netdev - [PATCH net 2/3] net: dsa: felix: fix internal MDIO controller resource length

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Message-Id: <20230224155235.512695-3-vladimir.oltean@nxp.com>
Date:   Fri, 24 Feb 2023 17:52:34 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Colin Foster <colin.foster@...advantage.com>,
        Lee Jones <lee@...nel.org>,
        Maksim Kiselev <bigunclemax@...il.com>,
        Maxim Kochetkov <fido_max@...ox.ru>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>
Subject: [PATCH net 2/3] net: dsa: felix: fix internal MDIO controller resource length

The blamed commit did not properly convert the resource start/end format
into the DEFINE_RES_MEM_NAMED() start/length format, resulting in a
resource for vsc9959_imdio_res which is much longer than expected:

$ cat /proc/iomem
1f8000000-1f815ffff : pcie@...000000
  1f8140000-1f815ffff : 0000:00:00.5
    1f8148030-1f815006f : imdio

vs (correct)

$ cat /proc/iomem
1f8000000-1f815ffff : pcie@...000000
  1f8140000-1f815ffff : 0000:00:00.5
    1f8148030-1f814803f : imdio

Luckily it's not big enough to exceed the size of the parent resource
(pci_resource_end(pdev, VSC9959_IMDIO_PCI_BAR)), and it doesn't overlap
with anything else that the Linux driver uses currently, so the larger
than expected size isn't a practical problem that I can see. Although it
is clearly wrong in the /proc/iomem output.

Fixes: 044d447a801f ("net: dsa: felix: use DEFINE_RES_MEM_NAMED for resources")
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/dsa/ocelot/felix_vsc9959.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index 354aa3dbfde7..dddb28984bdf 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -554,7 +554,7 @@ static const char * const vsc9959_resource_names[TARGET_MAX] = {
  * SGMII/QSGMII MAC PCS can be found.
  */
 static const struct resource vsc9959_imdio_res =
-	DEFINE_RES_MEM_NAMED(0x8030, 0x8040, "imdio");
+	DEFINE_RES_MEM_NAMED(0x8030, 0x10, "imdio");
 
 static const struct reg_field vsc9959_regfields[REGFIELD_MAX] = {
 	[ANA_ADVLEARN_VLAN_CHK] = REG_FIELD(ANA_ADVLEARN, 6, 6),
-- 
2.34.1