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| author | Eugeniy Meshcheryakov <eugen@debian.org> | 2008-07-31 10:03:19 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-01 12:50:15 -0700 |
| commit | 3ab36ab68531ad90648fdeedcaf437f121572ede (patch) | |
| tree | 9a61fb71173caff9fdf29a9d3f3626d5c0fa26ef | |
| parent | 84ff7a001270258f71d6ab0d164f351e32c9718a (diff) | |
| download | linux-3.10-3ab36ab68531ad90648fdeedcaf437f121572ede.tar.gz linux-3.10-3ab36ab68531ad90648fdeedcaf437f121572ede.tar.bz2 linux-3.10-3ab36ab68531ad90648fdeedcaf437f121572ede.zip | |
try harder to load tty ldisc driver
Currently function tty_ldisc_get() tries to load an ldisc driver module
only when tty_ldisc_try_get() returns -EAGAIN. This happens only if
module is being unloaded. If ldisc module is not loaded
tty_ldisc_try_get() returns -EINVAL and this case is not handled in
tty_ldisc_get(), so request_module() is not called.
Attached patch fixes this by calling request_module() if
tty_ldisc_try_get() returned any error code.
I discovered this when my UMTS modem stopped working with 2.6.27-rc1
because module ppp_async was not loaded.
Signed-off-by: Eugeniy Meshcheryakov <eugen@debian.org>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/char/tty_ldisc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c index 241cbdea65a..f307f135cbf 100644 --- a/drivers/char/tty_ldisc.c +++ b/drivers/char/tty_ldisc.c @@ -169,7 +169,7 @@ static int tty_ldisc_get(int disc, struct tty_ldisc *ld) if (disc < N_TTY || disc >= NR_LDISCS) return -EINVAL; err = tty_ldisc_try_get(disc, ld); - if (err == -EAGAIN) { + if (err < 0) { request_module("tty-ldisc-%d", disc); err = tty_ldisc_try_get(disc, ld); } |