UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

Revert "usb: dwc3: core: Enable AutoRetry feature in the controller" 

This reverts commit b138e23d3d.

AutoRetry has been found to sometimes cause controller freezes when
communicating with buggy USB devices.

This controller feature allows the controller in host mode to send
non-terminating/burst retry ACKs instead of terminating retry ACKs
to devices when a transaction error (CRC error or overflow) occurs.

Unfortunately, if the USB device continues to respond with a CRC error,
the controller will not complete endpoint-related commands while it
keeps trying to auto-retry. [3] The xHCI driver will notice this once
it tries to abort the transfer using a Stop Endpoint command and
does not receive a completion in time. [1]
This situation is reported to dmesg:

[sda] tag#29 uas_eh_abort_handler 0 uas-tag 1 inflight: CMD IN
[sda] tag#29 CDB: opcode=0x28 28 00 00 69 42 80 00 00 48 00
xhci-hcd: xHCI host not responding to stop endpoint command
xhci-hcd: xHCI host controller not responding, assume dead
xhci-hcd: HC died; cleaning up

Some users observed this problem on an Odroid HC2 with the JMS578
USB3-to-SATA bridge. The issue can be triggered by starting
a read-heavy workload on an attached SSD. After a while, the host
controller would die and the SSD would disappear from the system. [1]

Further analysis by Synopsys determined that controller revisions
other than the one in Odroid HC2 are also affected by this.
The recommended solution was to disable AutoRetry altogether.
This change does not have a noticeable performance impact. [2]

Revert the enablement commit. This will keep the AutoRetry bit in
the default state configured during SoC design [2].

Fixes: b138e23d3d ("usb: dwc3: core: Enable AutoRetry feature in the controller")
Link: https://lore.kernel.org/r/a21f34c04632d250cd0a78c7c6f4a1c9c7a43142.camel@gmail.com/ [1]
Link: https://lore.kernel.org/r/20230711214834.kyr6ulync32d4ktk@synopsys.com/ [2]
Link: https://lore.kernel.org/r/20230712225518.2smu7wse6djc7l5o@synopsys.com/ [3]
Cc: stable@vger.kernel.org
Cc: Mauro Ribeiro <mauro.ribeiro@hardkernel.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Suggested-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Jakub Vanek <linuxtardis@gmail.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230714122419.27741-1-linuxtardis@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jakub Vanek 2023-07-14 14:24:19 +02:00 committed by Greg Kroah-Hartman
parent 5bef4b3cb9
commit 734ae15ab9
2 changed files with 0 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/usb/dwc3/core.c
View File

@ -1209,22 +1209,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
}
if (dwc->dr_mode == USB_DR_MODE_HOST ||
dwc->dr_mode == USB_DR_MODE_OTG) {
reg = dwc3_readl(dwc->regs, DWC3_GUCTL);
/*
* Enable Auto retry Feature to make the controller operating in
* Host mode on seeing transaction errors(CRC errors or internal
* overrun scenerios) on IN transfers to reply to the device
* with a non-terminating retry ACK (i.e, an ACK transcation
* packet with Retry=1 & Nump != 0)
*/
reg |= DWC3_GUCTL_HSTINAUTORETRY;
dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
}
/*
* Must config both number of packets and max burst settings to enable
* RX and/or TX threshold.

3
drivers/usb/dwc3/core.h
View File

@ -256,9 +256,6 @@
#define DWC3_GCTL_GBLHIBERNATIONEN BIT(1)
#define DWC3_GCTL_DSBLCLKGTNG BIT(0)
/* Global User Control Register */
#define DWC3_GUCTL_HSTINAUTORETRY BIT(14)
/* Global User Control 1 Register */
#define DWC3_GUCTL1_DEV_DECOUPLE_L1L2_EVT BIT(31)
#define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS BIT(28)