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regmap: fix page selection for noinc writes 

[ Upstream commit 05669b6317 ]

Non-incrementing writes can fail if register + length crosses page
border. However for non-incrementing writes we should not check for page
border crossing. Fix this by passing additional flag to _regmap_raw_write
and passing length to _regmap_select_page basing on the flag.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: cdf6b11daa ("regmap: Add regmap_noinc_write API")
Link: https://lore.kernel.org/r/20200917153405.3139200-2-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Dmitry Baryshkov 2020-09-17 18:34:05 +03:00 committed by Greg Kroah-Hartman
parent 47fef0ebc1
commit 283a323455
3 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/base/regmap/internal.h
View File

@ -259,7 +259,7 @@ bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
int regcache_lookup_reg(struct regmap *map, unsigned int reg);
int _regmap_raw_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len);
const void *val, size_t val_len, bool noinc);
void regmap_async_complete_cb(struct regmap_async *async, int ret);

2
drivers/base/regmap/regcache.c
View File

@ -717,7 +717,7 @@ static int regcache_sync_block_raw_flush(struct regmap *map, const void **data,
map->cache_bypass = true;
ret = _regmap_raw_write(map, base, *data, count * val_bytes);
ret = _regmap_raw_write(map, base, *data, count * val_bytes, false);
if (ret)
dev_err(map->dev, "Unable to sync registers %#x-%#x. %d\n",
base, cur - map->reg_stride, ret);

21
drivers/base/regmap/regmap.c
View File

@ -1468,7 +1468,7 @@ static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes,
}
static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
const void *val, size_t val_len)
const void *val, size_t val_len, bool noinc)
{
struct regmap_range_node *range;
unsigned long flags;
@ -1527,7 +1527,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
win_residue, val_len / map->format.val_bytes);
ret = _regmap_raw_write_impl(map, reg, val,
win_residue *
map->format.val_bytes);
map->format.val_bytes, noinc);
if (ret != 0)
return ret;
@ -1541,7 +1541,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
win_residue = range->window_len - win_offset;
}
ret = _regmap_select_page(map, &reg, range, val_num);
ret = _regmap_select_page(map, &reg, range, noinc ? 1 : val_num);
if (ret != 0)
return ret;
}
@ -1749,7 +1749,8 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
map->work_buf +
map->format.reg_bytes +
map->format.pad_bytes,
map->format.val_bytes);
map->format.val_bytes,
false);
}
static inline void *_regmap_map_get_context(struct regmap *map)
@ -1843,7 +1844,7 @@ int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val)
EXPORT_SYMBOL_GPL(regmap_write_async);
int _regmap_raw_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len)
const void *val, size_t val_len, bool noinc)
{
size_t val_bytes = map->format.val_bytes;
size_t val_count = val_len / val_bytes;
@ -1864,7 +1865,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
/* Write as many bytes as possible with chunk_size */
for (i = 0; i < chunk_count; i++) {
ret = _regmap_raw_write_impl(map, reg, val, chunk_bytes);
ret = _regmap_raw_write_impl(map, reg, val, chunk_bytes, noinc);
if (ret)
return ret;
@ -1875,7 +1876,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
/* Write remaining bytes */
if (val_len)
ret = _regmap_raw_write_impl(map, reg, val, val_len);
ret = _regmap_raw_write_impl(map, reg, val, val_len, noinc);
return ret;
}
@ -1908,7 +1909,7 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
map->lock(map->lock_arg);
ret = _regmap_raw_write(map, reg, val, val_len);
ret = _regmap_raw_write(map, reg, val, val_len, false);
map->unlock(map->lock_arg);
@ -1966,7 +1967,7 @@ int regmap_noinc_write(struct regmap *map, unsigned int reg,
write_len = map->max_raw_write;
else
write_len = val_len;
ret = _regmap_raw_write(map, reg, val, write_len);
ret = _regmap_raw_write(map, reg, val, write_len, true);
if (ret)
goto out_unlock;
val = ((u8 *)val) + write_len;
@ -2443,7 +2444,7 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg,
map->async = true;
ret = _regmap_raw_write(map, reg, val, val_len);
ret = _regmap_raw_write(map, reg, val, val_len, false);
map->async = false;