uhci-debug.c (ecd740c6f2f092b90b95fa35f757973589eaaca2) uhci-debug.c (b25472f9b96159cc0b9b7ed449448805973cd789)
1/*
2 * UHCI-specific debugging code. Invaluable when something
3 * goes wrong, but don't get in my face.
4 *
5 * Kernel visible pointers are surrounded in []s and bus
6 * visible pointers are surrounded in ()s
7 *
8 * (C) Copyright 1999 Linus Torvalds

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579
580 file->private_data = up;
581
582 return 0;
583}
584
585static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
586{
1/*
2 * UHCI-specific debugging code. Invaluable when something
3 * goes wrong, but don't get in my face.
4 *
5 * Kernel visible pointers are surrounded in []s and bus
6 * visible pointers are surrounded in ()s
7 *
8 * (C) Copyright 1999 Linus Torvalds

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579
580 file->private_data = up;
581
582 return 0;
583}
584
585static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
586{
587 struct uhci_debug *up;
588 loff_t new = -1;
589
590 up = file->private_data;
591
592 /*
593 * XXX: atomic 64bit seek access, but that needs to be fixed in the VFS
594 */
595 switch (whence) {
596 case 0:
597 new = off;
598 break;
599 case 1:
600 new = file->f_pos + off;
601 break;
602 }
603
604 if (new < 0 || new > up->size)
605 return -EINVAL;
606
607 return (file->f_pos = new);
587 struct uhci_debug *up = file->private_data;
588 return no_seek_end_llseek_size(file, off, whence, up->size);
608}
609
610static ssize_t uhci_debug_read(struct file *file, char __user *buf,
611 size_t nbytes, loff_t *ppos)
612{
613 struct uhci_debug *up = file->private_data;
614 return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
615}

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590
591static ssize_t uhci_debug_read(struct file *file, char __user *buf,
592 size_t nbytes, loff_t *ppos)
593{
594 struct uhci_debug *up = file->private_data;
595 return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
596}

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