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Add more sanity checks for USB_HOST_ALIGN input values. Re-factor existing

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checks for readability.

Approved by:	thompsa (mentor)
This commit is contained in:
hselasky 2011-01-24 17:38:37 +00:00
parent aec2294356
commit d0e4831ad1
1 changed files with 6 additions and 3 deletions
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9
sys/dev/usb/usb_freebsd.h
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@ -46,12 +46,15 @@
#define USB_TD_GET_PROC(td) (td)->td_proc
#define USB_PROC_GET_GID(td) (td)->p_pgid
#if defined(USB_HOST_ALIGN) && (USB_HOST_ALIGN != 0)
/* USB_HOST_ALIGN is already defined and valid */
#else
#if (!defined(USB_HOST_ALIGN)) || (USB_HOST_ALIGN <= 0)
/* Use default value. */
#undef USB_HOST_ALIGN
#define USB_HOST_ALIGN 8 /* bytes, must be power of two */
#endif
/* Sanity check for USB_HOST_ALIGN: Verify power of two. */
#if ((-USB_HOST_ALIGN) & USB_HOST_ALIGN) != USB_HOST_ALIGN
#error "USB_HOST_ALIGN is not power of two."
#endif
#define USB_FS_ISOC_UFRAME_MAX 4 /* exclusive unit */
#define USB_BUS_MAX 256 /* units */
#define USB_MAX_DEVICES 128 /* units */