linux-kernel - [PATCH v2 4/6] PCI: Provide wrapper to access a pci

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Message-Id: <20210803100150.1543597-5-u.kleine-koenig@pengutronix.de>
Date:   Tue,  3 Aug 2021 12:01:48 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     kernel@...gutronix.de,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-pci@...r.kernel.org, Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Russell Currey <ruscur@...sell.cc>,
        "Oliver O'Halloran" <oohall@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Rafał Miłecki <zajec5@...il.com>,
        Zhou Wang <wangzhou1@...ilicon.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Giovanni Cabiddu <giovanni.cabiddu@...el.com>,
        Sathya Prakash <sathya.prakash@...adcom.com>,
        Sreekanth Reddy <sreekanth.reddy@...adcom.com>,
        Suganath Prabu Subramani 
        <suganath-prabu.subramani@...adcom.com>,
        Frederic Barrat <fbarrat@...ux.ibm.com>,
        Andrew Donnellan <ajd@...ux.ibm.com>,
        Arnd Bergmann <arnd@...db.de>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Vadym Kochan <vkochan@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Jiri Pirko <jiri@...dia.com>, Ido Schimmel <idosch@...dia.com>,
        Simon Horman <simon.horman@...igine.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Michael Buesch <m@...s.ch>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Fiona Trahe <fiona.trahe@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>,
        Wojciech Ziemba <wojciech.ziemba@...el.com>,
        Alexander Duyck <alexanderduyck@...com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-crypto@...r.kernel.org, qat-linux@...el.com,
        MPT-FusionLinux.pdl@...adcom.com, linux-scsi@...r.kernel.org,
        netdev@...r.kernel.org, oss-drivers@...igine.com,
        xen-devel@...ts.xenproject.org, linux-usb@...r.kernel.org
Subject: [PATCH v2 4/6] PCI: Provide wrapper to access a pci_dev's bound driver

Which driver a device is bound to is available twice: In struct
pci_dev::dev->driver and in struct pci_dev::driver. To get rid of the
duplication introduce a wrapper to access struct pci_dev's driver
member. Once all users are converted the wrapper can be changed to
calculate the driver using pci_dev::dev->driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 include/linux/pci.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 540b377ca8f6..778f3b5e6f23 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -887,6 +887,7 @@ struct pci_driver {
 };
 
 #define	to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
+#define pci_driver_of_dev(pdev) ((pdev)->driver)
 
 /**
  * PCI_DEVICE - macro used to describe a specific PCI device
-- 
2.30.2