linux-kernel - [PATCH] uas: Add US_FL_NO_ATA_1X for linux tcm_usb

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Date:   Mon, 7 Aug 2023 17:50:25 +0530
From:   Piyush Mehta <piyush.mehta@....com>
To:     <stern@...land.harvard.edu>, <gregkh@...uxfoundation.org>
CC:     <michal.simek@....com>, <siva.durga.prasad.paladugu@....com>,
        <radhey.shyam.pandey@....com>, <git@....com>,
        <linux-usb@...r.kernel.org>,
        <usb-storage@...ts.one-eyed-alien.net>,
        <linux-kernel@...r.kernel.org>, Piyush Mehta <piyush.mehta@....com>
Subject: [PATCH] uas: Add US_FL_NO_ATA_1X for linux tcm_usb_gadget

The linux kernel's tcm_usb_gadget requires the US_FL_NO_ATA_1X quirk.
It does not respond to the ATA_12 family of commands and hangs. The host
prevents the issuing of ATA_12 commands to the TCM module, by introducing
this quirk, the host is permitted to proceed with other operations.

Signed-off-by: Piyush Mehta <piyush.mehta@....com>
---
 drivers/usb/storage/unusual_uas.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h
index 1f8c9b16a0fb..2fc0220c72ee 100644
--- a/drivers/usb/storage/unusual_uas.h
+++ b/drivers/usb/storage/unusual_uas.h
@@ -177,6 +177,13 @@ UNUSUAL_DEV(0x4971, 0x8017, 0x0000, 0x9999,
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_NO_REPORT_OPCODES),
 
+/* Reported-by: Piyush Mehta <piyush.mehta@....com> */
+UNUSUAL_DEV(0x0525, 0xa4a5, 0x0000, 0x9999,
+		"NetChip",
+		"Target Product",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_NO_ATA_1X),
+
 /* "G-DRIVE" external HDD hangs on write without these.
  * Patch submitted by Alexander Kappner <agk@...king.net>
  */
-- 
2.25.1