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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-20 03:40:09 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-20 03:40:09 -0400 |
| commit | 9d5272f5e36155bcead69417fd12e98624e7faef (patch) | |
| tree | 770af81c03932ad4e508a12cca6f83fbb3527689 /drivers/tty/hvc/hvc_console.c | |
| parent | febd668d375caf13a7fcd93b3498366854de854a (diff) | |
| parent | 3a7c8fafd1b42adea229fd204132f6a2fb3cd2d9 (diff) | |
Merge tag 'noinstr-x86-kvm-2020-05-16' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into HEAD
Diffstat (limited to 'drivers/tty/hvc/hvc_console.c')
| -rw-r--r-- | drivers/tty/hvc/hvc_console.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 27284a2dcd2b..436cc51c92c3 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -302,10 +302,6 @@ int hvc_instantiate(uint32_t vtermno, int index, const struct hv_ops *ops) vtermnos[index] = vtermno; cons_ops[index] = ops; - /* reserve all indices up to and including this index */ - if (last_hvc < index) - last_hvc = index; - /* check if we need to re-register the kernel console */ hvc_check_console(index); @@ -960,13 +956,22 @@ struct hvc_struct *hvc_alloc(uint32_t vtermno, int data, cons_ops[i] == hp->ops) break; - /* no matching slot, just use a counter */ - if (i >= MAX_NR_HVC_CONSOLES) - i = ++last_hvc; + if (i >= MAX_NR_HVC_CONSOLES) { + + /* find 'empty' slot for console */ + for (i = 0; i < MAX_NR_HVC_CONSOLES && vtermnos[i] != -1; i++) { + } + + /* no matching slot, just use a counter */ + if (i == MAX_NR_HVC_CONSOLES) + i = ++last_hvc + MAX_NR_HVC_CONSOLES; + } hp->index = i; - cons_ops[i] = ops; - vtermnos[i] = vtermno; + if (i < MAX_NR_HVC_CONSOLES) { + cons_ops[i] = ops; + vtermnos[i] = vtermno; + } list_add_tail(&(hp->next), &hvc_structs); mutex_unlock(&hvc_structs_mutex); |