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misc: eeprom/idt_89hpesx: Switch to memdup_user_nul() helper

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Use memdup_user_nul() helper instead of open-coding to simplify the code.

Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20230810121608.2110328-1-ruanjinjie@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ruan Jinjie 2023-08-10 20:16:08 +08:00 committed by Greg Kroah-Hartman
parent 25a7de32c8
commit 183238ffb8
1 changed files with 3 additions and 9 deletions
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12
drivers/misc/eeprom/idt_89hpesx.c
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@ -913,15 +913,9 @@ static ssize_t idt_dbgfs_csr_write(struct file *filep, const char __user *ubuf,
return 0;
/* Copy data from User-space */
buf = kmalloc(count + 1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, ubuf, count)) {
ret = -EFAULT;
goto free_buf;
}
buf[count] = 0;
buf = memdup_user_nul(ubuf, count);
if (IS_ERR(buf))
return PTR_ERR(buf);
/* Find position of colon in the buffer */
colon_ch = strnchr(buf, count, ':');