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0452800f6d
linux/drivers/net/dsa
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Chuanhong Guo 0452800f6d net: dsa: mt7530: fix null pointer dereferencing in port5 setup 
The 2nd gmac of mediatek soc ethernet may not be connected to a PHY
and a phy-handle isn't always available.
Unfortunately, mt7530 dsa driver assumes that the 2nd gmac is always
connected to switch port 5 and setup mt7530 according to phy address
of 2nd gmac node, causing null pointer dereferencing when phy-handle
isn't defined in dts.
This commit fix this setup code by checking return value of
of_parse_phandle before using it.

Fixes: 38f790a805 ("net: dsa: mt7530: Add support for port 5")
Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: René van Dorst <opensource@vdorst.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-03 16:10:32 -07:00
..
b53 net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge 2020-03-30 19:55:42 -07:00
microchip net: dsa: ksz: Select KSZ protocol tag 2020-03-31 10:04:40 -07:00
mv88e6xxx net: dsa: mv88e6xxx: use PHY_DETECT in mac_link_up/mac_link_down 2020-03-15 17:11:12 -07:00
ocelot net: dsa: felix: add port policers 2020-03-30 11:44:00 -07:00
qca net: dsa: propagate resolved link config via mac_link_up() 2020-02-27 12:02:14 -08:00
sja1105 net: dsa: sja1105: add broadcast and per-traffic class policers 2020-03-30 11:44:01 -07:00
bcm_sf2_cfp.c net: dsa: bcm_sf2: Support specifying VLAN tag egress rule 2020-03-30 19:55:42 -07:00
bcm_sf2_regs.h Revert "net: dsa: bcm_sf2: Also configure Port 5 for 2Gb/sec on 7278" 2020-02-26 16:33:35 -08:00
bcm_sf2.c net: dsa: bcm_sf2: Disable learning for ASP port 2020-03-30 19:55:42 -07:00
bcm_sf2.h net: dsa: bcm_sf2: Add support for optional reset controller line 2019-11-05 18:06:38 -08:00
dsa_loop_bdinfo.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
dsa_loop.c net: dsa: Get information about stacked DSA protocol 2020-01-08 16:01:13 -08:00
dsa_loop.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig net: dsa: vsc73xx: Remove dependency on CONFIG_OF 2020-01-05 14:23:48 -08:00
lan9303_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
lan9303_mdio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
lan9303-core.c net: dsa: Get information about stacked DSA protocol 2020-01-08 16:01:13 -08:00
lan9303.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-11-04 09:26:51 +09:00
lantiq_gswip.c net: dsa: propagate resolved link config via mac_link_up() 2020-02-27 12:02:14 -08:00
lantiq_pce.h net: dsa: Use the correct style for SPDX License Identifier 2019-09-22 15:25:08 -07:00
Makefile net: dsa: add support for Atheros AR9331 built-in switch 2019-12-20 17:05:47 -08:00
mt7530.c net: dsa: mt7530: fix null pointer dereferencing in port5 setup 2020-04-03 16:10:32 -07:00
mt7530.h net: dsa: mt7530: use resolved link config in mac_link_up() 2020-03-29 22:05:53 -07:00
mv88e6060.c net: dsa: Get information about stacked DSA protocol 2020-01-08 16:01:13 -08:00
mv88e6060.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
qca8k.c net: dsa: Get information about stacked DSA protocol 2020-01-08 16:01:13 -08:00
qca8k.h net: dsa: qca8k: introduce reset via gpio feature 2019-06-27 11:17:30 -07:00
realtek-smi-core.c net: dsa: remove dsa_switch_alloc helper 2019-10-22 12:37:07 -07:00
realtek-smi-core.h net: dsa: fix warning same module names 2019-06-14 19:28:54 -07:00
rtl8366.c net: dsa: rtl8366: Check VLAN ID and not ports 2019-10-02 12:09:23 -04:00
rtl8366rb.c net: dsa: Get information about stacked DSA protocol 2020-01-08 16:01:13 -08:00
vitesse-vsc73xx-core.c net: dsa: vsc73xx: make the MTU configurable 2020-03-27 16:07:25 -07:00
vitesse-vsc73xx-platform.c net: dsa: vsc73xx: add support for parallel mode 2019-07-07 14:16:32 -07:00
vitesse-vsc73xx-spi.c net: dsa: vsc73xx: Split vsc73xx driver 2019-07-07 14:16:32 -07:00
vitesse-vsc73xx.h net: dsa: vsc73xx: Split vsc73xx driver 2019-07-07 14:16:32 -07:00