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net/wireless: Use kmemdup rather than duplicating its implementation

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kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Fuqian Huang
2019-07-04 00:29:34 +08:00
committed by Kalle Valo
parent 0a3ce16947
commit ab8c31dd8c
3 changed files with 4 additions and 8 deletions
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6
drivers/net/wireless/ath/ath6kl/wmi.c
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@@ -3650,7 +3650,7 @@ static int ath6kl_wmi_send_action_cmd(struct wmi *wmi, u8 if_idx, u32 id,
if (wait)
return -EINVAL; /* Offload for wait not supported */
buf = kmalloc(data_len, GFP_KERNEL);
buf = kmemdup(data, data_len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
@@ -3661,7 +3661,6 @@ static int ath6kl_wmi_send_action_cmd(struct wmi *wmi, u8 if_idx, u32 id,
}
kfree(wmi->last_mgmt_tx_frame);
memcpy(buf, data, data_len);
wmi->last_mgmt_tx_frame = buf;
wmi->last_mgmt_tx_frame_len = data_len;
@@ -3689,7 +3688,7 @@ static int __ath6kl_wmi_send_mgmt_cmd(struct wmi *wmi, u8 if_idx, u32 id,
if (wait)
return -EINVAL; /* Offload for wait not supported */
buf = kmalloc(data_len, GFP_KERNEL);
buf = kmemdup(data, data_len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
@@ -3700,7 +3699,6 @@ static int __ath6kl_wmi_send_mgmt_cmd(struct wmi *wmi, u8 if_idx, u32 id,
}
kfree(wmi->last_mgmt_tx_frame);
memcpy(buf, data, data_len);
wmi->last_mgmt_tx_frame = buf;
wmi->last_mgmt_tx_frame_len = data_len;