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| author | Jiri Slaby (SUSE) <jirislaby@kernel.org> | 2024-01-22 12:03:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-27 18:08:53 -0800 |
| commit | eb881ebab593fdf8325bb35143e5135dcd7a346b (patch) | |
| tree | 64441a4acb2fce40b59fb3a878b1474e0fbf4d74 /drivers/tty/vt | |
| parent | fe4f6beb59a95a051c226e70fafe87b3de9dd0d0 (diff) | |
| download | linux-stable-eb881ebab593fdf8325bb35143e5135dcd7a346b.tar.gz linux-stable-eb881ebab593fdf8325bb35143e5135dcd7a346b.tar.bz2 linux-stable-eb881ebab593fdf8325bb35143e5135dcd7a346b.zip | |
use clamp() for counts in csi_?() handlers
The count to process is supposed to be between 1 and vc->vc_cols -
vc->state.x (or rows and .y). clamp() can be used exactly for this,
instead of ifs and min().
Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Tested-by: Helge Deller <deller@gmx.de> # parisc STI console
Link: https://lore.kernel.org/r/20240122110401.7289-14-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/vt.c | 27 |
1 files changed, 5 insertions, 22 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index bf77d962eeb4..05baf9ca23f2 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1574,12 +1574,7 @@ static void csi_K(struct vc_data *vc, int vpar) /* erase the following vpar positions */ static void csi_X(struct vc_data *vc, unsigned int vpar) { /* not vt100? */ - unsigned int count; - - if (!vpar) - vpar++; - - count = min(vpar, vc->vc_cols - vc->state.x); + unsigned int count = clamp(vpar, 1, vc->vc_cols - vc->state.x); vc_uniscr_clear_line(vc, vc->state.x, count); scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); @@ -2010,20 +2005,14 @@ static void setterm_command(struct vc_data *vc) /* console_lock is held */ static void csi_at(struct vc_data *vc, unsigned int nr) { - if (nr > vc->vc_cols - vc->state.x) - nr = vc->vc_cols - vc->state.x; - else if (!nr) - nr = 1; + nr = clamp(nr, 1, vc->vc_cols - vc->state.x); insert_char(vc, nr); } /* console_lock is held */ static void csi_L(struct vc_data *vc, unsigned int nr) { - if (nr > vc->vc_rows - vc->state.y) - nr = vc->vc_rows - vc->state.y; - else if (!nr) - nr = 1; + nr = clamp(nr, 1, vc->vc_rows - vc->state.y); con_scroll(vc, vc->state.y, vc->vc_bottom, SM_DOWN, nr); vc->vc_need_wrap = 0; } @@ -2031,20 +2020,14 @@ static void csi_L(struct vc_data *vc, unsigned int nr) /* console_lock is held */ static void csi_P(struct vc_data *vc, unsigned int nr) { - if (nr > vc->vc_cols - vc->state.x) - nr = vc->vc_cols - vc->state.x; - else if (!nr) - nr = 1; + nr = clamp(nr, 1, vc->vc_cols - vc->state.x); delete_char(vc, nr); } /* console_lock is held */ static void csi_M(struct vc_data *vc, unsigned int nr) { - if (nr > vc->vc_rows - vc->state.y) - nr = vc->vc_rows - vc->state.y; - else if (!nr) - nr=1; + nr = clamp(nr, 1, vc->vc_rows - vc->state.y); con_scroll(vc, vc->state.y, vc->vc_bottom, SM_UP, nr); vc->vc_need_wrap = 0; } |