mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-12 13:55:32 +00:00
Code Issues Releases Wiki Activity

usb: musb: host: Fix SuperSpeed hub enumeration

Browse source 
Disables PING on status phase of control transfer.
PING token is not mandatory in status phase of control transfer
and so some high speed USB devices don't support it. If such devices
are connected to MUSB then they would not respond to PING token
causing delayed or failed enumeration.

[Roger Q] Fixes enumeration issues with some Super-Speed USB hubs
e.g. Dlink DUB-1340

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Ajay Kumar Gupta 2014-02-04 15:28:06 +02:00 committed by Felipe Balbi
parent 30a70b026b
commit 3c4653c1f6
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
drivers/usb/musb/musb_host.c
View file

@ -1183,6 +1183,9 @@ irqreturn_t musb_h_ep0_irq(struct musb *musb)
csr = MUSB_CSR0_H_STATUSPKT
| MUSB_CSR0_TXPKTRDY;
/* disable ping token in status phase */
csr |= MUSB_CSR0_H_DIS_PING;
/* flag status stage */
musb->ep0_stage = MUSB_EP0_STATUS;