• Leo Yan's avatar
    coresight: tmc: Fix bad register address for CLAIM · b436f384
    Leo Yan authored
    [ Upstream commit 323ed1e0 ]
    
    Commit 4d3ebd36 ("coreisght: tmc: Claim device before use") uses
    CLAIM tag to validate if the device is available, it needs to pass
    the device base address to access related registers.
    
    In the function tmc_etb_disable_hw() it wrongly passes the driver data
    pointer as register base address, thus it's easily to produce the kernel
    warning info like below:
    
    [   83.579898] WARNING: CPU: 4 PID: 2970 at drivers/hwtracing/coresight/coresight.c:207 coresight_disclaim_device_unlocked+0x44/0x80
    [   83.591448] Modules linked in:
    [   83.594485] CPU: 4 PID: 2970 Comm: uname Not tainted 4.19.0-rc6-00417-g721b509 #110
    [   83.602067] Hardware name: ARM Juno development board (r2) (DT)
    [   83.607932] pstate: 80000085 (Nzcv daIf -PAN -UAO)
    [   83.612681] pc : coresight_disclaim_device_unlocked+0x44/0x80
    [   83.618375] lr : coresight_disclaim_device_unlocked+0x44/0x80
    [   83.624064] sp : ffff00000fe3ba20
    [   83.627347] x29: ffff00000fe3ba20 x28: ffff80002d430dc0
    [   83.632618] x27: ffff800033177c00 x26: ffff80002eb44480
    [   83.637889] x25: 0000000000000001 x24: ffff800033c72600
    [   83.643160] x23: ffff0000099b11f8 x22: ffff0000099b11c8
    [   83.648430] x21: 0000000000000002 x20: ffff800033a90418
    [   83.653701] x19: ffff0000099b11c8 x18: 0000000000000000
    [   83.658971] x17: 0000000000000000 x16: 0000000000000000
    [   83.664241] x15: 0000000000000000 x14: 0000000000000000
    [   83.669511] x13: 0000000000000000 x12: 0000000000000000
    [   83.674782] x11: 0000000000000000 x10: 0000000000000000
    [   83.680052] x9 : 0000000000000000 x8 : 0000000000000001
    [   83.685322] x7 : 0000000000010000 x6 : ffff800033ebab18
    [   83.690593] x5 : ffff800033ebab18 x4 : ffff800033e6c698
    [   83.695862] x3 : 0000000000000001 x2 : 0000000000000000
    [   83.701133] x1 : 0000000000000000 x0 : 0000000000000001
    [   83.706404] Call trace:
    [   83.708830]  coresight_disclaim_device_unlocked+0x44/0x80
    [   83.714180]  coresight_disclaim_device+0x34/0x48
    [   83.718756]  tmc_disable_etf_sink+0xc4/0xf0
    [   83.722902]  coresight_disable_path_from+0xc8/0x240
    [   83.727735]  coresight_disable_path+0x24/0x30
    [   83.732053]  etm_event_stop+0x130/0x170
    [   83.735854]  etm_event_del+0x24/0x30
    [   83.739399]  event_sched_out.isra.51+0xcc/0x1e8
    [   83.743887]  group_sched_out.part.53+0x44/0xb0
    [   83.748291]  ctx_sched_out+0x298/0x2b8
    [   83.752005]  task_ctx_sched_out+0x74/0xa8
    [   83.755980]  perf_event_exit_task+0x140/0x418
    [   83.760298]  do_exit+0x3f4/0xcf0
    [   83.763497]  do_group_exit+0x5c/0xc0
    [   83.767041]  __arm64_sys_exit_group+0x24/0x28
    [   83.771359]  el0_svc_common+0x110/0x178
    [   83.775160]  el0_svc_handler+0x94/0xe8
    [   83.778875]  el0_svc+0x8/0xc
    [   83.781728] ---[ end trace 02d8d8eac46db9e5 ]---
    
    This patch is to fix this bug by using 'drvdata->base' as the
    register base address for CLAIM related operation.
    
    Fixes: 4d3ebd36 ("coreisght: tmc: Claim device before use")
    Cc: Suzuki Poulose <suzuki.poulose@arm.com>
    Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
    Cc: Mike Leach <mike.leach@linaro.org>
    Cc: Robert Walker <robert.walker@arm.com>
    Signed-off-by: 's avatarLeo Yan <leo.yan@linaro.org>
    Reviewed-by: 's avatarSuzuki K Poulose <suzuki.poulose@arm.com>
    Signed-off-by: 's avatarMathieu Poirier <mathieu.poirier@linaro.org>
    Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
    b436f384
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