From ec0a7517dc25b4cca8a694fd61e09771bffba022 Mon Sep 17 00:00:00 2001 From: Simon Baatz Date: Sun, 9 Jun 2013 22:14:11 +0200 Subject: [PATCH] mmc: return mmc_of_parse() errors to caller In addition to just logging errors encountered during DT parsing or allocating GPIO slots for CD/WP, mmc_of_parse() now returns with an error. In particular, this is needed if the GPIO allocation may return EPROBE_DEFER. Signed-off-by: Simon Baatz Reviewed-by: Ulf Hansson Signed-off-by: Chris Ball --- drivers/mmc/core/host.c | 30 +++++++++++++++++++++++++----- include/linux/mmc/host.h | 2 +- 2 files changed, 26 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 2a3593d..89f5849 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -306,7 +306,7 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host) * parse the properties and set respective generic mmc-host flags and * parameters. */ -void mmc_of_parse(struct mmc_host *host) +int mmc_of_parse(struct mmc_host *host) { struct device_node *np; u32 bus_width; @@ -315,7 +315,7 @@ void mmc_of_parse(struct mmc_host *host) int len, ret, gpio; if (!host->parent || !host->parent->of_node) - return; + return 0; np = host->parent->of_node; @@ -338,6 +338,7 @@ void mmc_of_parse(struct mmc_host *host) default: dev_err(host->parent, "Invalid \"bus-width\" value %ud!\n", bus_width); + return -EINVAL; } /* f_max is obtained from the optional "max-frequency" property */ @@ -367,18 +368,22 @@ void mmc_of_parse(struct mmc_host *host) host->caps |= MMC_CAP_NEEDS_POLL; gpio = of_get_named_gpio_flags(np, "cd-gpios", 0, &flags); + if (gpio == -EPROBE_DEFER) + return gpio; if (gpio_is_valid(gpio)) { if (!(flags & OF_GPIO_ACTIVE_LOW)) gpio_inv_cd = true; ret = mmc_gpio_request_cd(host, gpio); - if (ret < 0) + if (ret < 0) { dev_err(host->parent, "Failed to request CD GPIO #%d: %d!\n", gpio, ret); - else + return ret; + } else { dev_info(host->parent, "Got CD GPIO #%d.\n", gpio); + } } if (explicit_inv_cd ^ gpio_inv_cd) @@ -389,14 +394,23 @@ void mmc_of_parse(struct mmc_host *host) explicit_inv_wp = of_property_read_bool(np, "wp-inverted"); gpio = of_get_named_gpio_flags(np, "wp-gpios", 0, &flags); + if (gpio == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto out; + } if (gpio_is_valid(gpio)) { if (!(flags & OF_GPIO_ACTIVE_LOW)) gpio_inv_wp = true; ret = mmc_gpio_request_ro(host, gpio); - if (ret < 0) + if (ret < 0) { dev_err(host->parent, "Failed to request WP GPIO: %d!\n", ret); + goto out; + } else { + dev_info(host->parent, "Got WP GPIO #%d.\n", + gpio); + } } if (explicit_inv_wp ^ gpio_inv_wp) host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; @@ -413,6 +427,12 @@ void mmc_of_parse(struct mmc_host *host) host->pm_caps |= MMC_PM_KEEP_POWER; if (of_find_property(np, "enable-sdio-wakeup", &len)) host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; + + return 0; + +out: + mmc_gpio_free_cd(host); + return ret; } EXPORT_SYMBOL(mmc_of_parse); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 2e34ee5..eb2e6e1 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -369,7 +369,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *); int mmc_add_host(struct mmc_host *); void mmc_remove_host(struct mmc_host *); void mmc_free_host(struct mmc_host *); -void mmc_of_parse(struct mmc_host *host); +int mmc_of_parse(struct mmc_host *host); static inline void *mmc_priv(struct mmc_host *host) { -- 2.7.4