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platform/x86: thinkpad_acpi: Take hotkey_mutex during hotkey_exit()

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hotkey_exit() already takes the mutex around the hotkey_poll_stop_sync()
call, but not around the other calls.

commit 38831eaf7d ("platform/x86: thinkpad_acpi: use lockdep
annotations") has added lockdep_assert_held() checks to various hotkey
functions.

These lockdep_assert_held() checks fail causing WARN() backtraces in
dmesg due to missing locking in hotkey_exit(), fix this.

Fixes: 38831eaf7d ("platform/x86: thinkpad_acpi: use lockdep annotations")
Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20240424122834.19801-2-hdegoede@redhat.com
This commit is contained in:
Hans de Goede
2024-04-24 14:28:11 +02:00
parent 5c94664cf2
commit e397c56429
1 changed files with 3 additions and 2 deletions
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5
drivers/platform/x86/thinkpad_acpi.c
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@@ -3044,10 +3044,9 @@ static void tpacpi_send_radiosw_update(void)
static void hotkey_exit(void)
{
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
mutex_lock(&hotkey_mutex);
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
hotkey_poll_stop_sync();
mutex_unlock(&hotkey_mutex);
#endif
dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
"restoring original HKEY status and mask\n");
@@ -3057,6 +3056,8 @@ static void hotkey_exit(void)
hotkey_mask_set(hotkey_orig_mask)) |
hotkey_status_set(false)) != 0)
pr_err("failed to restore hot key mask to BIOS defaults\n");
mutex_unlock(&hotkey_mutex);
}
static void __init hotkey_unmap(const unsigned int scancode)