linux-kernel - [PATCH v1] PCI: Use PCI_STD_NUM_BARS when checking standard BARs

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Message-Id: <20220121183330.1141702-1-helgaas@kernel.org>
Date:   Fri, 21 Jan 2022 12:33:30 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Denis Efremov <efremov@...ux.com>
Subject: [PATCH v1] PCI: Use PCI_STD_NUM_BARS when checking standard BARs

From: Bjorn Helgaas <bhelgaas@...gle.com>

usb_hcd_pci_probe() searches for an I/O BAR using a combination of
PCI_STD_NUM_BARS (to control loop iteration) and PCI_ROM_RESOURCE (to check
whether the loop exits without finding anything).

Use PCI_STD_NUM_BARS consistently.

No functional change since PCI_STD_NUM_BARS == PCI_ROM_RESOURCE, but this
removes a dependency on that relationship and makes the code read better.

Fixes: c9c13ba428ef ("PCI: Add PCI_STD_NUM_BARS for the number of standard
BARs")
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Denis Efremov <efremov@...ux.com>
---
 drivers/usb/core/hcd-pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index d630cccd2e6e..784466117c92 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -248,7 +248,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id,
 					hcd->rsrc_len, driver->description))
 				break;
 		}
-		if (region == PCI_ROM_RESOURCE) {
+		if (region == PCI_STD_NUM_BARS) {
 			dev_dbg(&dev->dev, "no i/o regions available\n");
 			retval = -EBUSY;
 			goto put_hcd;
-- 
2.25.1