linux-kernel - Re: [PATCH v2] Revert "usb: dwc3: gadget: Prevent EP queuing while stopping transfers"

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Message-ID: <YGXVMzwXXXFKfbuI@kroah.com>
Date:   Thu, 1 Apr 2021 16:14:11 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Martin Kepplinger <martin.kepplinger@...i.sm>
Cc:     balbi@...nel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, linux-usb@...r.kernel.org,
        wcheng@...eaurora.org
Subject: Re: [PATCH v2] Revert "usb: dwc3: gadget: Prevent EP queuing while
 stopping transfers"

On Thu, Apr 01, 2021 at 03:11:08PM +0200, Martin Kepplinger wrote:
> commit 9de499997c ("usb: dwc3: gadget: Prevent EP queuing while stopping
> transfers") results in the below error every time I connect the type-c
> connector to the dwc3, configured with serial and ethernet gadgets.
> I also apply the following to dwc3 on this port:
> 
> dr_mode = "otg";                                                        
> snps,dis_u3_susphy_quirk;                                               
> hnp-disable;                                                            
> srp-disable;                                                            
> adp-disable;                                                            

Why all the trailing whitespace?

> usb-role-switch;
> 
> [   51.148220] ------------[ cut here ]------------
> [   51.148241] dwc3 38100000.usb: No resource for ep2in
> [   51.148376] WARNING: CPU: 0 PID: 299 at drivers/usb/dwc3/gadget.c:360 dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3]
> [   51.148837] CPU: 0 PID: 299 Comm: irq/64-dwc3 Not tainted 5.11.11-librem5-00334-ge4c4ff3624e9 #218
> [   51.148848] Hardware name: Purism Librem 5r4 (DT)
> [   51.148854] pstate: 60000085 (nZCv daIf -PAN -UAO -TCO BTYPE=--)
> [   51.148863] pc : dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3]
> [   51.148894] lr : dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3]
> [   51.148924] sp : ffff800011cb3ac0
> [   51.148929] x29: ffff800011cb3ac0 x28: ffff0000032a7b00 
> [   51.148942] x27: ffff00000327da00 x26: 0000000000000000 
> [   51.148954] x25: 00000000ffffffea x24: 0000000000000006 
> [   51.148967] x23: ffff0000bee1c080 x22: ffff800011cb3b7c 
> [   51.148979] x21: 0000000000000406 x20: ffff0000bf170000 
> [   51.148992] x19: 0000000000000001 x18: 0000000000000000 
> [   51.149004] x17: 0000000000000000 x16: 0000000000000000 
> [   51.149016] x15: 0000000000000000 x14: ffff8000114512c0 
> [   51.149028] x13: 0000000000001698 x12: 0000000000000040 
> [   51.149040] x11: ffff80001151a6f8 x10: 00000000ffffe000 
> [   51.149052] x9 : ffff8000100b2b7c x8 : ffff80001146a6f8 
> [   51.149065] x7 : ffff80001151a6f8 x6 : 0000000000000000 
> [   51.149077] x5 : ffff0000bf939948 x4 : 0000000000000000 
> [   51.149089] x3 : 0000000000000027 x2 : 0000000000000000 
> [   51.149101] x1 : 0000000000000000 x0 : ffff0000049ae040 
> [   51.149114] Call trace:
> [   51.149120]  dwc3_send_gadget_ep_cmd+0x570/0x740 [dwc3]
> [   51.149150]  __dwc3_gadget_ep_enable+0x288/0x4fc [dwc3]
> [   51.149179]  dwc3_gadget_ep_enable+0x6c/0x15c [dwc3]
> [   51.149209]  usb_ep_enable+0x48/0x110 [udc_core]
> [   51.149251]  rndis_set_alt+0x138/0x1c0 [usb_f_rndis]
> [   51.149276]  composite_setup+0x674/0x194c [libcomposite]
> [   51.149314]  dwc3_ep0_interrupt+0x9c4/0xb9c [dwc3]
> [   51.149344]  dwc3_thread_interrupt+0x8bc/0xe74 [dwc3]
> [   51.149374]  irq_thread_fn+0x38/0xb0
> [   51.149388]  irq_thread+0x170/0x294
> [   51.149397]  kthread+0x164/0x16c
> [   51.149407]  ret_from_fork+0x10/0x34
> [   51.149419] ---[ end trace 62c6cc2ebfb18047 ]---
> 
> Linus' tree isn't affected. Revert the change.

What does this mean?

> 
> Signed-off-by: Martin Kepplinger <martin.kepplinger@...i.sm>
> 
> ---

What changed from v1?  Always put that below the --- line.

And as this is a revert, is a "Fixes:" line also relevant?

thanks,

greg k-h