Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c06d4dcf5034ee2289a921b9b2c547f3fed2d878
Commit: c06d4dcf5034ee2289a921b9b2c547f3fed2d878
Parent: cd4cdc93ce04b562412df6c0cf25c564ab2522ac
Author: David Brownell <[EMAIL PROTECTED]>
AuthorDate: Thu Jan 24 12:30:34 2008 -0800
Committer: Greg Kroah-Hartman <[EMAIL PROTECTED]>
CommitDate: Fri Feb 1 14:35:06 2008 -0800
usb: ehci should use u16 for isochronous intervals
While most isochronous endpoints have short polling intervals, the
EHCI driver won't necessarily handle larger ones correctly.
This patch switches to use a "u16" to represent those periods, not
a u8, since it can always work: the largest expressible period
is 2^15 units ... not the previous too-short limit of 128 frames
(full or low speeds) or microframes (high speed, 32 frames).
This bug is essentially theoretical, since the few ISO endpoints
I've seen which don't use one transfer per frame are high speed
ones using more than that (including high bandwidth, 24 KB/msec).
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
drivers/usb/host/ehci.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 42969e9..bf92d20 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -550,8 +550,8 @@ struct ehci_iso_stream {
* trusting urb->interval == f(epdesc->bInterval) and
* including the extra info for hw_bufp[0..2]
*/
- u8 interval;
u8 usecs, c_usecs;
+ u16 interval;
u16 tt_usecs;
u16 maxp;
u16 raw_mask;
-
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