diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/target/target_core_user.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/drivers/target/target_core_user.c b/drivers/target/target_core_user.c index 3b25ef3d5596..80ee130f8253 100644 --- a/drivers/target/target_core_user.c +++ b/drivers/target/target_core_user.c @@ -342,7 +342,6 @@ static inline bool tcmu_get_empty_block(struct tcmu_dev *udev, page = radix_tree_lookup(&udev->data_blocks, dbi); if (!page) { - if (atomic_add_return(1, &global_db_count) > TCMU_GLOBAL_MAX_BLOCKS) { atomic_dec(&global_db_count); @@ -352,14 +351,11 @@ static inline bool tcmu_get_empty_block(struct tcmu_dev *udev, /* try to get new page from the mm */ page = alloc_page(GFP_KERNEL); if (!page) - return false; + goto err_alloc; ret = radix_tree_insert(&udev->data_blocks, dbi, page); - if (ret) { - __free_page(page); - return false; - } - + if (ret) + goto err_insert; } if (dbi > udev->dbi_max) @@ -369,6 +365,11 @@ static inline bool tcmu_get_empty_block(struct tcmu_dev *udev, tcmu_cmd_set_dbi(tcmu_cmd, dbi); return true; +err_insert: + __free_page(page); +err_alloc: + atomic_dec(&global_db_count); + return false; } static bool tcmu_get_empty_blocks(struct tcmu_dev *udev, @@ -527,7 +528,7 @@ static inline size_t get_block_offset_user(struct tcmu_dev *dev, DATA_BLOCK_SIZE - remaining; } -static inline size_t iov_tail(struct tcmu_dev *udev, struct iovec *iov) +static inline size_t iov_tail(struct iovec *iov) { return (size_t)iov->iov_base + iov->iov_len; } @@ -566,7 +567,7 @@ static int scatter_data_area(struct tcmu_dev *udev, to += offset; if (*iov_cnt != 0 && - to_offset == iov_tail(udev, *iov)) { + to_offset == iov_tail(*iov)) { (*iov)->iov_len += copy_bytes; } else { new_iov(iov, iov_cnt, udev); @@ -722,10 +723,7 @@ static bool is_ring_space_avail(struct tcmu_dev *udev, struct tcmu_cmd *cmd, } } - if (!tcmu_get_empty_blocks(udev, cmd)) - return false; - - return true; + return tcmu_get_empty_blocks(udev, cmd); } static inline size_t tcmu_cmd_get_base_cmd_size(size_t iov_cnt) |