From mboxrd@z Thu Jan 1 00:00:00 1970 From: dedekind1@gmail.com (Artem Bityutskiy) Date: Mon, 30 Jan 2012 13:45:53 +0200 Subject: [PATCH RFC 2/2] mtd : Make the mtd_suspend return 0 if the suspend is not implemented In-Reply-To: <20120124090630.GR16726@n2100.arm.linux.org.uk> References: <1327306361-9803-1-git-send-email-shubhrajyoti@ti.com> <1327306361-9803-3-git-send-email-shubhrajyoti@ti.com> <20120124090630.GR16726@n2100.arm.linux.org.uk> Message-ID: <1327923953.2487.13.camel@sauron.fi.intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, 2012-01-24 at 09:06 +0000, Russell King - ARM Linux wrote: > > However, the bug made it into the 3.3 merge window, so shouldn't this > > bugfix be sent upstream immediately? > > David is the MTD maintainer, and Artem just helps out. I believe Artem > is waiting for David to finish travelling before asking David (last seen > at Hong Kong airport) to pull these fixes. David in turn will pass them > onto Linus. Plus, Linus only started adding to -rc1 yesterday, so its a > little early to expect this to be fixed. Hi, here is the latest version of the fix. http://git.infradead.org/users/dedekind/l2-mtd-2.6.git/commit/283d43b9ce2952535aa89c0195085e2a1b7e5fce Also attached. >>From 283d43b9ce2952535aa89c0195085e2a1b7e5fce Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Mon, 16 Jan 2012 11:07:16 +0200 Subject: [PATCH] mtd: fix MTD suspend Commits 3fe4bae88460869a8e553397cd9057a4ee7ca341 and 079c985e7a6f4ce60f931cebfdd5ee3c3 broke MTD suspend in 2 ways: 1. When the '->suspend' method is not present, we return -EOPNOTSUPP, but the callers of 'mtd_suspend()' expects 0 instead. 2. Checking of the 'mtd' parameter against NULL has been incorrectly removed in 'mtd_cls_suspend()'. This patch fixes the breakages. This has been found, analyzed, reported and tested by Rafael J. Wysocki . Note, this patch is not needed in the stable tree because it causes a regression introduced during the v3.3 merge window. Reported-by: Rafael J. Wysocki Tested-by: Rafael J. Wysocki Tested-by: Russell King Signed-off-by: Artem Bityutskiy --- drivers/mtd/mtdcore.c | 2 +- include/linux/mtd/mtd.h | 4 +--- 2 files changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index b265188..de96865 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -119,7 +119,7 @@ static int mtd_cls_suspend(struct device *dev, pm_message_t state) { struct mtd_info *mtd = dev_get_drvdata(dev); - return mtd_suspend(mtd); + return mtd ? mtd_suspend(mtd) : 0; } static int mtd_cls_resume(struct device *dev) diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 1a81fde..d8c7aad 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -427,9 +427,7 @@ static inline int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len) static inline int mtd_suspend(struct mtd_info *mtd) { - if (!mtd->suspend) - return -EOPNOTSUPP; - return mtd->suspend(mtd); + return mtd->suspend ? mtd->suspend(mtd) : 0; } static inline void mtd_resume(struct mtd_info *mtd) -- 1.7.7.6 -- Best Regards, Artem Bityutskiy -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-mtd-fix-MTD-suspend.patch Type: text/x-patch Size: 2094 bytes Desc: not available URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 836 bytes Desc: This is a digitally signed message part URL: