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From: Jan Beulich <jbeulich@suse.com>
To: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>
Cc: Juergen Gross <jgross@suse.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Konrad Wilk <konrad.wilk@oracle.com>
Subject: [PATCH 3/3] xen-pciback: simplify vpci's find hook
Date: Wed, 7 Apr 2021 16:37:58 +0200	[thread overview]
Message-ID: <158273a2-d1b9-3545-b25d-affca867376c@suse.com> (raw)
In-Reply-To: <d2ac85d9-0ad1-71a3-fa3b-b99340b3204d@suse.com>

There's no point in comparing SBDF - we can simply compare the struct
pci_dev pointers. If they weren't the same for a given device, we'd have
bigger problems from having stored a stale pointer.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/drivers/xen/xen-pciback/vpci.c
+++ b/drivers/xen/xen-pciback/vpci.c
@@ -235,7 +235,6 @@ static int __xen_pcibk_get_pcifront_dev(
 					unsigned int *devfn)
 {
 	struct pci_dev_entry *entry;
-	struct pci_dev *dev = NULL;
 	struct vpci_dev_data *vpci_dev = pdev->pci_dev_data;
 	int found = 0, slot;
 
@@ -244,11 +243,7 @@ static int __xen_pcibk_get_pcifront_dev(
 		list_for_each_entry(entry,
 			    &vpci_dev->dev_list[slot],
 			    list) {
-			dev = entry->dev;
-			if (dev && dev->bus->number == pcidev->bus->number
-				&& pci_domain_nr(dev->bus) ==
-					pci_domain_nr(pcidev->bus)
-				&& dev->devfn == pcidev->devfn) {
+			if (entry->dev == pcidev) {
 				found = 1;
 				*domain = 0;
 				*bus = 0;



  parent reply	other threads:[~2021-04-07 14:38 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-07 14:35 [PATCH 0/3] xen-pciback: a fix, a workaround, and some simplification Jan Beulich
2021-04-07 14:37 ` [PATCH 1/3] xen-pciback: redo VF placement in the virtual topology Jan Beulich
2021-04-08 22:28   ` Boris Ostrovsky
2021-04-09  8:16     ` Jan Beulich
2021-04-07 14:37 ` [PATCH 2/3] xen-pciback: reconfigure also from backend watch handler Jan Beulich
2021-04-09 21:43   ` Boris Ostrovsky
2021-04-12  9:44     ` Jan Beulich
2021-04-12 15:55       ` Boris Ostrovsky
2021-04-07 14:37 ` Jan Beulich [this message]
2021-04-09 21:45   ` [PATCH 3/3] xen-pciback: simplify vpci's find hook Boris Ostrovsky
2021-04-12  9:50     ` Jan Beulich
2021-04-12 16:05       ` Boris Ostrovsky
2021-04-13  8:09         ` Jan Beulich
2021-04-13 12:54           ` Boris Ostrovsky
2021-04-23  8:05   ` Juergen Gross

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