Re: [PATCH] tcmu: clean up the code and with one small fix

[Nicholas A. Bellinger]

On Tue, 2017-07-11 at 18:06 +0800, lixi...@cmss.chinamobile.com wrote:
> From: Xiubo Li 
> 
> Remove useless blank line and code and at the same time add one error
> path to catch the errors.
> 
> Signed-off-by: Xiubo Li 
> ---
>  drivers/target/target_core_user.c | 24 +++-
>  1 file changed, 11 insertions(+), 13 deletions(-)

Applied.

Thanks Xiubo.

Re: [PATCH] tcmu: clean up the code and with one small fix

[Mike Christie]

On 07/11/2017 05:06 AM, lixi...@cmss.chinamobile.com wrote:
> From: Xiubo Li 
> 
> Remove useless blank line and code and at the same time add one error
> path to catch the errors.
> 
> Signed-off-by: Xiubo Li 

Thanks.

Reviewed-by: Mike Christie 

[PATCH] tcmu: clean up the code and with one small fix

[lixiubo]

From: Xiubo Li 

Remove useless blank line and code and at the same time add one error
path to catch the errors.

Signed-off-by: Xiubo Li 
---
 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 3b25ef3..80ee130 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(>data_blocks, dbi);
if (!page) {
-
if (atomic_add_return(1, _db_count) >
TCMU_GLOBAL_MAX_BLOCKS) {
atomic_dec(_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(>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(_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)
-- 
1.8.3.1