From: Takashi Iwai tiwai@suse.de
[ Upstream commit 776ac63a986d211286230c4fd70f85390eabedcd ]
r8152 driver sets up the MAC address at reset-resume, while rtl8152_set_mac_address() has the temporary autopm get/put. This may lead to a deadlock as the PM lock has been already taken for the execution of the runtime PM callback.
This patch adds the workaround to avoid the superfluous autpm when called from rtl8152_reset_resume().
Link: https://bugzilla.suse.com/show_bug.cgi?id=1186194 Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/usb/r8152.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-)
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 8dcc55e4a5bc..2cf763b4ea84 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -1550,7 +1550,8 @@ static int rtl8152_set_speed(struct r8152 *tp, u8 autoneg, u32 speed, u8 duplex, u32 advertising);
-static int rtl8152_set_mac_address(struct net_device *netdev, void *p) +static int __rtl8152_set_mac_address(struct net_device *netdev, void *p, + bool in_resume) { struct r8152 *tp = netdev_priv(netdev); struct sockaddr *addr = p; @@ -1559,9 +1560,11 @@ static int rtl8152_set_mac_address(struct net_device *netdev, void *p) if (!is_valid_ether_addr(addr->sa_data)) goto out1;
- ret = usb_autopm_get_interface(tp->intf); - if (ret < 0) - goto out1; + if (!in_resume) { + ret = usb_autopm_get_interface(tp->intf); + if (ret < 0) + goto out1; + }
mutex_lock(&tp->control);
@@ -1573,11 +1576,17 @@ static int rtl8152_set_mac_address(struct net_device *netdev, void *p)
mutex_unlock(&tp->control);
- usb_autopm_put_interface(tp->intf); + if (!in_resume) + usb_autopm_put_interface(tp->intf); out1: return ret; }
+static int rtl8152_set_mac_address(struct net_device *netdev, void *p) +{ + return __rtl8152_set_mac_address(netdev, p, false); +} + /* Devices containing proper chips can support a persistent * host system provided MAC address. * Examples of this are Dell TB15 and Dell WD15 docks @@ -1696,7 +1705,7 @@ static int determine_ethernet_addr(struct r8152 *tp, struct sockaddr *sa) return ret; }
-static int set_ethernet_addr(struct r8152 *tp) +static int set_ethernet_addr(struct r8152 *tp, bool in_resume) { struct net_device *dev = tp->netdev; struct sockaddr sa; @@ -1709,7 +1718,7 @@ static int set_ethernet_addr(struct r8152 *tp) if (tp->version == RTL_VER_01) ether_addr_copy(dev->dev_addr, sa.sa_data); else - ret = rtl8152_set_mac_address(dev, &sa); + ret = __rtl8152_set_mac_address(dev, &sa, in_resume);
return ret; } @@ -8442,7 +8451,7 @@ static int rtl8152_reset_resume(struct usb_interface *intf) clear_bit(SELECTIVE_SUSPEND, &tp->flags); tp->rtl_ops.init(tp); queue_delayed_work(system_long_wq, &tp->hw_phy_work, 0); - set_ethernet_addr(tp); + set_ethernet_addr(tp, true); return rtl8152_resume(intf); }
@@ -9562,7 +9571,7 @@ static int rtl8152_probe(struct usb_interface *intf, tp->rtl_fw.retry = true; #endif queue_delayed_work(system_long_wq, &tp->hw_phy_work, 0); - set_ethernet_addr(tp); + set_ethernet_addr(tp, false);
usb_set_intfdata(intf, tp);