From: Fuqian Huang Date: Wed, 3 Jul 2019 16:30:00 +0000 (+0800) Subject: platform/x86: thinkpad_acpi: Use kmemdup rather than duplicating its implementation X-Git-Tag: v5.4-rc1~166^2~50 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=35b7c80827e9352b88a2379f06cbb9aa3dd64c14;p=linux.git platform/x86: thinkpad_acpi: Use kmemdup rather than duplicating its implementation 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 Signed-off-by: Andy Shevchenko --- diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 7bde4640ef34..d379bdf98a0f 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -3647,22 +3647,19 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) goto err_exit; /* Set up key map */ - hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, - GFP_KERNEL); - if (!hotkey_keycode_map) { - pr_err("failed to allocate memory for key map\n"); - res = -ENOMEM; - goto err_exit; - } - keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, ARRAY_SIZE(tpacpi_keymap_qtable)); BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, "using keymap number %lu\n", keymap_id); - memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], - TPACPI_HOTKEY_MAP_SIZE); + hotkey_keycode_map = kmemdup(&tpacpi_keymaps[keymap_id], + TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); + if (!hotkey_keycode_map) { + pr_err("failed to allocate memory for key map\n"); + res = -ENOMEM; + goto err_exit; + } input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;