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authorBin Liu <b-liu@ti.com>2016-04-25 22:53:30 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-04-26 23:50:02 +0200
commitf551e13529833e052f75ec628a8af7b034af20f9 (patch)
tree3cf30098141b9c961db96ac5b06b2d3c7138f452 /drivers/usb
parentusb: musb: gadget: nuke endpoint before setting its descriptor to NULL (diff)
downloadlinux-f551e13529833e052f75ec628a8af7b034af20f9.tar.xz
linux-f551e13529833e052f75ec628a8af7b034af20f9.zip
Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half"
This reverts commit 2035772010db634ec8566b658fb1cd87ec47ac77. Commit 20357720 claims throughput improvement for MSC/UVC, but I don't see much improvement. Following are the MSC measurement using dd on AM335x GP EVM. with BCD_BH: read: 14.9MB/s, write: 20.9MB/s without BCD_BH: read: 15.2MB/s, write: 21.2MB/s However with this commit the following regressions have been observed. 1. ASIX usb-ethernet dongle is completely broken on UDP RX. 2. Unpluging a 3G modem, which uses option driver, behind a hub causes console log flooding with the following message. option_instat_callback: error -71 Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/musb/musb_host.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 58487a473521..2f8ad7f1f482 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -2735,7 +2735,7 @@ static const struct hc_driver musb_hc_driver = {
.description = "musb-hcd",
.product_desc = "MUSB HDRC host driver",
.hcd_priv_size = sizeof(struct musb *),
- .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
+ .flags = HCD_USB2 | HCD_MEMORY,
/* not using irq handler or reset hooks from usbcore, since
* those must be shared with peripheral code for OTG configs