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authorAlan Stern <stern@rowland.harvard.edu>2013-10-11 11:28:21 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-11 16:37:46 -0700
commit2b90f01b219e390e1f1bf68dd7a2333efb3e3eff (patch)
tree77d664254c0376ea68850e86ba6c2df5aa1dabfd /drivers/usb/host/ehci-sched.c
parente24371a6be9c5c00b56607bd425cc409cba75d88 (diff)
downloadlinux-stericsson-2b90f01b219e390e1f1bf68dd7a2333efb3e3eff.tar.gz
USB: EHCI: compute full-speed bandwidth usage correctly
Although the bandwidth statistics maintained by ehci-hcd show up only in the /sys/kernel/debug/usb/devices file, they ought to be calculated correctly. The calculation for full-speed isochronous endpoints is wrong; it mistakenly yields bytes per microframe instead of bytes per frame. The "interval" value, which is in frames, should not be converted to microframes. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/ehci-sched.c')
-rw-r--r--drivers/usb/host/ehci-sched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 34b5945fafa5..4b0903c6c616 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -1055,7 +1055,7 @@ iso_stream_init (
} else
stream->raw_mask = smask_out [hs_transfers - 1];
bandwidth = stream->usecs + stream->c_usecs;
- bandwidth /= interval << 3;
+ bandwidth /= interval;
/* stream->splits gets created from raw_mask later */
stream->address = cpu_to_hc32(ehci, addr);