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console: Delete dummy con_font_set() and con_font_default() callback implementations

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.con_font_set and .con_font_default callbacks should not pass `struct
console_font *` as a parameter, since `struct console_font` is a UAPI
structure.

We are trying to let them use our new kernel font descriptor, `struct
font_desc` instead. To make that work slightly easier, first delete all of
their no-op implementations used by dummy consoles.

This will make KD_FONT_OP_SET and KD_FONT_OP_SET_DEFAULT ioctl() requests
on dummy consoles start to fail and return `-ENOSYS`, which is intended,
since no user should ever expect such operations to succeed on dummy
consoles.

Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/9952c7538d2a32bb1a82af323be482e7afb3dedf.1605169912.git.yepeilin.cs@gmail.com
This commit is contained in:
Peilin Ye 2020-11-12 07:11:20 -05:00 • committed by Daniel Vetter
parent 7a089ec7d7
commit 259a252c1f
2 changed files with 0 additions and 29 deletions
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15
drivers/usb/misc/sisusbvga/sisusb_con.c
View file

@ -1345,19 +1345,6 @@ static int sisusbdummycon_blank(struct vc_data *vc, int blank, int mode_switch)
return 0;
}
static int sisusbdummycon_font_set(struct vc_data *vc,
struct console_font *font,
unsigned int flags)
{
return 0;
}
static int sisusbdummycon_font_default(struct vc_data *vc,
struct console_font *font, char *name)
{
return 0;
}
static const struct consw sisusb_dummy_con = {
.owner = THIS_MODULE,
.con_startup = sisusbdummycon_startup,
@ -1370,8 +1357,6 @@ static const struct consw sisusb_dummy_con = {
.con_scroll = sisusbdummycon_scroll,
.con_switch = sisusbdummycon_switch,
.con_blank = sisusbdummycon_blank,
.con_font_set = sisusbdummycon_font_set,
.con_font_default = sisusbdummycon_font_default,
};
int

14
drivers/video/console/dummycon.c
View file

@ -124,18 +124,6 @@ static int dummycon_switch(struct vc_data *vc)
return 0;
}
static int dummycon_font_set(struct vc_data *vc, struct console_font *font,
unsigned int flags)
{
return 0;
}
static int dummycon_font_default(struct vc_data *vc,
struct console_font *font, char *name)
{
return 0;
}
/*
* The console `switch' structure for the dummy console
*
@ -154,7 +142,5 @@ const struct consw dummy_con = {
.con_scroll = dummycon_scroll,
.con_switch = dummycon_switch,
.con_blank = dummycon_blank,
.con_font_set = dummycon_font_set,
.con_font_default = dummycon_font_default,
};
EXPORT_SYMBOL_GPL(dummy_con);