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cm4000_cs.c cmm_ioctl(): get rid of pointless access_ok() 

copy_to_user()/copy_from_user() for everything

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
alistair/sunxi64-5.8
Al Viro 2020-04-22 22:52:07 -04:00
parent 558cc8f782
commit 5f599098f7
1 changed files with 0 additions and 14 deletions
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14
drivers/char/pcmcia/cm4000_cs.c
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@ -1404,7 +1404,6 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
unsigned int iobase = dev->p_dev->resource[0]->start;
struct inode *inode = file_inode(filp);
struct pcmcia_device *link;
int size;
int rc;
void __user *argp = (void __user *)arg;
#ifdef CM4000_DEBUG
@ -1441,19 +1440,6 @@ static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
DEBUGP(4, dev, "iocnr mismatch\n");
goto out;
}
size = _IOC_SIZE(cmd);
rc = -EFAULT;
DEBUGP(4, dev, "iocdir=%.4x iocr=%.4x iocw=%.4x iocsize=%d cmd=%.4x\n",
_IOC_DIR(cmd), _IOC_READ, _IOC_WRITE, size, cmd);
if (_IOC_DIR(cmd) & _IOC_READ) {
if (!access_ok(argp, size))
goto out;
}
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (!access_ok(argp, size))
goto out;
}
rc = 0;
switch (cmd) {