From: Oliver Neukum <oneukum@suse.com>
Date: Mon, 25 Oct 2021 16:11:21 +0200
Subject: usbb: catc: use correct API for MAC addresses
Patch-mainline: v5.16-rc1
Git-commit: 7ce9a701ac8f44798e46dede02b924504dc65a5c
References: jsc#PED-1565
Commit 406f42fa0d3c ("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it got through appropriate helpers.
In the case of catc we need a new temporary buffer to conform
to the rules for DMA coherency. That in turn necessitates
a reworking of error handling in probe().
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/usb/catc.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
--- a/drivers/net/usb/catc.c
+++ b/drivers/net/usb/catc.c
@@ -770,17 +770,23 @@ static int catc_probe(struct usb_interfa
struct net_device *netdev;
struct catc *catc;
u8 broadcast[ETH_ALEN];
- int pktsz, ret;
+ u8 *macbuf;
+ int pktsz, ret = -ENOMEM;
+
+ macbuf = kmalloc(ETH_ALEN, GFP_KERNEL);
+ if (!macbuf)
+ goto error;
if (usb_set_interface(usbdev,
intf->altsetting->desc.bInterfaceNumber, 1)) {
dev_err(dev, "Can't set altsetting 1.\n");
- return -EIO;
+ ret = -EIO;
+ goto fail_mem;;
}
netdev = alloc_etherdev(sizeof(struct catc));
if (!netdev)
- return -ENOMEM;
+ goto fail_mem;
catc = netdev_priv(netdev);
@@ -870,7 +876,8 @@ static int catc_probe(struct usb_interfa
dev_dbg(dev, "Getting MAC from SEEROM.\n");
- catc_get_mac(catc, netdev->dev_addr);
+ catc_get_mac(catc, macbuf);
+ eth_hw_addr_set(netdev, macbuf);
dev_dbg(dev, "Setting MAC into registers.\n");
@@ -899,7 +906,8 @@ static int catc_probe(struct usb_interfa
} else {
dev_dbg(dev, "Performing reset\n");
catc_reset(catc);
- catc_get_mac(catc, netdev->dev_addr);
+ catc_get_mac(catc, macbuf);
+ eth_hw_addr_set(netdev, macbuf);
dev_dbg(dev, "Setting RX Mode\n");
catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
@@ -917,6 +925,7 @@ static int catc_probe(struct usb_interfa
if (ret)
goto fail_clear_intfdata;
+ kfree(macbuf);
return 0;
fail_clear_intfdata:
@@ -927,6 +936,9 @@ fail_free:
usb_free_urb(catc->rx_urb);
usb_free_urb(catc->irq_urb);
free_netdev(netdev);
+fail_mem:
+ kfree(macbuf);
+error:
return ret;
}