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Diffstat (limited to 'lib/genalloc.c')
-rw-r--r--lib/genalloc.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/lib/genalloc.c b/lib/genalloc.c
index b35cfa9bc3d4..2a39bf62d8c1 100644
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -37,6 +37,11 @@
#include <linux/of_address.h>
#include <linux/of_device.h>
+static inline size_t chunk_size(const struct gen_pool_chunk *chunk)
+{
+ return chunk->end_addr - chunk->start_addr + 1;
+}
+
static int set_bits_ll(unsigned long *addr, unsigned long mask_to_set)
{
unsigned long val, nval;
@@ -188,7 +193,7 @@ int gen_pool_add_virt(struct gen_pool *pool, unsigned long virt, phys_addr_t phy
chunk->phys_addr = phys;
chunk->start_addr = virt;
- chunk->end_addr = virt + size;
+ chunk->end_addr = virt + size - 1;
atomic_set(&chunk->avail, size);
spin_lock(&pool->lock);
@@ -213,7 +218,7 @@ phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long addr)
rcu_read_lock();
list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
- if (addr >= chunk->start_addr && addr < chunk->end_addr) {
+ if (addr >= chunk->start_addr && addr <= chunk->end_addr) {
paddr = chunk->phys_addr + (addr - chunk->start_addr);
break;
}
@@ -242,7 +247,7 @@ void gen_pool_destroy(struct gen_pool *pool)
chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk);
list_del(&chunk->next_chunk);
- end_bit = (chunk->end_addr - chunk->start_addr) >> order;
+ end_bit = chunk_size(chunk) >> order;
bit = find_next_bit(chunk->bits, end_bit, 0);
BUG_ON(bit < end_bit);
@@ -283,7 +288,7 @@ unsigned long gen_pool_alloc(struct gen_pool *pool, size_t size)
if (size > atomic_read(&chunk->avail))
continue;
- end_bit = (chunk->end_addr - chunk->start_addr) >> order;
+ end_bit = chunk_size(chunk) >> order;
retry:
start_bit = pool->algo(chunk->bits, end_bit, start_bit, nbits,
pool->data);
@@ -330,8 +335,8 @@ void gen_pool_free(struct gen_pool *pool, unsigned long addr, size_t size)
nbits = (size + (1UL << order) - 1) >> order;
rcu_read_lock();
list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk) {
- if (addr >= chunk->start_addr && addr < chunk->end_addr) {
- BUG_ON(addr + size > chunk->end_addr);
+ if (addr >= chunk->start_addr && addr <= chunk->end_addr) {
+ BUG_ON(addr + size - 1 > chunk->end_addr);
start_bit = (addr - chunk->start_addr) >> order;
remain = bitmap_clear_ll(chunk->bits, start_bit, nbits);
BUG_ON(remain);
@@ -400,7 +405,7 @@ size_t gen_pool_size(struct gen_pool *pool)
rcu_read_lock();
list_for_each_entry_rcu(chunk, &pool->chunks, next_chunk)
- size += chunk->end_addr - chunk->start_addr;
+ size += chunk_size(chunk);
rcu_read_unlock();
return size;
}