diff options
| author | Dan Streetman <ddstreet@ieee.org> | 2005-07-29 19:18:28 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-07-29 20:12:54 (GMT) |
| commit | 498f78e6fcf558d0dec31f5648f43426ae16433f (patch) | |
| tree | 8f07affd9ffd2324e5dcfa665aed8cb68e0ef88d /drivers/usb | |
| parent | 6b216df87cb5f3bb7d47a33f1cd955ebc7b84dfd (diff) | |
| download | linux-498f78e6fcf558d0dec31f5648f43426ae16433f.tar.xz | |
[PATCH] USB: fix in usb_calc_bus_time
This patch does the same swap, i.e. use the ISO macro if (isoc).
Additionally, it fixes the return value - the usb_calc_bus_time function
returns the time in nanoseconds (I didn't notice that before) while the
HS_USECS and HS_USECS_ISO are microseconds. This fixes the function to
return nanoseconds always, and adjusts ehci-q.c (the only high-speed
caller of the function) to wrap the call in NS_TO_US().
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hcd.c | 4 | ||||
| -rw-r--r-- | drivers/usb/core/hcd.h | 8 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-q.c | 4 |
3 files changed, 9 insertions, 7 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 8616356..79422a3 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -939,9 +939,9 @@ long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) case USB_SPEED_HIGH: /* ISOC or INTR */ // FIXME adjust for input vs output if (isoc) - tmp = HS_USECS (bytecount); + tmp = HS_NSECS_ISO (bytecount); else - tmp = HS_USECS_ISO (bytecount); + tmp = HS_NSECS (bytecount); return tmp; default: pr_debug ("%s: bogus device speed!\n", usbcore_name); diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h index 67db4a9..28055f9 100644 --- a/drivers/usb/core/hcd.h +++ b/drivers/usb/core/hcd.h @@ -334,17 +334,19 @@ extern void usb_release_bandwidth (struct usb_device *dev, struct urb *urb, extern int usb_check_bandwidth (struct usb_device *dev, struct urb *urb); /* - * Ceiling microseconds (typical) for that many bytes at high speed + * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed * to preallocate bandwidth) */ #define USB2_HOST_DELAY 5 /* nsec, guess */ -#define HS_USECS(bytes) NS_TO_US ( ((55 * 8 * 2083)/1000) \ +#define HS_NSECS(bytes) ( ((55 * 8 * 2083)/1000) \ + ((2083UL * (3167 + BitTime (bytes)))/1000) \ + USB2_HOST_DELAY) -#define HS_USECS_ISO(bytes) NS_TO_US ( ((38 * 8 * 2083)/1000) \ +#define HS_NSECS_ISO(bytes) ( ((38 * 8 * 2083)/1000) \ + ((2083UL * (3167 + BitTime (bytes)))/1000) \ + USB2_HOST_DELAY) +#define HS_USECS(bytes) NS_TO_US (HS_NSECS(bytes)) +#define HS_USECS_ISO(bytes) NS_TO_US (HS_NSECS_ISO(bytes)) extern long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount); diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index d74b2d6..4f97a4a 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -657,8 +657,8 @@ qh_make ( * For control/bulk requests, the HC or TT handles these. */ if (type == PIPE_INTERRUPT) { - qh->usecs = usb_calc_bus_time (USB_SPEED_HIGH, is_input, 0, - hb_mult (maxp) * max_packet (maxp)); + qh->usecs = NS_TO_US (usb_calc_bus_time (USB_SPEED_HIGH, is_input, 0, + hb_mult (maxp) * max_packet (maxp))); qh->start = NO_FRAME; if (urb->dev->speed == USB_SPEED_HIGH) { |