+	*gasket_devp = gasket_dev;
+	return 0;
+
+remove_sysfs_mapping:
+	gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
+remove_device:
+	device_destroy(internal_desc->class, gasket_dev->dev_info.devt);
+free_gasket_dev:
+	gasket_free_dev(gasket_dev);
+	return ret;
+}
+
 /*
  * Add PCI gasket device.
  *
@@ -1433,7 +1475,6 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
 	int ret;
 	struct gasket_internal_desc *internal_desc;
 	struct gasket_dev *gasket_dev;
-	const struct gasket_driver_desc *driver_desc;
 	struct device *parent;
 
 	dev_dbg(&pci_dev->dev, "add PCI gasket device\n");
@@ -1447,29 +1488,15 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
 		return -ENODEV;
 	}
 
-	driver_desc = internal_desc->driver_desc;
-
 	parent = &pci_dev->dev;
-	ret = gasket_alloc_dev(internal_desc, parent, &gasket_dev);
+	ret = __gasket_add_device(parent, internal_desc, &gasket_dev);
 	if (ret)
 		return ret;
-	gasket_dev->pci_dev = pci_dev;
-	if (IS_ERR_OR_NULL(gasket_dev->dev_info.device)) {
-		pr_err("Cannot create %s device %s [ret = %ld]\n",
-		       driver_desc->name, gasket_dev->dev_info.name,
-		       PTR_ERR(gasket_dev->dev_info.device));
-		ret = -ENODEV;
-		goto fail1;
-	}
 
+	gasket_dev->pci_dev = pci_dev;
 	ret = gasket_setup_pci(pci_dev, gasket_dev);
 	if (ret)
-		goto fail2;
-
-	ret = gasket_sysfs_create_mapping(gasket_dev->dev_info.device,
-					  gasket_dev);
-	if (ret)
-		goto fail3;
+		goto cleanup_pci;
 
 	/*
 	 * Once we've created the mapping structures successfully, attempt to
@@ -1480,23 +1507,16 @@ int gasket_pci_add_device(struct pci_dev *pci_dev,
 	if (ret) {
 		dev_err(gasket_dev->dev,
 			"Cannot create sysfs pci link: %d\n", ret);
-		goto fail3;
+		goto cleanup_pci;
 	}
-	ret = gasket_sysfs_create_entries(gasket_dev->dev_info.device,
-					  gasket_sysfs_generic_attrs);
-	if (ret)
-		goto fail4;
 
 	*gasket_devp = gasket_dev;
 	return 0;
 
-fail4:
-fail3:
-	gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
-fail2:
+cleanup_pci:
 	gasket_cleanup_pci(gasket_dev);
+	gasket_sysfs_remove_mapping(gasket_dev->dev_info.device);
 	device_destroy(internal_desc->class, gasket_dev->dev_info.devt);
-fail1:
 	gasket_free_dev(gasket_dev);
 	return ret;
 }
-- 
2.18.0.597.ga71716f1ad-goog


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-10  3:20 [PATCH 00/16] staging: gasket: return of the son of cleanups Todd Poynor
2018-08-10  3:20 ` [PATCH 01/16] MAINTAINERS: Switch a maintainer for drivers/staging/gasket Todd Poynor
2018-08-10  3:40   ` John Joseph
2018-08-10  6:14     ` Greg Kroah-Hartman
2018-08-10 10:28       ` Todd Poynor
2018-08-10  3:20 ` [PATCH 02/16] staging: gasket: core: remove debug log that could crash Todd Poynor
     [not found]   ` <CALTjKEM2q=pGh+nz6O7mQerkcnZ+=B6t+viu7dwfMHjZMQRXGg@mail.gmail.com>
2018-08-10 16:57     ` Rob Springer
2018-08-10  3:20 ` [PATCH 03/16] staging: gasket: core: fix line continuation indent in gasket_alloc_dev Todd Poynor
2018-08-10  3:20 ` [PATCH 04/16] staging: gasket: core: remove kobj_name param from gasket_alloc_dev Todd Poynor
2018-08-10  3:21 ` [PATCH 05/16] staging: gasket: core: remove ftrace-style debug logs Todd Poynor
2018-08-10  3:21 ` [PATCH 06/16] staging: gasket: remove gasket_exit() Todd Poynor
2018-08-10  3:21 ` [PATCH 07/16] staging: gasket: page table: remove unnecessary NULL check Todd Poynor
2018-08-10  3:21 ` [PATCH 08/16] staging: gasket: page table: use dma_mapping_error for error detection Todd Poynor
2018-08-10  3:21 ` [PATCH 09/16] staging: gasket: core: switch to relaxed memory-mapped I/O Todd Poynor
2018-08-10  3:21 ` [PATCH 10/16] staging: gasket: page table: remove extraneous memory barriers Todd Poynor
2018-08-10  3:21 ` Todd Poynor [this message]
2018-08-10  3:21 ` [PATCH 12/16] staging: gasket: core: factor out generic device remove code from PCI Todd Poynor
2018-08-10  3:21 ` [PATCH 13/16] staging: gasket: core: rename lookup_internal_desc to be PCI-specific Todd Poynor
2018-08-10  3:21 ` [PATCH 14/16] staging: gasket: interrupt: refactor PCI MSIX-specific handler code Todd Poynor
2018-08-10  3:21 ` [PATCH 15/16] staging: gasket: interrupt: simplify interrupt init parameters Todd Poynor
2018-08-10  3:21 ` [PATCH 16/16] staging: gasket: interrupt: remove unimplemented interrupt types Todd Poynor
2018-08-13  6:51 ` [PATCH 00/16] staging: gasket: return of the son of cleanups Christoph Hellwig

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