linux-kernel - [PATCH V5 1/2] spmi: remove wakeup command before slave probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1427305052-1284-2-git-send-email-gavidov@codeaurora.org>
Date:	Wed, 25 Mar 2015 11:37:31 -0600
From:	Gilad Avidov <gavidov@...eaurora.org>
To:	gavidov@...eaurora.org, sdharia@...eaurora.org,
	mlocke@...eaurora.org, linux-arm-msm@...r.kernel.org,
	gregkh@...uxfoundation.org, svarbanov@...sol.com
Cc:	linux-kernel@...r.kernel.org, iivanov@...sol.com,
	galak@...eaurora.org, agross@...eaurora.org
Subject: [PATCH V5 1/2] spmi: remove wakeup command before slave probe

According to spmi spec a slave powers up into startup state and then
transitions into active state. Thus, the wakeup command is not required
before calling the slave's probe. The wakeup command is only needed for
slaves that are in sleep state after receiving the sleep command.

Cc: galak@...eaurora.org
Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
Reviewed-by: Sagar Dharia <sdharia@...eaurora.org>
Acked-by: Josh Cartwright <joshc@....teric.us>
Signed-off-by: Gilad Avidov <gavidov@...eaurora.org>
---
 drivers/spmi/spmi.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c
index 1d92f51..9493843 100644
--- a/drivers/spmi/spmi.c
+++ b/drivers/spmi/spmi.c
@@ -1,4 +1,5 @@
-/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+/*
+ * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -316,11 +317,6 @@ static int spmi_drv_probe(struct device *dev)
 	struct spmi_device *sdev = to_spmi_device(dev);
 	int err;
 
-	/* Ensure the slave is in ACTIVE state */
-	err = spmi_command_wakeup(sdev);
-	if (err)
-		goto fail_wakeup;
-
 	pm_runtime_get_noresume(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
@@ -335,7 +331,6 @@ fail_probe:
 	pm_runtime_disable(dev);
 	pm_runtime_set_suspended(dev);
 	pm_runtime_put_noidle(dev);
-fail_wakeup:
 	return err;
 }
 
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/