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generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-02 04:21:35 +0000
on all my ARM boards, like: Unable to handle kernel NULL pointer dereference at virtual address 00000000 ... [<c04116d4>] (__list_del_entry_valid) from [<c05e8948>] (led_trigger_unregister+0x34/0xcc) [<c05e8948>] (led_trigger_unregister) from [<c05336c4>] (phy_led_triggers_unregister+0x28/0x34) [<c05336c4>] (phy_led_triggers_unregister) from [<c0531d44>] (phy_detach+0x30/0x74) [<c0531d44>] (phy_detach) from [<c0538bdc>] (sh_eth_close+0x64/0x9c) [<c0538bdc>] (sh_eth_close) from [<c04d4ce0>] (dpm_run_callback+0x48/0xc8) or: list_del corruption. prev->next should be dede6540, but was 2e323931 ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:52! ... [<c02f6d70>] (__list_del_entry_valid) from [<c0425168>] (led_trigger_unregister+0x34/0xcc) [<c0425168>] (led_trigger_unregister) from [<c03a05a0>] (phy_led_triggers_unregister+0x28/0x34) [<c03a05a0>] (phy_led_triggers_unregister) from [<c039ec04>] (phy_detach+0x30/0x74) [<c039ec04>] (phy_detach) from [<c03a4fc0>] (sh_eth_close+0x6c/0xa4) [<c03a4fc0>] (sh_eth_close) from [<c0483234>] (__dev_close_many+0xac/0xd0) As the only clue was a kernel message like sh-eth ee700000.ethernet eth0: No phy led trigger registered for speed(100) I had to bisected this, leading to commit 4567d686f5c6d955 ("phy: increase size of MII_BUS_ID_SIZE and bus_id"). Reverting that commit fixed the issue. More investigation revealed the crashes are due to the combination of two things: - Truncated LED trigger names, leading to duplicate names, and registration failures, - Bad error handling in case of registration failures. Both are fixed by this patch series. Changes compared to v1: - Add Reviewed-by, - New patch "net: phy: leds: Break dependency of phy.h on phy_led_triggers.h", - Drop moving the include of <linux/phy_led_triggers.h>, as <linux/phy.h> no longer includes it, - #include <linux/phy.h> from <linux/phy_led_triggers.h>. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')