Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754511Ab0BVSml (ORCPT ); Mon, 22 Feb 2010 13:42:41 -0500 Received: from mail-fx0-f219.google.com ([209.85.220.219]:56979 "EHLO mail-fx0-f219.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753883Ab0BVSkL (ORCPT ); Mon, 22 Feb 2010 13:40:11 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=lnCYM7+D35BLDr2MTyxfLZghb7b+DbYOCirxgVvRi7ewZt65P4Lz8G4mxMP3//3SZi F3sc/0yOR+KDPTjm5MjylQ+aJxwZRAKE0qnPYsmcEilHD8E0wpsB0JHQ28p0YRIp6Bd7 T7Cml6hf5C/prqjL7VikL7G+1j/D7i3ivpjI4= From: Maxim Levitsky To: David Woodhouse Cc: linux-mtd , linux-kernel , Alex Dubov , joern , Thomas Gleixner , , Vitaly Wool , Maxim Levitsky Subject: [PATCH 07/15] MTD: nand: make suspend work if device is accessed by kernel threads. Date: Mon, 22 Feb 2010 20:39:34 +0200 Message-Id: <1266863982-5258-8-git-send-email-maximlevitsky@gmail.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1266863982-5258-1-git-send-email-maximlevitsky@gmail.com> References: <1266863982-5258-1-git-send-email-maximlevitsky@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1156 Lines: 34 Since all userspace threads are frozen at the time the nand_suspend is called, they aren't inside any nand function. We don't call try_to_freeze in nand ether. Thus the only user that can be inside the nand functions is an non freezeable kernel thread. Thus we can safely wait for it to finish. Signed-off-by: Maxim Levitsky --- drivers/mtd/nand/nand_base.c | 3 --- 1 files changed, 0 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index ed62e1e..7442b3a 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -773,9 +773,6 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) chip->state = FL_PM_SUSPENDED; spin_unlock(lock); return 0; - } else { - spin_unlock(lock); - return -EAGAIN; } } set_current_state(TASK_UNINTERRUPTIBLE); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/