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From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: "Bjorn Helgaas" <bhelgaas@google.com>,
	"Mark Rutland" <mark.rutland@arm.com>,
	"Giovanni Cabiddu" <giovanni.cabiddu@intel.com>,
	"Rafał Miłecki" <zajec5@gmail.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	linux-pci@vger.kernel.org,
	"Alexander Duyck" <alexanderduyck@fb.com>,
	"Russell Currey" <ruscur@russell.cc>,
	"Sathya Prakash" <sathya.prakash@broadcom.com>,
	oss-drivers@corigine.com, "Oliver O'Halloran" <oohall@gmail.com>,
	"H. Peter Anvin" <hpa@zytor.com>, "Jiri Olsa" <jolsa@redhat.com>,
	linux-perf-users@vger.kernel.org,
	"Stefano Stabellini" <sstabellini@kernel.org>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	linux-scsi@vger.kernel.org,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Ido Schimmel" <idosch@nvidia.com>,
	x86@kernel.org, qat-linux@intel.com,
	"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
	"Ingo Molnar" <mingo@redhat.com>,
	"Geert Uytterhoeven" <geert@linux-m68k.org>,
	"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
	linux-wireless@vger.kernel.org,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Mathias Nyman" <mathias.nyman@intel.com>,
	"Yisen Zhuang" <yisen.zhuang@huawei.com>,
	"Fiona Trahe" <fiona.trahe@intel.com>,
	"Andrew Donnellan" <ajd@linux.ibm.com>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Suganath Prabu Subramani"
	<suganath-prabu.subramani@broadcom.com>,
	"Simon Horman" <simon.horman@corigine.com>,
	"Arnaldo Carvalho de Melo" <acme@kernel.org>,
	"Borislav Petkov" <bp@alien8.de>, "Michael Buesch" <m@bues.ch>,
	"Jiri Pirko" <jiri@nvidia.com>,
	"Namhyung Kim" <namhyung@kernel.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Andy Shevchenko" <andriy.shevchenko@intel.com>,
	"Juergen Gross" <jgross@suse.com>,
	"Salil Mehta" <salil.mehta@huawei.com>,
	"Sreekanth Reddy" <sreekanth.reddy@broadcom.com>,
	xen-devel@lists.xenproject.org,
	"Vadym Kochan" <vkochan@marvell.com>,
	MPT-FusionLinux.pdl@broadcom.com,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org,
	"Wojciech Ziemba" <wojciech.ziemba@intel.com>,
	linux-kernel@vger.kernel.org,
	"Taras Chornyi" <tchornyi@marvell.com>,
	"Zhou Wang" <wangzhou1@hisilicon.com>,
	linux-crypto@vger.kernel.org, kernel@pengutronix.de,
	netdev@vger.kernel.org, "Frederic Barrat" <fbarrat@linux.ibm.com>,
	"Paul Mackerras" <paulus@samba.org>,
	linuxppc-dev@lists.ozlabs.org,
	"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH v1 4/5] PCI: Adapt all code locations to not use struct pci_dev::driver directly
Date: Sat, 31 Jul 2021 14:08:36 +0200	[thread overview]
Message-ID: <20210731120836.vegno6voijvlflws@pengutronix.de> (raw)
In-Reply-To: <2b5e8cb5-fac2-5da2-f87b-d287d2c5ea81@oracle.com>

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Hello Boris,

On Fri, Jul 30, 2021 at 04:37:31PM -0400, Boris Ostrovsky wrote:
> On 7/29/21 4:37 PM, Uwe Kleine-König wrote:
> > --- a/drivers/pci/xen-pcifront.c
> > +++ b/drivers/pci/xen-pcifront.c
> > @@ -599,12 +599,12 @@ static pci_ers_result_t pcifront_common_process(int cmd,
> >  	result = PCI_ERS_RESULT_NONE;
> >  
> >  	pcidev = pci_get_domain_bus_and_slot(domain, bus, devfn);
> > -	if (!pcidev || !pcidev->driver) {
> > +	pdrv = pci_driver_of_dev(pcidev);
> > +	if (!pcidev || !pdrv) {
> 
> If pcidev is NULL we are dead by the time we reach 'if' statement.

Oh, you're right. So this needs something like:

	if (!pcidev || !(pdrv = pci_driver_of_dev(pcidev)))

or repeating the call to pci_driver_of_dev for each previous usage of
pdev->driver.

If there are no other preferences I'd got with the first approach for
v2.

Best regards and thanks for catching,
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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  reply	other threads:[~2021-07-31 12:10 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 20:37 [PATCH v1 0/5] PCI: Drop duplicated tracking of a pci_dev's bound driver Uwe Kleine-König
2021-07-29 20:37 ` [PATCH v1 4/5] PCI: Adapt all code locations to not use struct pci_dev::driver directly Uwe Kleine-König
2021-07-30 20:37   ` Boris Ostrovsky
2021-07-31 12:08     ` Uwe Kleine-König [this message]
2021-08-02 13:06       ` Boris Ostrovsky
2021-07-30  5:14 ` [PATCH v1 0/5] PCI: Drop duplicated tracking of a pci_dev's bound driver Greg Kroah-Hartman
2021-07-30  8:06 ` Andy Shevchenko
2021-07-30 17:48   ` Uwe Kleine-König

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