rtc: pcf2127: fix pcf2127_nvmem_read/write() returns
[ Upstream commit ba1c30bf3f2536f248d262c6f257b5a787305991 ]
These functions should return zero on success. Non-zero returns are
treated as error. On some paths, this doesn't matter but in
nvmem_cell_read() a non-zero return would be passed to ERR_PTR() and
lead to an Oops.
Fixes: d6c3029f32
("rtc: pcf2127: add support for accessing internal static RAM")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201022070451.GA2817669@mwanda
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -230,10 +230,8 @@ static int pcf2127_nvmem_read(void *priv, unsigned int offset,
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if (ret)
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return ret;
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ret = regmap_bulk_read(pcf2127->regmap, PCF2127_REG_RAM_RD_CMD,
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return regmap_bulk_read(pcf2127->regmap, PCF2127_REG_RAM_RD_CMD,
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val, bytes);
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return ret ?: bytes;
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}
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static int pcf2127_nvmem_write(void *priv, unsigned int offset,
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@ -248,10 +246,8 @@ static int pcf2127_nvmem_write(void *priv, unsigned int offset,
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if (ret)
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return ret;
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ret = regmap_bulk_write(pcf2127->regmap, PCF2127_REG_RAM_WRT_CMD,
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return regmap_bulk_write(pcf2127->regmap, PCF2127_REG_RAM_WRT_CMD,
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val, bytes);
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return ret ?: bytes;
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}
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/* watchdog driver */
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