Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=438ee6798cd8bfc44da725fca846367e19d86652
Commit: 438ee6798cd8bfc44da725fca846367e19d86652
Parent: 83380cc1c9694a05bcdb7c95d293e99d3475d906
Author: Jeff Dike <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 4 22:31:19 2008 -0800
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Feb 5 09:44:31 2008 -0800
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" <[EMAIL PROTECTED]>
Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
arch/um/drivers/line.c | 8 +++++---
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 fac058b..2c898c4 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 fabd75f..c953e14 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);
-
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