Commit 182846a0 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman

tty: vt, remove reduntant check

MAX_NR_CONSOLES and MAX_NR_USER_CONSOLES are both 63 since they were
introduced in 1.1.54. And since vc_allocate does:

if (currcons >= MAX_NR_CONSOLES)
	return -ENXIO;

if (!vc_cons[currcons].d) {
	if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
		return -EPERM;
}

the second check is pointless. Remove both the check and the macro
MAX_NR_USER_CONSOLES.
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
Reported-by: default avatarFugang Duan <fugang.duan@nxp.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b8995f52
...@@ -768,10 +768,6 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */ ...@@ -768,10 +768,6 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */
struct vc_data *vc; struct vc_data *vc;
struct vt_notifier_param param; struct vt_notifier_param param;
/* prevent users from taking too much memory */
if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE))
return -EPERM;
/* due to the granularity of kmalloc, we waste some memory here */ /* due to the granularity of kmalloc, we waste some memory here */
/* the alloc is done in two steps, to optimize the common situation /* the alloc is done in two steps, to optimize the common situation
of a 25x80 console (structsize=216, screenbuf_size=4000) */ of a 25x80 console (structsize=216, screenbuf_size=4000) */
......
...@@ -8,7 +8,6 @@ ...@@ -8,7 +8,6 @@
*/ */
#define MIN_NR_CONSOLES 1 /* must be at least 1 */ #define MIN_NR_CONSOLES 1 /* must be at least 1 */
#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */ #define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
/* Note: the ioctl VT_GETSTATE does not work for /* Note: the ioctl VT_GETSTATE does not work for
consoles 16 and higher (since it returns a short) */ consoles 16 and higher (since it returns a short) */
......
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