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| author | Alan Cox <alan@lxorguk.ukuu.org.uk> | 2008-04-30 00:53:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:38 -0700 |
| commit | 7b130c0efd7acbdc3cf9b2e7cc9a26e923feec93 (patch) | |
| tree | c5d38927297ead7d4a337da767d279e1a5a5bf7f | |
| parent | e18ce49b5b8f957fb99d66990ff49d527f823210 (diff) | |
| download | op-kernel-dev-7b130c0efd7acbdc3cf9b2e7cc9a26e923feec93.zip op-kernel-dev-7b130c0efd7acbdc3cf9b2e7cc9a26e923feec93.tar.gz | |
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>
| -rw-r--r-- | drivers/char/cyclades.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c index e4f579c..23312f2 100644 --- a/drivers/char/cyclades.c +++ b/drivers/char/cyclades.c @@ -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 */ |
