linux-kernel - [PATCH] SYSFS: Fix return values for sysdev_store

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Message-ID: <20081013100303.GA32199@basil.nowhere.org>
Date:	Mon, 13 Oct 2008 12:03:03 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	greg@...ah.com, linux-kernel@...r.kernel.org
Subject: [PATCH] SYSFS: Fix return values for sysdev_store_{ulong,int}

SYSFS: Fix return values for sysdev_store_{ulong,int}

Always return the full size instead of the consumed
length of the string in sysdev_store_{ulong,int}

This avoids EINVAL errors in some echo versions.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

Index: linux/drivers/base/sys.c
===================================================================
--- linux.orig/drivers/base/sys.c
+++ linux/drivers/base/sys.c
@@ -488,7 +488,8 @@ ssize_t sysdev_store_ulong(struct sys_de
 	if (end == buf)
 		return -EINVAL;
 	*(unsigned long *)(ea->var) = new;
-	return end - buf;
+	/* Always return full write size even if we didn't consume all */
+	return size;
 }
 EXPORT_SYMBOL_GPL(sysdev_store_ulong);
 
@@ -511,7 +512,8 @@ ssize_t sysdev_store_int(struct sys_devi
 	if (end == buf || new > INT_MAX || new < INT_MIN)
 		return -EINVAL;
 	*(int *)(ea->var) = new;
-	return end - buf;
+	/* Always return full write size even if we didn't consume all */
+	return size;
 }
 EXPORT_SYMBOL_GPL(sysdev_store_int);
 
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