kernel/linux.git/drivers/net/dsa/microchip, branch v5.10.257

net: dsa: microchip: fix build warning

2024-10-17T13:08:39+00:00

In commit 65a9383389db ("net: dsa: microchip: fix initial port flush problem"), the build warning of an unused variable showed up. Fix this by removing the variable entirely. Fixes: 65a9383389db ("net: dsa: microchip: fix initial port flush problem") Signed-off-by: Greg Kroah-Hartman

net: dsa: microchip: fix initial port flush problem

2024-07-05T07:12:48+00:00

[ Upstream commit ad53f5f54f351e967128edbc431f0f26427172cf ] The very first flush in any port will flush all learned addresses in all ports. This can be observed by unplugging the cable from one port while additional ports are connected and dumping the fdb entries. This problem is caused by the initially wrong value programmed to the REG_SW_LUE_CTRL_1 register. Setting SW_FLUSH_STP_TABLE and SW_FLUSH_MSTP_TABLE bits does not have an immediate effect. It is when ksz9477_flush_dyn_mac_table() is called then the SW_FLUSH_STP_TABLE bit takes effect and flushes all learned entries. After that call both bits are reset and so the next port flush will not cause such problem again. Fixes: b987e98e50ab ("dsa: add DSA switch driver for Microchip KSZ9477") Signed-off-by: Tristram Ha Link: https://patch.msgid.link/1718756202-2731-1-git-send-email-Tristram.Ha@microchip.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

net: dsa: microchip: ksz9477: port map correction in ALU table entry register

2023-02-01T07:23:16+00:00

[ Upstream commit 6c977c5c2e4c5d8ad1b604724cc344e38f96fe9b ] ALU table entry 2 register in KSZ9477 have bit positions reserved for forwarding port map. This field is referred in ksz9477_fdb_del() for clearing forward port map and alu table. But current fdb_del refer ALU table entry 3 register for accessing forward port map. Update ksz9477_fdb_del() to get forward port map from correct alu table entry register. With this bug, issue can be observed while deleting static MAC entries. Delete any specific MAC entry using "bridge fdb del" command. This should clear all the specified MAC entries. But it is observed that entries with self static alone are retained. Tested on LAN9370 EVB since ksz9477_fdb_del() is used common across LAN937x and KSZ series. Fixes: b987e98e50ab ("dsa: add DSA switch driver for Microchip KSZ9477") Signed-off-by: Rakesh Sankaranarayanan Reviewed-by: Vladimir Oltean Link: https://lore.kernel.org/r/20230118174735.702377-1-rakesh.sankaranarayanan@microchip.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

net: dsa: microchip: ksz9477: fix fdb_dump last invalid entry

2022-08-25T09:38:07+00:00

commit 36c0d935015766bf20d621c18313f17691bda5e3 upstream. In the ksz9477_fdb_dump function it reads the ALU control register and exit from the timeout loop if there is valid entry or search is complete. After exiting the loop, it reads the alu entry and report to the user space irrespective of entry is valid. It works till the valid entry. If the loop exited when search is complete, it reads the alu table. The table returns all ones and it is reported to user space. So bridge fdb show gives ff:ff:ff:ff:ff:ff as last entry for every port. To fix it, after exiting the loop the entry is reported only if it is valid one. Fixes: b987e98e50ab ("dsa: add DSA switch driver for Microchip KSZ9477") Signed-off-by: Arun Ramadoss Reviewed-by: Vladimir Oltean Link: https://lore.kernel.org/r/20220816105516.18350-1-arun.ramadoss@microchip.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman

net: dsa: microchip: add spi_device_id tables

2022-04-08T12:39:48+00:00

[ Upstream commit e981bc74aefc6a177b50c16cfa7023599799cf74 ] Add spi_device_id tables to avoid logs like "SPI driver ksz9477-switch has no spi_device_id". Signed-off-by: Claudiu Beznea Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

net: dsa: microchip: Added the condition for scheduling ksz_mib_read_work

2021-10-20T09:45:04+00:00

commit ef1100ef20f29aec4e62abeccdb5bdbebba1e378 upstream. When the ksz module is installed and removed using rmmod, kernel crashes with null pointer dereferrence error. During rmmod, ksz_switch_remove function tries to cancel the mib_read_workqueue using cancel_delayed_work_sync routine and unregister switch from dsa. During dsa_unregister_switch it calls ksz_mac_link_down, which in turn reschedules the workqueue since mib_interval is non-zero. Due to which queue executed after mib_interval and it tries to access dp->slave. But the slave is unregistered in the ksz_switch_remove function. Hence kernel crashes. To avoid this crash, before canceling the workqueue, resetted the mib_interval to 0. v1 -> v2: -Removed the if condition in ksz_mib_read_work Fixes: 469b390e1ba3 ("net: dsa: microchip: use delayed_work instead of timer + work") Signed-off-by: Arun Ramadoss Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

net: dsa: microchip: ksz8795: Use software untagging on CPU port

2021-08-18T06:59:19+00:00

commit 9130c2d30c17846287b803a9803106318cbe5266 upstream. On the CPU port, we can support both tagged and untagged VLANs at the same time by doing any necessary untagging in software rather than hardware. To enable that, keep the CPU port's Remove Tag flag cleared and set the dsa_switch::untag_bridge_pvid flag. Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller [bwh: Backport to 5.10: adjust context] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

net: dsa: microchip: ksz8795: Fix VLAN untagged flag change on deletion

2021-08-18T06:59:19+00:00

commit af01754f9e3c553a2ee63b4693c79a3956e230ab upstream. When a VLAN is deleted from a port, the flags in struct switchdev_obj_port_vlan are always 0. ksz8_port_vlan_del() copies the BRIDGE_VLAN_INFO_UNTAGGED flag to the port's Tag Removal flag, and therefore always clears it. In case there are multiple VLANs configured as untagged on this port - which seems useless, but is allowed - deleting one of them changes the remaining VLANs to be tagged. It's only ever necessary to change this flag when a VLAN is added to the port, so leave it unchanged in ksz8_port_vlan_del(). Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller [bwh: Backport to 5.10: adjust context] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

net: dsa: microchip: ksz8795: Reject unsupported VLAN configuration

2021-08-18T06:59:19+00:00

commit 8f4f58f88fe0d9bd591f21f53de7dbd42baeb3fa upstream. The switches supported by ksz8795 only have a per-port flag for Tag Removal. This means it is not possible to support both tagged and untagged VLANs on the same port. Reject attempts to add a VLAN that requires the flag to be changed, unless there are no VLANs currently configured. VID 0 is excluded from this check since it is untagged regardless of the state of the flag. On the CPU port we could support tagged and untagged VLANs at the same time. This will be enabled by a later patch. Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller [bwh: Backport to 5.10: - This configuration has to be detected and rejected in the port_vlan_prepare operation - ksz8795_port_vlan_add() has to check again to decide whether to change the Tag Removal flag, so put the common condition in a separate function - Handle VID ranges] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

net: dsa: microchip: ksz8795: Fix PVID tag insertion

2021-08-18T06:59:19+00:00

commit ef3b02a1d79b691f9a354c4903cf1e6917e315f9 upstream. ksz8795 has never actually enabled PVID tag insertion, and it also programmed the PVID incorrectly. To fix this: * Allow tag insertion to be controlled per ingress port. On most chips, set bit 2 in Global Control 19. On KSZ88x3 this control flag doesn't exist. * When adding a PVID: - Set the appropriate register bits to enable tag insertion on egress at every other port if this was the packet's ingress port. - Mask *out* the VID from the default tag, before or-ing in the new PVID. * When removing a PVID: - Clear the same control bits to disable tag insertion. - Don't update the default tag. This wasn't doing anything useful. Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver") Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller [bwh: Backport to 5.10: - Drop the KSZ88x3 cases as those chips are not supported here - Handle VID ranges in ksz8795_port_vlan_del()] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman