Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756041Ab0BMNGG (ORCPT ); Sat, 13 Feb 2010 08:06:06 -0500 Received: from mail-fx0-f227.google.com ([209.85.220.227]:49010 "EHLO mail-fx0-f227.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755128Ab0BMNDj (ORCPT ); Sat, 13 Feb 2010 08:03:39 -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=XbXOsMTBOa8UBmLXHiOK7t/BVe1Q933DeR+9lxkDDPdr2/jvvhvbdk+dQjCq47+eRC VP5H7XjZ3Zd21wHFPP/2D0qdGQCIdXNjmWJEcXIs6/90HBhVPG0TkdG6v1j5d3Fmcr/X iTFRa9EQ2q55uvUGNHiDfzH/0BdTbtmVpWTVM= 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 06/14] MTD: nand: make suspend work if device is accessed by kernel threads. Date: Sat, 13 Feb 2010 15:03:05 +0200 Message-Id: <1266066193-17625-7-git-send-email-maximlevitsky@gmail.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1266066193-17625-1-git-send-email-maximlevitsky@gmail.com> References: <1266066193-17625-1-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 8f2958f..279b960 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/