diff options
| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 09:53:16 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 17:29:38 +0200 |
| commit | e18ce49b5b8f957fb99d66990ff49d527f823210 (patch) | |
| tree | 7226c62fc4243393f4ed0a03b1f67d94ca7e25c6 /drivers/char | |
| parent | ptrace: permit ptracing of /sbin/init (diff) | |
| download | linux-e18ce49b5b8f957fb99d66990ff49d527f823210.tar.xz linux-e18ce49b5b8f957fb99d66990ff49d527f823210.zip | |
amiserial: prepare for locking relaxation in caller
Just wrap this one in a lock_kernel. As I understand it there is no M68K
SMP anyway.
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/amiserial.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c index 3d468f502d2d..8ab75a43231b 100644 --- a/drivers/char/amiserial.c +++ b/drivers/char/amiserial.c @@ -1074,6 +1074,7 @@ static int get_serial_info(struct async_struct * info, if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); + lock_kernel(); tmp.type = state->type; tmp.line = state->line; tmp.port = state->port; @@ -1084,6 +1085,7 @@ static int get_serial_info(struct async_struct * info, tmp.close_delay = state->close_delay; tmp.closing_wait = state->closing_wait; tmp.custom_divisor = state->custom_divisor; + unlock_kernel(); if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) return -EFAULT; return 0; @@ -1099,13 +1101,17 @@ static int set_serial_info(struct async_struct * info, if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) return -EFAULT; + + lock_kernel(); state = info->state; old_state = *state; change_irq = new_serial.irq != state->irq; change_port = (new_serial.port != state->port); - if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) + if(change_irq || change_port || (new_serial.xmit_fifo_size != state->xmit_fifo_size)) { + unlock_kernel(); return -EINVAL; + } if (!serial_isroot()) { if ((new_serial.baud_base != state->baud_base) || @@ -1122,8 +1128,10 @@ static int set_serial_info(struct async_struct * info, goto check_and_exit; } - if (new_serial.baud_base < 9600) + if (new_serial.baud_base < 9600) { + unlock_kernel(); return -EINVAL; + } /* * OK, past this point, all the error checking has been done. @@ -1157,6 +1165,7 @@ check_and_exit: } } else retval = startup(info); + unlock_kernel(); return retval; } |