mmc: pwrseq_simple: fix error path in mmc_pwrseq_simple_alloc

The current error-path code (when gpiod_get_index() reports
an error) can never free pwrseq->reset_gpios[0], but might
try to tree pwrseq->reset_gpios[-1], which has unfortunate
consequences.

Signed-off-by: NeilBrown <neil@brown.name>
Fixes: 934f1f48330ed695927a51fa068dc5d673f2da19
Acked-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reported-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index e9f1d8d8461353cd88831c154ae6dc43fe994772..c53f14a7ce546533c300313a54078e1bad327bf9 100644 (file)
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -124,7 +124,7 @@ int mmc_pwrseq_simple_alloc(struct mmc_host *host, struct device *dev)
                    PTR_ERR(pwrseq->reset_gpios[i]) != -ENOSYS) {
                        ret = PTR_ERR(pwrseq->reset_gpios[i]);
 
-                       while (--i)
+                       while (i--)
                                gpiod_put(pwrseq->reset_gpios[i]);
 
                        goto clk_put;