linux-kernel - [PATCH v1 1/2] efi/fb: Correct PCI_STD_RESOURCE

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Message-ID: <20170519195849.25440.65477.stgit@bhelgaas-glaptop.roam.corp.google.com>
Date:   Fri, 19 May 2017 14:58:49 -0500
From:   Bjorn Helgaas <bhelgaas@...gle.com>
To:     linux-pci@...r.kernel.org
Cc:     Douglas Lehr <dllehr@...ibm.com>,
        Milton Miller <miltonm@...ibm.com>,
        Anton Blanchard <anton@...ba.org>,
        linux-kernel@...r.kernel.org,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Subject: [PATCH v1 1/2] efi/fb: Correct PCI_STD_RESOURCE_END usage

PCI_STD_RESOURCE_END is (confusingly) the index of the last valid BAR, not
the *number* of BARs.  To iterate through all possible BARs, we need to
include PCI_STD_RESOURCE_END.

Fixes: 55d728a40d36 ("efi/fb: Avoid reconfiguration of BAR that covers the framebuffer")
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
 drivers/video/fbdev/efifb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
index b827a8113e26..ff01bed7112f 100644
--- a/drivers/video/fbdev/efifb.c
+++ b/drivers/video/fbdev/efifb.c
@@ -408,7 +408,7 @@ static void efifb_fixup_resources(struct pci_dev *dev)
 	if (!base)
 		return;
 
-	for (i = 0; i < PCI_STD_RESOURCE_END; i++) {
+	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
 		struct resource *res = &dev->resource[i];
 
 		if (!(res->flags & IORESOURCE_MEM))