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From: Huacai Chen <chenhc@lemote.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J . Wysocki" <rafael@kernel.org>,
	Sudeep Holla <sudeep.holla@arm.com>,
	linux-kernel@vger.kernel.org, Fuxin Zhang <zhangfx@lemote.com>,
	Zhangjin Wu <wuzhangjin@gmail.com>,
	Huacai Chen <chenhuacai@gmail.com>,
	Huacai Chen <chenhc@lemote.com>,
	stable@vger.kernel.org
Subject: [PATCH V3] cacheinfo: Keep the old value if of_property_read_u32 fails
Date: Wed, 19 Dec 2018 16:16:03 +0800	[thread overview]
Message-ID: <1545207363-7402-1-git-send-email-chenhc@lemote.com> (raw)

Commit 448a5a552f336bd7b847b1951 ("drivers: base: cacheinfo: use OF
property_read_u32 instead of get_property,read_number") makes cache
size and number_of_sets be 0 if DT doesn't provide there values. I
think this is unreasonable so make them keep the old values, which is
the same as old kernels.

Fixes: 448a5a552f33 ("drivers: base: cacheinfo: use OF property_read_u32 instead of get_property,read_number")
Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
---
V2: Add Cc and Reviewed-by
V3: Add ChangeLog

 drivers/base/cacheinfo.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index cf78fa6..a735953 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -79,8 +79,7 @@ static void cache_size(struct cacheinfo *this_leaf, struct device_node *np)
 	ct_idx = get_cacheinfo_idx(this_leaf->type);
 	propname = cache_type_info[ct_idx].size_prop;
 
-	if (of_property_read_u32(np, propname, &this_leaf->size))
-		this_leaf->size = 0;
+	of_property_read_u32(np, propname, &this_leaf->size);
 }
 
 /* not cache_line_size() because that's a macro in include/linux/cache.h */
@@ -114,8 +113,7 @@ static void cache_nr_sets(struct cacheinfo *this_leaf, struct device_node *np)
 	ct_idx = get_cacheinfo_idx(this_leaf->type);
 	propname = cache_type_info[ct_idx].nr_sets_prop;
 
-	if (of_property_read_u32(np, propname, &this_leaf->number_of_sets))
-		this_leaf->number_of_sets = 0;
+	of_property_read_u32(np, propname, &this_leaf->number_of_sets);
 }
 
 static void cache_associativity(struct cacheinfo *this_leaf)
-- 
2.7.0


             reply	other threads:[~2018-12-19  8:22 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-19  8:16 Huacai Chen [this message]
2019-01-22  0:51 ` [PATCH V3] cacheinfo: Keep the old value if of_property_read_u32 fails Huacai Chen
2019-01-22 10:30   ` Sudeep Holla
2019-01-22 12:51 ` Greg Kroah-Hartman

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