From: "D. Starke" <daniel.starke@siemens.com>
To: linux-serial@vger.kernel.org, gregkh@linuxfoundation.org,
jirislaby@kernel.org
Cc: linux-kernel@vger.kernel.org, Daniel Starke <daniel.starke@siemens.com>
Subject: [PATCH 18/20] tty: n_gsm: fix implicit CR bit encoding in address field
Date: Thu, 14 Apr 2022 02:42:23 -0700 [thread overview]
Message-ID: <20220414094225.4527-18-daniel.starke@siemens.com> (raw)
In-Reply-To: <20220414094225.4527-1-daniel.starke@siemens.com>
From: Daniel Starke <daniel.starke@siemens.com>
n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
the newer 27.010 here. Chapter 5.2.1.2 describes the encoding of the
address field within the frame header. It is made up of the DLCI address,
command/response (CR) bit and EA bit.
Use the predefined CR value instead of a plain 2 in alignment to the
remaining code and to make the encoding obvious.
Fixes: e1eaea46bb40 ("tty: n_gsm line discipline")
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
---
drivers/tty/n_gsm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 1e135a71860f..ecd2ecc61b14 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -754,7 +754,7 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg)
*--dp = msg->ctrl;
if (gsm->initiator)
- *--dp = (msg->addr << 2) | 2 | EA;
+ *--dp = (msg->addr << 2) | CR | EA;
else
*--dp = (msg->addr << 2) | EA;
*fcs = gsm_fcs_add_block(INIT_FCS, dp , msg->data - dp);
--
2.25.1
next prev parent reply other threads:[~2022-04-14 9:46 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 9:42 [PATCH 01/20] tty: n_gsm: fix missing mux reset on config change at responder D. Starke
2022-04-14 9:42 ` [PATCH 02/20] tty: n_gsm: fix restart handling via CLD command D. Starke
2022-04-14 9:42 ` [PATCH 03/20] tty: n_gsm: fix decoupled mux resource D. Starke
2022-04-14 9:42 ` [PATCH 04/20] tty: n_gsm: fix mux cleanup after unregister tty device D. Starke
2022-04-14 9:42 ` [PATCH 05/20] tty: n_gsm: fix wrong signal octet encoding in convergence layer type 2 D. Starke
2022-04-14 9:42 ` [PATCH 06/20] tty: n_gsm: fix frame reception handling D. Starke
2022-04-14 9:42 ` [PATCH 07/20] tty: n_gsm: fix malformed counter for out of frame data D. Starke
2022-04-14 9:42 ` [PATCH 08/20] tty: n_gsm: fix insufficient txframe size D. Starke
2022-04-14 9:42 ` [PATCH 09/20] tty: n_gsm: fix wrong DLCI release order D. Starke
2022-04-14 9:42 ` [PATCH 10/20] tty: n_gsm: fix missing explicit ldisc flush D. Starke
2022-04-14 9:42 ` [PATCH 11/20] tty: n_gsm: fix wrong command retry handling D. Starke
2022-04-14 9:42 ` [PATCH 12/20] tty: n_gsm: fix wrong command frame length field encoding D. Starke
2022-04-14 9:42 ` [PATCH 13/20] tty: n_gsm: fix wrong signal octets encoding in MSC D. Starke
2022-04-14 9:42 ` [PATCH 14/20] tty: n_gsm: fix missing tty wakeup in convergence layer type 2 D. Starke
2022-04-14 9:42 ` [PATCH 15/20] tty: n_gsm: fix missing update of modem controls after DLCI open D. Starke
2022-04-15 6:29 ` Greg KH
2022-04-19 8:07 ` [PATCH v2 " D. Starke
2022-04-19 10:07 ` Greg KH
2022-04-14 9:42 ` [PATCH 16/20] tty: n_gsm: fix invalid command/response bit check for UI/UIH frames D. Starke
2022-04-15 6:31 ` Greg KH
2022-04-19 8:17 ` [PATCH v2 16/20] tty: n_gsm: clean up dead code in gsm_queue() D. Starke
2022-04-19 10:06 ` Greg KH
2022-04-19 10:07 ` Greg KH
2022-04-14 9:42 ` [PATCH 17/20] tty: n_gsm: fix reset fifo race condition D. Starke
2022-04-14 9:42 ` D. Starke [this message]
2022-04-15 6:33 ` [PATCH 18/20] tty: n_gsm: fix implicit CR bit encoding in address field Greg KH
2022-04-19 8:19 ` [PATCH v2 18/20] tty: n_gsm: clean up " D. Starke
2022-04-19 10:06 ` Greg KH
2022-04-14 9:42 ` [PATCH 19/20] tty: n_gsm: fix wrong behavior of gsm_carrier_raised() on debug D. Starke
2022-04-15 6:34 ` Greg KH
2022-04-14 9:42 ` [PATCH 20/20] tty: n_gsm: fix incorrect UA handling D. Starke
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