From: Tilman Schmidt <tilman@imap.cc>
To: Karsten Keil <isdn@linux-pingi.de>, David Miller <davem@davemloft.net>
Cc: Hansjoerg Lipp <hjlipp@web.de>, Karsten Keil <keil@b1-systems.de>,
i4ldeveloper@listserv.isdn4linux.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] isdn/capi: make reset_ctr op truly optional
Date: Sun, 23 May 2010 13:02:08 +0200 (CEST) [thread overview]
Message-ID: <20100523-patch-gigaset-01.tilman@imap.cc> (raw)
In-Reply-To: <20100523-patch-gigaset-00.tilman@imap.cc>
The CAPI controller operation reset_ctr is marked as optional, and
not all drivers do implement it. Add a check to the kernel CAPI
whether it exists before trying to call it.
Impact: oops prevention
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
---
drivers/isdn/capi/kcapi.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c
index bd00dce..bde3c88 100644
--- a/drivers/isdn/capi/kcapi.c
+++ b/drivers/isdn/capi/kcapi.c
@@ -1147,6 +1147,12 @@ load_unlock_out:
if (ctr->state == CAPI_CTR_DETECTED)
goto reset_unlock_out;
+ if (ctr->reset_ctr == NULL) {
+ printk(KERN_DEBUG "kcapi: reset: no reset function\n");
+ retval = -ESRCH;
+ goto reset_unlock_out;
+ }
+
ctr->reset_ctr(ctr);
retval = wait_on_ctr_state(ctr, CAPI_CTR_DETECTED);
--
1.6.5.3.298.g39add
next prev parent reply other threads:[~2010-05-23 11:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-23 11:01 [PATCH 0/2] ISDN fixes for 2.6.35 Tilman Schmidt
2010-05-23 11:01 ` Karsten Keil
2010-05-24 6:52 ` David Miller
2010-05-23 11:02 ` Tilman Schmidt [this message]
2010-05-23 11:02 ` [PATCH 2/2] isdn/gigaset: remove dummy CAPI method implementations Tilman Schmidt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100523-patch-gigaset-01.tilman@imap.cc \
--to=tilman@imap.cc \
--cc=davem@davemloft.net \
--cc=hjlipp@web.de \
--cc=i4ldeveloper@listserv.isdn4linux.de \
--cc=isdn@linux-pingi.de \
--cc=keil@b1-systems.de \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).