netdev - [PATCH 2/2] net/cdc_ncm: Increase NTB max RX/TX values to 64kb

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Date:   Mon,  4 Jul 2022 09:04:07 +0200
From:   Łukasz Spintzyk <lukasz.spintzyk@...aptics.com>
To:     netdev@...r.kernel.org
Cc:     linux-usb@...r.kernel.org, oliver@...kum.org, kuba@...nel.org,
        ppd-posix@...aptics.com
Subject: [PATCH 2/2] net/cdc_ncm: Increase NTB max RX/TX values to 64kb

DisplayLink ethernet devices require NTB buffers larger then 32kb in order to run with highest performance.

Signed-off-by: Łukasz Spintzyk <lukasz.spintzyk@...aptics.com>
---
 include/linux/usb/cdc_ncm.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h
index f7cb3ddce7fb..2d207cb4837d 100644
--- a/include/linux/usb/cdc_ncm.h
+++ b/include/linux/usb/cdc_ncm.h
@@ -53,8 +53,8 @@
 #define USB_CDC_NCM_NDP32_LENGTH_MIN		0x20
 
 /* Maximum NTB length */
-#define	CDC_NCM_NTB_MAX_SIZE_TX			32768	/* bytes */
-#define	CDC_NCM_NTB_MAX_SIZE_RX			32768	/* bytes */
+#define	CDC_NCM_NTB_MAX_SIZE_TX			65536	/* bytes */
+#define	CDC_NCM_NTB_MAX_SIZE_RX			65536	/* bytes */
 
 /* Initial NTB length */
 #define	CDC_NCM_NTB_DEF_SIZE_TX			16384	/* bytes */
-- 
2.36.1