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Fix count calculation for user copy in fops.c #18

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Fix count calculation for user copy in fops.c #18

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4 changes: 2 additions & 2 deletions eg_03_scull_basic/fops.c
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Original file line number Diff line number Diff line change
Expand Up @@ -69,8 +69,8 @@ ssize_t scull_read(struct file *filp, char __user *buff, size_t count,
goto end_of_file;
}

if (count > pblock->offset)
count = pblock->offset;
if (count > pblock->offset - toffset)
count = pblock->offset - toffset;

if (copy_to_user(buff, pblock->data, count)) {
retval = -EFAULT;
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