[ARM] S3C24XX: ADC: Check pending queue before freeing adc client

Check pending queue and remove the adc client being released.

Signed-off-by: Ramax Lo <ramaxlo@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c24xx/adc.c b/arch/arm/plat-s3c24xx/adc.c
index bc6f6a14dd12..91adfa71c172 100644
--- a/arch/arm/plat-s3c24xx/adc.c
+++ b/arch/arm/plat-s3c24xx/adc.c
@@ -190,6 +190,23 @@ EXPORT_SYMBOL_GPL(s3c_adc_register);
 void s3c_adc_release(struct s3c_adc_client *client)
 {
         /* We should really check that nothing is in progress. */
+        if (adc_dev->cur == client)
+                adc_dev->cur = NULL;
+        if (adc_dev->ts_pend == client)
+                adc_dev->ts_pend = NULL;
+        else {
+                struct list_head *p, *n;
+                struct s3c_adc_client *tmp;
+
+                list_for_each_safe(p, n, &adc_pending) {
+                        tmp = list_entry(p, struct s3c_adc_client, pend);
+                        if (tmp == client)
+                                list_del(&tmp->pend);
+                }
+        }
+
+        if (adc_dev->cur == NULL)
+                s3c_adc_try(adc_dev);
         kfree(client);
 }
 EXPORT_SYMBOL_GPL(s3c_adc_release);