diff options
| author | Anton Vorontsov <avorontsov@mvista.com> | 2010-06-22 20:57:42 +0400 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-08-04 10:58:24 +0100 |
| commit | 9d2c4f3fe50a6d07275de91b392aaaf4773bc8b6 (patch) | |
| tree | 64e1ed26300e4bfdfc5406de2dd7097fc2a4198d | |
| parent | f7b000904a848b64c36e3b4d0715744aaf345767 (diff) | |
| download | linux-9d2c4f3fe50a6d07275de91b392aaaf4773bc8b6.tar.bz2 | |
mtd: m25p80: Make jedec_probe() return proper errno values
spi_write_then_read() may return its own return codes (e.g. -EIO),
so let's propagate the value down to the probe().
Also, remove jedec == 0 check, it isn't needed as nowadays we use
dedicated SPI device IDs for non-JEDEC flashes.
Suggested-by: Barry Song <21cnbao@gmail.com>
Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| -rw-r--r-- | drivers/mtd/devices/m25p80.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index ff7627a3d075..48bf325e9e84 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -16,6 +16,8 @@ */ #include <linux/init.h> +#include <linux/err.h> +#include <linux/errno.h> #include <linux/module.h> #include <linux/device.h> #include <linux/interrupt.h> @@ -734,7 +736,7 @@ static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi) if (tmp < 0) { DEBUG(MTD_DEBUG_LEVEL0, "%s: error %d reading JEDEC ID\n", dev_name(&spi->dev), tmp); - return NULL; + return ERR_PTR(tmp); } jedec = id[0]; jedec = jedec << 8; @@ -742,14 +744,6 @@ static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi) jedec = jedec << 8; jedec |= id[2]; - /* - * Some chips (like Numonyx M25P80) have JEDEC and non-JEDEC variants, - * which depend on technology process. Officially RDID command doesn't - * exist for non-JEDEC chips, but for compatibility they return ID 0. - */ - if (jedec == 0) - return NULL; - ext_jedec = id[3] << 8 | id[4]; for (tmp = 0; tmp < ARRAY_SIZE(m25p_ids) - 1; tmp++) { @@ -760,7 +754,7 @@ static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi) return &m25p_ids[tmp]; } } - return NULL; + return ERR_PTR(-ENODEV); } @@ -805,8 +799,8 @@ static int __devinit m25p_probe(struct spi_device *spi) const struct spi_device_id *jid; jid = jedec_probe(spi); - if (!jid) { - return -ENODEV; + if (IS_ERR(jid)) { + return PTR_ERR(jid); } else if (jid != id) { /* * JEDEC knows better, so overwrite platform ID. We |