From: Ido Yariv <ido@xxxxxxxxxx> 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@xxxxxxxxxx> Signed-off-by: Luciano Coelho <coelho@xxxxxx> --- 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 4edaa20..9069dc9 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 553cd3c..d6768e9 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 8260b1e..5ab31ff 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); -- 1.7.10 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html