linux-kernel - [PATCH 01/13] staging: gasket: core: hold reference to pci

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Message-Id: <20180729193646.201721-2-toddpoynor@gmail.com>
Date:   Sun, 29 Jul 2018 12:36:34 -0700
From:   Todd Poynor <toddpoynor@...il.com>
To:     Rob Springer <rspringer@...gle.com>,
        John Joseph <jnjoseph@...gle.com>,
        Ben Chan <benchan@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        Dmitry Torokhov <dtor@...omium.org>,
        Todd Poynor <toddpoynor@...gle.com>
Subject: [PATCH 01/13] staging: gasket: core: hold reference to pci_dev while used

From: Todd Poynor <toddpoynor@...gle.com>

Hold a reference on the struct pci_dev while a pointer to it is held in
the gasket data structures.

Signed-off-by: Todd Poynor <toddpoynor@...gle.com>
---
 drivers/staging/gasket/gasket_core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/gasket/gasket_core.c b/drivers/staging/gasket/gasket_core.c
index 2b484d067c38a..b832a4f529f27 100644
--- a/drivers/staging/gasket/gasket_core.c
+++ b/drivers/staging/gasket/gasket_core.c
@@ -488,6 +488,7 @@ static void gasket_free_dev(struct gasket_dev *gasket_dev)
 	internal_desc->devs[gasket_dev->dev_idx] = NULL;
 	mutex_unlock(&internal_desc->mutex);
 	put_device(gasket_dev->dev);
+	pci_dev_put(gasket_dev->pci_dev);
 	kfree(gasket_dev);
 }
 
@@ -565,6 +566,7 @@ static int gasket_pci_probe(
 	ret = gasket_alloc_dev(internal_desc, parent, &gasket_dev, kobj_name);
 	if (ret)
 		return ret;
+	gasket_dev->pci_dev = pci_dev_get(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,
@@ -572,7 +574,6 @@ static int gasket_pci_probe(
 		ret = -ENODEV;
 		goto fail1;
 	}
-	gasket_dev->pci_dev = pci_dev;
 
 	ret = gasket_setup_pci(pci_dev, gasket_dev);
 	if (ret)
@@ -703,7 +704,6 @@ static int gasket_setup_pci(
 {
 	int i, mapped_bars, ret;
 
-	gasket_dev->pci_dev = pci_dev;
 	ret = pci_enable_device(pci_dev);
 	if (ret) {
 		dev_err(gasket_dev->dev, "cannot enable PCI device\n");
-- 
2.18.0.345.g5c9ce644c3-goog