From: Xiubo Li <lixiubo@cmss.chinamobile.com>
Date: Tue, 11 Jul 2017 18:06:41 +0800
Subject: tcmu: clean up the code and with one small fix
Git-commit: daf78c305148c5a52f75a7fd88461ffa7066aec6
Patch-mainline: v4.13-rc1
References: fate#323946
Remove useless blank line and code and at the same time add one error
path to catch the errors.
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Acked-by: Lee Duncan <lduncan@suse.com>
---
drivers/target/target_core_user.c | 24 +++++++++++-------------
1 file 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)