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>
diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
index 86803a3a..e5bb86b 100644
--- a/drivers/mmc/core/slot-gpio.c
+++ b/drivers/mmc/core/slot-gpio.c
@@ -27,8 +27,8 @@
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 @@
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;
}
