Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755276Ab0BIQ63 (ORCPT ); Tue, 9 Feb 2010 11:58:29 -0500 Received: from mail-bw0-f223.google.com ([209.85.218.223]:38923 "EHLO mail-bw0-f223.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755263Ab0BIQ6Z (ORCPT ); Tue, 9 Feb 2010 11:58:25 -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=x4ttyU/InKCZB3/zs6JPIDRA2ZCk+Sr3Zya/iWDoJkr+JTt0a9TEMmQ85Lo4eE/vgN FPs5qd+ds5RpmW++kF6EZEzxwIJUnS3WuCxnjE4CQ4eG/0Ik+vWYOib9smKHW03Bl9/W mQ9Y2oENQJhpe1GkVe2jLgk3+cylWFDTY56eU= From: Maxim Levitsky To: David Woodhouse Cc: Artem Bityutskiy , linux-mtd , linux-kernel , Alex Dubov , joern , Thomas Gleixner , "stanley.miao" , Vitaly Wool , Maxim Levitsky Subject: [PATCH 11/17] MTD: nand: make suspend work if device is accessed by kernel threads. Date: Tue, 9 Feb 2010 18:57:39 +0200 Message-Id: <1265734665-22656-12-git-send-email-maximlevitsky@gmail.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1265734665-22656-1-git-send-email-maximlevitsky@gmail.com> References: <1265734665-22656-1-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 insize 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 64b0f10..2ff9c02 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -744,9 +744,6 @@ 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/