linux-kernel - [53/55] iwl3945: disable hw scan by default

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Message-Id: <20110429185657.739612508@clark.kroah.org>
Date:	Fri, 29 Apr 2011 11:56:16 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Stanislaw Gruszka <sgruszka@...hat.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [53/55] iwl3945: disable hw scan by default

2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Stanislaw Gruszka <sgruszka@...hat.com>

commit 0263aa45293838b514b8af674a03faf040991a90 upstream.

After new NetworkManager 0.8.996 changes, hardware scanning is causing
microcode errors as reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=683571
and sometimes kernel crashes:
https://bugzilla.redhat.com/show_bug.cgi?id=688252

Also with hw scan there are very bad performance on some systems
as reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=671366

Since Intel no longer supports 3945, there is no chance to get proper
firmware fixes, we need workaround problems by disable hardware scanning
by default.

Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/net/wireless/iwlwifi/iwl3945-base.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -94,6 +94,7 @@ MODULE_LICENSE("GPL");
 struct iwl_mod_params iwl3945_mod_params = {
 	.sw_crypto = 1,
 	.restart_fw = 1,
+	.disable_hw_scan = 1,
 	/* the rest are 0 by default */
 };
 
@@ -4317,7 +4318,7 @@ MODULE_PARM_DESC(debug, "debug output ma
 #endif
 module_param_named(disable_hw_scan, iwl3945_mod_params.disable_hw_scan,
 		   int, S_IRUGO);
-MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
+MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 1)");
 module_param_named(fw_restart3945, iwl3945_mod_params.restart_fw, int, S_IRUGO);
 MODULE_PARM_DESC(fw_restart3945, "restart firmware in case of error");
 


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