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HID: alps: Save a memory allocation in 't4_read_write_register()' when writing data

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if 'read_flag' is false, there is no need to allocate and free memory.
We can simply avoid the memory allocation and pass NULL to kfree.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Christophe JAILLET 2018-03-19 21:53:27 +01:00 committed by Jiri Kosina
parent 605f077290
commit edb6cb3d7c
1 changed files with 2 additions and 2 deletions
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4
drivers/hid/hid-alps.c
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@ -171,7 +171,7 @@ static int t4_read_write_register(struct hid_device *hdev, u32 address,
int ret;
u16 check_sum;
u8 *input;
u8 *readbuf;
u8 *readbuf = NULL;
input = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
if (!input)
@ -204,8 +204,8 @@ static int t4_read_write_register(struct hid_device *hdev, u32 address,
goto exit;
}
readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
if (read_flag) {
readbuf = kzalloc(T4_FEATURE_REPORT_LEN, GFP_KERNEL);
if (!readbuf) {
ret = -ENOMEM;
goto exit;