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| author | Tony Lindgren <tony@atomide.com> | 2020-07-02 19:44:20 +0200 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2020-07-02 19:22:41 +0200 |
| commit | 9f9113925018d500a95df539014d9ff11ac2c02d (patch) | |
| tree | 99f975ecc052e537d043061cce2ab5ab541f6841 /drivers/bus | |
| parent | Merge branch 'omap-for-v5.8/fixes-rc1' into fixes (diff) | |
| download | linux-9f9113925018d500a95df539014d9ff11ac2c02d.tar.xz linux-9f9113925018d500a95df539014d9ff11ac2c02d.zip | |
bus: ti-sysc: Fix wakeirq sleeping function called from invalid context
With CONFIG_DEBUG_ATOMIC_SLEEP enabled we can see the following with
wakeirqs and serial console idled:
BUG: sleeping function called from invalid context at drivers/bus/ti-sysc.c:242
...
(sysc_wait_softreset) from [<c0606894>] (sysc_enable_module+0x48/0x274)
(sysc_enable_module) from [<c0606c5c>] (sysc_runtime_resume+0x19c/0x1d8)
(sysc_runtime_resume) from [<c0606cf0>] (sysc_child_runtime_resume+0x58/0x84)
(sysc_child_runtime_resume) from [<c06eb7bc>] (__rpm_callback+0x30/0x12c)
(__rpm_callback) from [<c06eb8d8>] (rpm_callback+0x20/0x80)
(rpm_callback) from [<c06eb434>] (rpm_resume+0x638/0x7fc)
(rpm_resume) from [<c06eb658>] (__pm_runtime_resume+0x60/0x9c)
(__pm_runtime_resume) from [<c06edc08>] (handle_threaded_wake_irq+0x24/0x60)
(handle_threaded_wake_irq) from [<c01befec>] (irq_thread_fn+0x1c/0x78)
(irq_thread_fn) from [<c01bf30c>] (irq_thread+0x140/0x26c)
We have __pm_runtime_resume() call the sysc_runtime_resume() with spinlock
held and interrupts disabled.
Fixes: d46f9fbec719 ("bus: ti-sysc: Use optional clocks on for enable and wait for softreset bit")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/ti-sysc.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index bb54fb514e40..2ce8612f13a9 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -236,15 +236,14 @@ static int sysc_wait_softreset(struct sysc *ddata) syss_done = ddata->cfg.syss_mask; if (syss_offset >= 0) { - error = readx_poll_timeout(sysc_read_sysstatus, ddata, rstval, - (rstval & ddata->cfg.syss_mask) == - syss_done, - 100, MAX_MODULE_SOFTRESET_WAIT); + error = readx_poll_timeout_atomic(sysc_read_sysstatus, ddata, + rstval, (rstval & ddata->cfg.syss_mask) == + syss_done, 100, MAX_MODULE_SOFTRESET_WAIT); } else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) { - error = readx_poll_timeout(sysc_read_sysconfig, ddata, rstval, - !(rstval & sysc_mask), - 100, MAX_MODULE_SOFTRESET_WAIT); + error = readx_poll_timeout_atomic(sysc_read_sysconfig, ddata, + rstval, !(rstval & sysc_mask), + 100, MAX_MODULE_SOFTRESET_WAIT); } return error; |