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cyclades: Prepare for relaxed locking in callers 

Basically wrap it in lock_kernel where it is hard to prove the locking is
ok.

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: "John Stoffel" <john@stoffel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-04-30 00:53:16 -07:00 committed by Linus Torvalds
parent e18ce49b5b
commit 7b130c0efd
1 changed files with 17 additions and 12 deletions
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29
drivers/char/cyclades.c
View File

@ -3464,6 +3464,8 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file)
if (serial_paranoia_check(info, tty->name, __FUNCTION__))
return -ENODEV;
lock_kernel();
card = info->card;
channel = info->line - card->first_line;
if (!IS_CYC_Z(*card)) {
@ -3506,10 +3508,12 @@ static int cy_tiocmget(struct tty_struct *tty, struct file *file)
((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
} else {
result = 0;
unlock_kernel();
return -ENODEV;
}
}
unlock_kernel();
return result;
} /* cy_tiomget */
@ -3880,6 +3884,7 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
info->line, cmd, arg);
#endif
lock_kernel();
switch (cmd) {
case CYGETMON:
@ -3988,47 +3993,47 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
p_cuser = argp;
ret_val = put_user(cnow.cts, &p_cuser->cts);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.dsr, &p_cuser->dsr);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.rng, &p_cuser->rng);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.dcd, &p_cuser->dcd);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.rx, &p_cuser->rx);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.tx, &p_cuser->tx);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.frame, &p_cuser->frame);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.overrun, &p_cuser->overrun);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.parity, &p_cuser->parity);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.brk, &p_cuser->brk);
if (ret_val)
return ret_val;
break;
ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
if (ret_val)
return ret_val;
break;
ret_val = 0;
break;
default:
ret_val = -ENOIOCTLCMD;
}
unlock_kernel();
#ifdef CY_DEBUG_OTHER
printk(KERN_DEBUG "cyc:cy_ioctl done\n");
#endif
return ret_val;
} /* cy_ioctl */