block/swim3: Fix -EBUSY error when re-opening device after unmount

[platform/kernel/linux-exynos.git] / drivers / block / swim3.c

diff --git a/drivers/block/swim3.c b/drivers/block/swim3.c
index 0d7527c..2f7acdb 100644 (file)
--- a/drivers/block/swim3.c
+++ b/drivers/block/swim3.c
@@ -1027,7 +1027,11 @@ static void floppy_release(struct gendisk *disk, fmode_t mode)
        struct swim3 __iomem *sw = fs->swim3;
 
        mutex_lock(&swim3_mutex);
-       if (fs->ref_count > 0 && --fs->ref_count == 0) {
+       if (fs->ref_count > 0)
+               --fs->ref_count;
+       else if (fs->ref_count == -1)
+               fs->ref_count = 0;
+       if (fs->ref_count == 0) {
                swim3_action(fs, MOTOR_OFF);
                out_8(&sw->control_bic, 0xff);
                swim3_select(fs, RELAX);