From: "Saheed O. Bolarinwa" <refactormyself@gmail.com>
To: helgaas@kernel.org
Cc: "Saheed O. Bolarinwa" <refactormyself@gmail.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC PATCH v4 1/5] PCI: Handle NULL value inside pci_upstream_bridge()
Date: Sun, 7 Nov 2021 17:29:37 +0100 [thread overview]
Message-ID: <20211107162941.1196-2-refactormyself@gmail.com> (raw)
In-Reply-To: <20211107162941.1196-1-refactormyself@gmail.com>
Return NULL if a NULL pointer is passed into pci_upstream_bridge().
Signed-off-by: Saheed O. Bolarinwa <refactormyself@gmail.com>
---
include/linux/pci.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index cd8aa6fce204..b087e0b9814e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -695,6 +695,9 @@ static inline bool pci_is_bridge(struct pci_dev *dev)
static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
{
+ if (!dev)
+ return NULL;
+
dev = pci_physfn(dev);
if (pci_is_root_bus(dev->bus))
return NULL;
--
2.20.1
next prev parent reply other threads:[~2021-11-07 16:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-07 16:29 [RFC PATCH v4 0/5] Remove unncessary linked list from aspm.c Saheed O. Bolarinwa
2021-11-07 16:29 ` Saheed O. Bolarinwa [this message]
2021-11-07 16:29 ` [RFC PATCH v4 2/5] PCI/ASPM: Remove struct pcie_link_state.parent Saheed O. Bolarinwa
2021-11-07 16:29 ` [RFC PATCH v4 3/5] PCI/ASPM: Remove struct pcie_link_state.root Saheed O. Bolarinwa
2021-11-07 16:29 ` [RFC PATCH v4 4/5] PCI/ASPM: Remove struct pcie_link_state.downstream Saheed O. Bolarinwa
2021-11-07 16:29 ` [RFC PATCH v4 5/5] PCI/ASPM: Remove unncessary linked list from aspm.c Saheed O. Bolarinwa
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211107162941.1196-2-refactormyself@gmail.com \
--to=refactormyself@gmail.com \
--cc=helgaas@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.