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regmap: pass buffer size to regmap_raw_read() in regcache_hw_init()
regcache_hw_init() uses regmap_raw_read() to initialize cache when reg_defaults_raw isn't provided. The last parameter to regmap_raw_read() is buffer size in bytes, however regcache_hw_init() called it with number of registers to read instead, which cause problem if they aren't one byte wide in cache. This wasn't triggered by any of current in-tree drivers since they either have one-byte registers or provide reg_defaults_raw explicitly. Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -57,7 +57,7 @@ static int regcache_hw_init(struct regmap *map)
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bool cache_bypass = map->cache_bypass;
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dev_warn(map->dev, "No cache defaults, reading back from HW\n");
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/* Bypass the cache access till data read from HW*/
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/* Bypass the cache access till data read from HW */
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map->cache_bypass = true;
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tmp_buf = kmalloc(map->cache_size_raw, GFP_KERNEL);
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if (!tmp_buf) {
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@ -65,7 +65,7 @@ static int regcache_hw_init(struct regmap *map)
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goto err_free;
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}
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ret = regmap_raw_read(map, 0, tmp_buf,
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map->num_reg_defaults_raw);
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map->cache_size_raw);
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map->cache_bypass = cache_bypass;
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if (ret < 0)
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goto err_cache_free;
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