[adm5120] fix an unbalanced spinlock issue

[openwrt.git] / target / linux / adm5120 / files / drivers / mtd / maps / adm5120-flash.c

diff --git a/target/linux/adm5120/files/drivers/mtd/maps/adm5120-flash.c b/target/linux/adm5120/files/drivers/mtd/maps/adm5120-flash.c
index e07fb96..824d2f5 100644 (file)
--- a/target/linux/adm5120/files/drivers/mtd/maps/adm5120-flash.c
+++ b/target/linux/adm5120/files/drivers/mtd/maps/adm5120-flash.c
@@ -220,14 +220,15 @@ static int adm5120_flash_initres(struct adm5120_flash_info *info)
        struct map_info *map = &info->amap.map;
        int err = 0;
 
-       info->res = request_mem_region(map->phys, map->size, map->name);
+       info->res = request_mem_region(map->phys, info->amap.window_size,
+                       map->name);
        if (info->res == NULL) {
                MAP_ERR(map, "could not reserve memory region\n");
                err = -ENOMEM;
                goto out;
        }
 
-       map->virt = ioremap_nocache(map->phys, map->size);
+       map->virt = ioremap_nocache(map->phys, info->amap.window_size);
        if (map->virt == NULL) {
                MAP_ERR(map, "failed to ioremap flash region\n");
                err = -ENOMEM;
@@ -244,7 +245,7 @@ static int adm5120_flash_initinfo(struct adm5120_flash_info *info,
        struct map_info *map = &info->amap.map;
        struct adm5120_flash_platform_data *pdata = dev->dev.platform_data;
        struct flash_desc *fdesc;
-       u32 t;
+       u32 t = 0;
 
        map->name = dev->dev.bus_id;
 
@@ -255,12 +256,18 @@ static int adm5120_flash_initinfo(struct adm5120_flash_info *info,
 
        fdesc = &flash_descs[dev->id];
 
-       /* get memory window size */
-       t = SW_READ_REG(MEMCTRL) >> fdesc->srs_shift;
-       t &= MEMCTRL_SRS_MASK;
-       info->amap.window_size = flash_sizes[t];
+       if (pdata)
+               info->amap.window_size = pdata->window_size;
+
+       if (info->amap.window_size == 0) {
+               /* get memory window size */
+               t = SW_READ_REG(MEMCTRL) >> fdesc->srs_shift;
+               t &= MEMCTRL_SRS_MASK;
+               info->amap.window_size = flash_sizes[t];
+       }
+
        if (info->amap.window_size == 0) {
-               MAP_ERR(map, "invalid flash size detected\n");
+               MAP_ERR(map, "unable to determine window size\n");
                goto err_out;
        }