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USB: usbmon: use simple_read_from_buffer()
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Pete Zaitcev <zaitcev@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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1 changed files with 2 additions and 12 deletions
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@ -9,6 +9,7 @@
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#include <linux/kernel.h>
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#include <linux/usb.h>
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#include <linux/fs.h>
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#include <asm/uaccess.h>
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#include "usb_mon.h"
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@ -42,19 +43,8 @@ static ssize_t mon_stat_read(struct file *file, char __user *buf,
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size_t nbytes, loff_t *ppos)
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{
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struct snap *sp = file->private_data;
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loff_t pos = *ppos;
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int cnt;
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if (pos < 0 || pos >= sp->slen)
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return 0;
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if (nbytes == 0)
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return 0;
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if ((cnt = sp->slen - pos) > nbytes)
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cnt = nbytes;
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if (copy_to_user(buf, sp->str + pos, cnt))
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return -EFAULT;
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*ppos = pos + cnt;
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return cnt;
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return simple_read_from_buffer(buf, nbytes, ppos, sp->str, sp->slen);
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}
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static int mon_stat_release(struct inode *inode, struct file *file)
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