diff options
| author | Linus Walleij | 2018-11-12 15:12:30 +0100 |
|---|---|---|
| committer | Ulf Hansson | 2018-12-17 08:26:24 +0100 |
| commit | ec5af091b28abf6b61c219f08b3407ae24073495 (patch) | |
| tree | 62833238cf947ab6e74e27b09c7768f1a14712c2 | |
| parent | 21f1e2d457ce678adc1269cef6e83cd66dc6fdc6 (diff) | |
mmc: slot-gpio: Allocate GPIO labels dynamically
The use of string pointers in the MMC slot GPIO context is
pretty dubious, allocating some 2*len extra bytes for each
label of the ro and wp pins.
Tidy this up using kasprintf() with dynamic allocation of
labels for these strings.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/core/slot-gpio.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c index 86803a3a04dc..e5bb86b02373 100644 --- a/drivers/mmc/core/slot-gpio.c +++ b/drivers/mmc/core/slot-gpio.c @@ -27,8 +27,8 @@ struct mmc_gpio { bool override_cd_active_level; irqreturn_t (*cd_gpio_isr)(int irq, void *dev_id); char *ro_label; + char *cd_label; u32 cd_debounce_delay_ms; - char cd_label[]; }; static irqreturn_t mmc_gpio_cd_irqt(int irq, void *dev_id) @@ -45,15 +45,19 @@ static irqreturn_t mmc_gpio_cd_irqt(int irq, void *dev_id) int mmc_gpio_alloc(struct mmc_host *host) { - size_t len = strlen(dev_name(host->parent)) + 4; struct mmc_gpio *ctx = devm_kzalloc(host->parent, - sizeof(*ctx) + 2 * len, GFP_KERNEL); + sizeof(*ctx), GFP_KERNEL); if (ctx) { - ctx->ro_label = ctx->cd_label + len; ctx->cd_debounce_delay_ms = 200; - snprintf(ctx->cd_label, len, "%s cd", dev_name(host->parent)); - snprintf(ctx->ro_label, len, "%s ro", dev_name(host->parent)); + ctx->cd_label = devm_kasprintf(host->parent, GFP_KERNEL, + "%s cd", dev_name(host->parent)); + if (!ctx->cd_label) + return -ENOMEM; + ctx->ro_label = devm_kasprintf(host->parent, GFP_KERNEL, + "%s ro", dev_name(host->parent)); + if (!ctx->ro_label) + return -ENOMEM; host->slot.handler_priv = ctx; host->slot.cd_irq = -EINVAL; } |