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| author | Alan Cox <alan@linux.intel.com> | 2012-03-02 14:59:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-03-08 11:10:27 -0800 |
| commit | edab558feba1e2826ae8d65506168d7ccea7aad9 (patch) | |
| tree | a964e46c12f83517af0d7b756f00005bb66f26f8 /drivers/tty/vt | |
| parent | dbca36eab48ee48dfc60b8f41ffad54160ebdd09 (diff) | |
| download | linux-edab558feba1e2826ae8d65506168d7ccea7aad9.tar.gz linux-edab558feba1e2826ae8d65506168d7ccea7aad9.tar.xz linux-edab558feba1e2826ae8d65506168d7ccea7aad9.zip | |
vt: sort out locking for font handling
The font methods are console_lock covered. Unfortunately they don't extend
the lock over all the needed tests.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/vt.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index ecdcc8a8f0ca..ce2b82343620 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -3969,9 +3969,6 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) int rc = -EINVAL; int c; - if (vc->vc_mode != KD_TEXT) - return -EINVAL; - if (op->data) { font.data = kmalloc(max_font_size, GFP_KERNEL); if (!font.data) @@ -3980,7 +3977,9 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) font.data = NULL; console_lock(); - if (vc->vc_sw->con_font_get) + if (vc->vc_mode != KD_TEXT) + rc = -EINVAL; + else if (vc->vc_sw->con_font_get) rc = vc->vc_sw->con_font_get(vc, &font); else rc = -ENOSYS; @@ -4062,7 +4061,9 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op) if (IS_ERR(font.data)) return PTR_ERR(font.data); console_lock(); - if (vc->vc_sw->con_font_set) + if (vc->vc_mode != KD_TEXT) + rc = -EINVAL; + else if (vc->vc_sw->con_font_set) rc = vc->vc_sw->con_font_set(vc, &font, op->flags); else rc = -ENOSYS; @@ -4078,8 +4079,6 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op) char *s = name; int rc; - if (vc->vc_mode != KD_TEXT) - return -EINVAL; if (!op->data) s = NULL; @@ -4089,6 +4088,10 @@ static int con_font_default(struct vc_data *vc, struct console_font_op *op) name[MAX_FONT_NAME - 1] = 0; console_lock(); + if (vc->vc_mode != KD_TEXT) { + console_unlock(); + return -EINVAL; + } if (vc->vc_sw->con_font_default) rc = vc->vc_sw->con_font_default(vc, &font, s); else @@ -4106,11 +4109,11 @@ static int con_font_copy(struct vc_data *vc, struct console_font_op *op) int con = op->height; int rc; - if (vc->vc_mode != KD_TEXT) - return -EINVAL; console_lock(); - if (!vc->vc_sw->con_font_copy) + if (vc->vc_mode != KD_TEXT) + rc = -EINVAL; + else if (!vc->vc_sw->con_font_copy) rc = -ENOSYS; else if (con < 0 || !vc_cons_allocated(con)) rc = -ENOTTY; |