[PATCH 2/2] mtd: m25p80: Make jedec_probe() return proper errno values
From: Anton Vorontsov <hidden>
Date: 2010-06-22 17:28:10
Also in:
lkml
Subsystem:
memory technology devices (mtd), the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
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 <redacted> Signed-off-by: Anton Vorontsov <redacted> --- This is for 2.6.36. 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 a610ca9..7bf5c45 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>
@@ -733,7 +735,7 @@ 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;
@@ -741,14 +743,6 @@ 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++) {
@@ -759,7 +753,7 @@ static const struct spi_device_id *__devinit jedec_probe(struct spi_device *spi) return &m25p_ids[tmp]; } } - return NULL; + return ERR_PTR(-ENODEV); }
@@ -804,8 +798,8 @@ 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
--
1.7.0.5