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| author | Jeff Dike <jdike@addtoit.com> | 2008-02-04 22:31:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:31 -0800 |
| commit | 438ee6798cd8bfc44da725fca846367e19d86652 (patch) | |
| tree | 5bf5ccfeb363f4a4c7f8dfb10d24c1c9a2062b8a /arch/um | |
| parent | 83380cc1c9694a05bcdb7c95d293e99d3475d906 (diff) | |
| download | linux-438ee6798cd8bfc44da725fca846367e19d86652.tar.gz linux-438ee6798cd8bfc44da725fca846367e19d86652.tar.bz2 linux-438ee6798cd8bfc44da725fca846367e19d86652.zip | |
uml: DEBUG_SHIRQ fixes
A couple more DEBUG_SHIRQ fixes.
The previous mconsole blocking fix exposed the lack of O_NONBLOCK on the
mconsole socket.
Also, winch_interrupt started crashing because it is called at irq free time
and it tries to dereference tty->driver_data, which has already been set to
NULL.
I added some error cleanup in mconsole_init while I was there.
Cc: "Karol Swietlicki" <magotari@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/drivers/line.c | 8 | ||||
| -rw-r--r-- | arch/um/drivers/mconsole_kern.c | 8 |
2 files changed, 12 insertions, 4 deletions
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index fac058b49282..2c898c4d6b6a 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -774,9 +774,11 @@ static irqreturn_t winch_interrupt(int irq, void *data) tty = winch->tty; if (tty != NULL) { line = tty->driver_data; - chan_window_size(&line->chan_list, &tty->winsize.ws_row, - &tty->winsize.ws_col); - kill_pgrp(tty->pgrp, SIGWINCH, 1); + if (line != NULL) { + chan_window_size(&line->chan_list, &tty->winsize.ws_row, + &tty->winsize.ws_col); + kill_pgrp(tty->pgrp, SIGWINCH, 1); + } } out: if (winch->fd != -1) diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index fabd75f5bb5c..c953e1477be4 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -792,6 +792,8 @@ static int __init mconsole_init(void) printk(KERN_ERR "Failed to initialize management console\n"); return 1; } + if (os_set_fd_block(sock, 0)) + goto out; register_reboot_notifier(&reboot_notifier); @@ -800,7 +802,7 @@ static int __init mconsole_init(void) "mconsole", (void *)sock); if (err) { printk(KERN_ERR "Failed to get IRQ for management console\n"); - return 1; + goto out; } if (notify_socket != NULL) { @@ -816,6 +818,10 @@ static int __init mconsole_init(void) printk(KERN_INFO "mconsole (version %d) initialized on %s\n", MCONSOLE_VERSION, mconsole_socket_name); return 0; + + out: + os_close_file(sock); + return 1; } __initcall(mconsole_init); |