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| author | Jiri Slaby (SUSE) <jirislaby@kernel.org> | 2023-01-12 11:01:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-19 17:06:42 +0300 |
| commit | 441c938168afdb747801d22adc1f2f21b5e204d7 (patch) | |
| tree | 8033fb00c3edee64901f9b388bfaaad3d75501d7 /drivers/tty/vt/vt.c | |
| parent | feb36abbedea2644bf31693aa287a33a3a9fbd7c (diff) | |
| download | linux-441c938168afdb747801d22adc1f2f21b5e204d7.tar.xz | |
tty: vt: replace BUG_ON() by WARN_ON_ONCE()
No need to panic in vc_uniscr_copy_line(), just warn. This should never
happen though, as vc_uniscr_check() is supposed to be called before
vc_uniscr_copy_line(). And the former checks vc->vc_uni_lines already.
In any case, use _ONCE as vc_uniscr_copy_line() is called repeatedly for
each line. So don't flood the logs, just in case.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230112080136.4929-7-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt/vt.c')
| -rw-r--r-- | drivers/tty/vt/vt.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 0487d7d20f73..f81f77464f85 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -535,7 +535,8 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, int offset = row * vc->vc_size_row + col * 2; unsigned long pos; - BUG_ON(!uni_lines); + if (WARN_ON_ONCE(!uni_lines)) + return; pos = (unsigned long)screenpos(vc, offset, viewed); if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { |