From f992b15965177e2f280fb6f41f292214f9a6f8d5 Mon Sep 17 00:00:00 2001
From: Pavan Chebbi <pavan.chebbi@broadcom.com>
Date: Tue, 10 Dec 2024 03:28:31 -0800
Subject: [PATCH] tg3: Fix DMA allocations on 57766 devices

The coherent DMA mask of 31b may not be accepted if
the DMA mask is configured to use higher memories of
64b. Set the DMA mask also to lower 32b for 57766
devices.

Fixes: 614f4d166eee ("tg3: Set coherent DMA mask bits to 31 for BCM57766 chipsets")
Reported-By: Rui Salvaterra <rsalvaterra@gmail.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
---
 drivers/net/ethernet/broadcom/tg3.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -17799,8 +17799,10 @@ static int tg3_init_one(struct pci_dev *
 	} else
 		persist_dma_mask = dma_mask = DMA_BIT_MASK(64);
 
-	if (tg3_asic_rev(tp) == ASIC_REV_57766)
+	if (tg3_asic_rev(tp) == ASIC_REV_57766) {
+		dma_mask = DMA_BIT_MASK(32);
 		persist_dma_mask = DMA_BIT_MASK(31);
+	}
 
 	/* Configure DMA attributes. */
 	if (dma_mask > DMA_BIT_MASK(32)) {
