From 02eb1d9d3bc307e2b540b8c095fa19342789f86d Mon Sep 17 00:00:00 2001
From: Ido Yariv <ido@wizery.com>
Date: Sun, 17 Jun 2012 20:30:05 +0300
Subject: [PATCH] wlcore: Change read/write ops to return errors
While bus operations may fail, either due to HW or FW issues, these are
never propagated to higher layers. As a result, the core driver has no
way of knowing that the operations failed, and will only recover if high
level logic requires it (e.g. no command completion).
Change read/write bus operations to return errors to let higher layer
functionality handle these.
Signed-off-by: Ido Yariv <ido@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
---
drivers/net/wireless/ti/wlcore/sdio.c | 16 ++++++++++------
drivers/net/wireless/ti/wlcore/spi.c | 14 +++++++++-----
drivers/net/wireless/ti/wlcore/wlcore_i.h | 6 +++---
3 files changed, 22 insertions(+), 14 deletions(-)
diff --git a/drivers/net/wireless/ti/wlcore/sdio.c b/drivers/net/wireless/ti/wlcore/sdio.c
index 4edaa20acfb1b..9069dc93b1bca 100644
--- a/drivers/net/wireless/ti/wlcore/sdio.c
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -71,8 +71,8 @@ static void wl1271_sdio_set_block_size(struct device *child,
sdio_release_host(func);
}
-static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
- size_t len, bool fixed)
+static int wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
+ size_t len, bool fixed)
{
int ret;
struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
@@ -103,12 +103,14 @@ static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
sdio_release_host(func);
- if (ret)
+ if (WARN_ON(ret))
dev_err(child->parent, "sdio read failed (%d)\n", ret);
+
+ return ret;
}
-static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
- size_t len, bool fixed)
+static int wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
+ size_t len, bool fixed)
{
int ret;
struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
@@ -139,8 +141,10 @@ static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
sdio_release_host(func);
- if (ret)
+ if (WARN_ON(ret))
dev_err(child->parent, "sdio write failed (%d)\n", ret);
+
+ return ret;
}
static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
diff --git a/drivers/net/wireless/ti/wlcore/spi.c b/drivers/net/wireless/ti/wlcore/spi.c
index 553cd3cbb98c0..d6768e9d7dabb 100644
--- a/drivers/net/wireless/ti/wlcore/spi.c
+++ b/drivers/net/wireless/ti/wlcore/spi.c
@@ -193,8 +193,8 @@ static int wl12xx_spi_read_busy(struct device *child)
return -ETIMEDOUT;
}
-static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
- size_t len, bool fixed)
+static int wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
+ size_t len, bool fixed)
{
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
struct wl1271 *wl = dev_get_drvdata(child);
@@ -238,7 +238,7 @@ static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) &&
wl12xx_spi_read_busy(child)) {
memset(buf, 0, chunk_len);
- return;
+ return 0;
}
spi_message_init(&m);
@@ -256,10 +256,12 @@ static void wl12xx_spi_raw_read(struct device *child, int addr, void *buf,
buf += chunk_len;
len -= chunk_len;
}
+
+ return 0;
}
-static void wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
- size_t len, bool fixed)
+static int wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
+ size_t len, bool fixed)
{
struct wl12xx_spi_glue *glue = dev_get_drvdata(child->parent);
struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS];
@@ -304,6 +306,8 @@ static void wl12xx_spi_raw_write(struct device *child, int addr, void *buf,
}
spi_sync(to_spi_device(glue->dev), &m);
+
+ return 0;
}
static struct wl1271_if_operations spi_ops = {
diff --git a/drivers/net/wireless/ti/wlcore/wlcore_i.h b/drivers/net/wireless/ti/wlcore/wlcore_i.h
index 8260b1e9288ab..5ab31ff4080e2 100644
--- a/drivers/net/wireless/ti/wlcore/wlcore_i.h
+++ b/drivers/net/wireless/ti/wlcore/wlcore_i.h
@@ -209,9 +209,9 @@ struct wl1271_scan {
};
struct wl1271_if_operations {
- void (*read)(struct device *child, int addr, void *buf, size_t len,
- bool fixed);
- void (*write)(struct device *child, int addr, void *buf, size_t len,
+ int (*read)(struct device *child, int addr, void *buf, size_t len,
+ bool fixed);
+ int (*write)(struct device *child, int addr, void *buf, size_t len,
bool fixed);
void (*reset)(struct device *child);
void (*init)(struct device *child);
--
2.30.2