From 67122a7910bf2135dc7f7ececfcf16a5bdb362c1 Mon Sep 17 00:00:00 2001 From: Michal Vokáč Date: Wed, 3 Jun 2020 13:31:39 +0200 Subject: net: dsa: qca8k: Fix "Unexpected gfp" kernel exception MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 7e99e3470172 ("net: dsa: remove dsa_switch_alloc helper") replaced the dsa_switch_alloc helper by devm_kzalloc in all DSA drivers. Unfortunately it introduced a typo in qca8k.c driver and wrong argument is passed to the devm_kzalloc function. This fix mitigates the following kernel exception: Unexpected gfp: 0x6 (__GFP_HIGHMEM|GFP_DMA32). Fixing up to gfp: 0x101 (GFP_DMA|__GFP_ZERO). Fix your code! CPU: 1 PID: 44 Comm: kworker/1:1 Not tainted 5.5.9-yocto-ua #1 Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) Workqueue: events deferred_probe_work_func [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (dump_stack+0x90/0xa4) [] (dump_stack) from [] (new_slab+0x20c/0x214) [] (new_slab) from [] (___slab_alloc.constprop.0+0x1b8/0x540) [] (___slab_alloc.constprop.0) from [] (__slab_alloc.constprop.0+0x1c/0x24) [] (__slab_alloc.constprop.0) from [] (__kmalloc_track_caller+0x1b0/0x298) [] (__kmalloc_track_caller) from [] (devm_kmalloc+0x24/0x70) [] (devm_kmalloc) from [] (qca8k_sw_probe+0x94/0x1ac) [] (qca8k_sw_probe) from [] (mdio_probe+0x30/0x54) [] (mdio_probe) from [] (really_probe+0x1e0/0x348) [] (really_probe) from [] (driver_probe_device+0x60/0x16c) [] (driver_probe_device) from [] (bus_for_each_drv+0x70/0x94) [] (bus_for_each_drv) from [] (__device_attach+0xb4/0x11c) [] (__device_attach) from [] (bus_probe_device+0x84/0x8c) [] (bus_probe_device) from [] (deferred_probe_work_func+0x64/0x90) [] (deferred_probe_work_func) from [] (process_one_work+0x1d4/0x41c) [] (process_one_work) from [] (worker_thread+0x248/0x528) [] (worker_thread) from [] (kthread+0x124/0x150) [] (kthread) from [] (ret_from_fork+0x14/0x3c) Exception stack(0xee1b5fb0 to 0xee1b5ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 qca8k 2188000.ethernet-1:0a: Using legacy PHYLIB callbacks. Please migrate to PHYLINK! qca8k 2188000.ethernet-1:0a eth2 (uninitialized): PHY [2188000.ethernet-1:01] driver [Generic PHY] qca8k 2188000.ethernet-1:0a eth1 (uninitialized): PHY [2188000.ethernet-1:02] driver [Generic PHY] Fixes: 7e99e3470172 ("net: dsa: remove dsa_switch_alloc helper") Signed-off-by: Michal Vokáč Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- drivers/net/dsa/qca8k.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/net/dsa') diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 9f4205b4439b..d2b5ab403e06 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -1079,8 +1079,7 @@ qca8k_sw_probe(struct mdio_device *mdiodev) if (id != QCA8K_ID_QCA8337) return -ENODEV; - priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), - QCA8K_NUM_PORTS); + priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL); if (!priv->ds) return -ENOMEM; -- cgit From 4d3da2d8d91f66988a829a18a0ce59945e8ae4fb Mon Sep 17 00:00:00 2001 From: Martin Blumenstingl Date: Sun, 7 Jun 2020 15:02:58 +0200 Subject: net: dsa: lantiq_gswip: fix and improve the unsupported interface error While trying to use the lantiq_gswip driver on one of my boards I made a mistake when specifying the phy-mode (because the out-of-tree driver wants phy-mode "gmii" or "mii" for the internal PHYs). In this case the following error is printed multiple times: Unsupported interface: 3 While it gives at least a hint at what may be wrong it is not very user friendly. Print the human readable phy-mode and also which port is configured incorrectly (this hardware supports ports 0..6) to improve the cases where someone made a mistake. Fixes: 14fceff4771e51 ("net: dsa: Add Lantiq / Intel DSA driver for vrx200") Signed-off-by: Martin Blumenstingl Acked-by: Hauke Mehrtens Signed-off-by: David S. Miller --- drivers/net/dsa/lantiq_gswip.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/net/dsa') diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c index cf6fa8fede33..521ebc072903 100644 --- a/drivers/net/dsa/lantiq_gswip.c +++ b/drivers/net/dsa/lantiq_gswip.c @@ -1452,7 +1452,8 @@ static void gswip_phylink_validate(struct dsa_switch *ds, int port, unsupported: bitmap_zero(supported, __ETHTOOL_LINK_MODE_MASK_NBITS); - dev_err(ds->dev, "Unsupported interface: %d\n", state->interface); + dev_err(ds->dev, "Unsupported interface '%s' for port %d\n", + phy_modes(state->interface), port); return; } -- cgit