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vt: Grab console_lock around con_is_bound in show_bind

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Not really harmful not to, but also not harm in grabbing the lock. And
this shuts up a new WARNING I introduced in commit ddde3c18b7 ("vt:
More locking checks").

Reported-by: Jens Remus <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Nicolas Pitre <[email protected]>
Cc: Martin Hostettler <[email protected]>
Cc: Adam Borowski <[email protected]>
Cc: Mikulas Patocka <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Sam Ravnborg <[email protected]>
Fixes: ddde3c18b7 ("vt: More locking checks")
Signed-off-by: Daniel Vetter <[email protected]>
Tested-by: Jens Remus <[email protected]>
Acked-by: Sam Ravnborg <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Daniel Vetter 2019-07-18 10:09:03 +02:00 • committed by Greg Kroah-Hartman
commit 61d51456f3
1 changed files with 5 additions and 1 deletions
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6
drivers/tty/vt/vt.c
View file

@ -3771,7 +3771,11 @@ static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct con_driver *con = dev_get_drvdata(dev);
int bind = con_is_bound(con->con);
int bind;
console_lock();
bind = con_is_bound(con->con);
console_unlock();
return snprintf(buf, PAGE_SIZE, "%i\n", bind);
}