All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ivo van Doorn <ivdoorn@gmail.com>
To: "John W. Linville" <linville@tuxdriver.com>,
	users@rt2x00.serialmonkey.com, linux-wireless@vger.kernel.org,
	Lars Ericsson <lars_ericsson@telia.com>
Subject: [PATCH 01/06] rt2x00: Antenna diversity does not work in 2.6.35
Date: Wed, 8 Sep 2010 20:55:36 +0200	[thread overview]
Message-ID: <201009082055.38033.IvDoorn@gmail.com> (raw)

From: Lars Ericsson <lars_ericsson@telia.com>

The test if antenna diversity is at all enabled uses a local variable
'flags' to prepare the test condition, but uses 'ant->flags' when the test
is evaluated. The effect is that the diversity evaluation will never start.
I can see two solutions, use the 'flag' in the test condition or revert the
local flag change. My attached patch took alternative two.

Then the evaluation start but it will still not switch antenna. The problem
is a code section in rt2x00lib_config_antenna (). The effect of that code
section is that any change the diversity function perform will be
effectively shorten and no antenna selection command issued. The attached
patch will filter out any ANTENNA_SW_DIVERSITY setting but forward all
other

Signed-off-by: Lars Ericsson <lars_ericsson@telia.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
---
 drivers/net/wireless/rt2x00/rt2x00config.c |    4 ++--
 drivers/net/wireless/rt2x00/rt2x00link.c   |   12 ++++--------
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index 34f34fa..db09a64 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -129,12 +129,12 @@ void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 	 */
 	if (!(ant->flags & ANTENNA_RX_DIVERSITY))
 		config.rx = rt2x00lib_config_antenna_check(config.rx, def->rx);
-	else
+	else if(config.rx == ANTENNA_SW_DIVERSITY)
 		config.rx = active->rx;
 
 	if (!(ant->flags & ANTENNA_TX_DIVERSITY))
 		config.tx = rt2x00lib_config_antenna_check(config.tx, def->tx);
-	else
+	else if (config.tx == ANTENNA_SW_DIVERSITY)
 		config.tx = active->tx;
 
 	/*
diff --git a/drivers/net/wireless/rt2x00/rt2x00link.c b/drivers/net/wireless/rt2x00/rt2x00link.c
index 666cef3..4d534e9 100644
--- a/drivers/net/wireless/rt2x00/rt2x00link.c
+++ b/drivers/net/wireless/rt2x00/rt2x00link.c
@@ -188,7 +188,6 @@ static void rt2x00lib_antenna_diversity_eval(struct rt2x00_dev *rt2x00dev)
 static bool rt2x00lib_antenna_diversity(struct rt2x00_dev *rt2x00dev)
 {
 	struct link_ant *ant = &rt2x00dev->link.ant;
-	unsigned int flags = ant->flags;
 
 	/*
 	 * Determine if software diversity is enabled for
@@ -196,13 +195,13 @@ static bool rt2x00lib_antenna_diversity(struct rt2x00_dev *rt2x00dev)
 	 * Always perform this check since within the link
 	 * tuner interval the configuration might have changed.
 	 */
-	flags &= ~ANTENNA_RX_DIVERSITY;
-	flags &= ~ANTENNA_TX_DIVERSITY;
+	ant->flags &= ~ANTENNA_RX_DIVERSITY;
+	ant->flags &= ~ANTENNA_TX_DIVERSITY;
 
 	if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
-		flags |= ANTENNA_RX_DIVERSITY;
+		ant->flags |= ANTENNA_RX_DIVERSITY;
 	if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
-		flags |= ANTENNA_TX_DIVERSITY;
+		ant->flags |= ANTENNA_TX_DIVERSITY;
 
 	if (!(ant->flags & ANTENNA_RX_DIVERSITY) &&
 	    !(ant->flags & ANTENNA_TX_DIVERSITY)) {
@@ -210,9 +209,6 @@ static bool rt2x00lib_antenna_diversity(struct rt2x00_dev *rt2x00dev)
 		return true;
 	}
 
-	/* Update flags */
-	ant->flags = flags;
-
 	/*
 	 * If we have only sampled the data over the last period
 	 * we should now harvest the data. Otherwise just evaluate
-- 
1.7.2.2


             reply	other threads:[~2010-09-08 18:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-08 18:55 Ivo van Doorn [this message]
2010-09-08 18:56 ` [PATCH 02/06] rt2x00: Initialize AMPDU_BA_WINSIZE register Ivo van Doorn
2010-09-08 18:56   ` [PATCH 03/06] rt2x00: Check for specific changed flags when updating the erp config Ivo van Doorn
2010-09-08 18:56     ` [PATCH 04/06] rt2x00: Mask out unused interrupts in rt2800pci Ivo van Doorn
2010-09-08 18:57       ` [PATCH 05/06] rt2x00: Enable missing interrupts in rt61pci Ivo van Doorn
2010-09-08 18:57         ` [PATCH 06/06] rt2x00: fix oops in rt2x00lib_txdone with rt61pci Ivo van Doorn

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=201009082055.38033.IvDoorn@gmail.com \
    --to=ivdoorn@gmail.com \
    --cc=lars_ericsson@telia.com \
    --cc=linux-wireless@vger.kernel.org \
    --cc=linville@tuxdriver.com \
    --cc=users@rt2x00.serialmonkey.com \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.