From 05daa805a86c831ad9692f6f15e1b877c8f10638 Mon Sep 17 00:00:00 2001
From: Slark Xiao <slark_xiao@163.com>
Date: Sat, 5 Feb 2022 19:27:31 +0530
Subject: [PATCH] bus: mhi: pci_generic: Add mru_default for Cinterion MV31-W
Git-commit: 05daa805a86c831ad9692f6f15e1b877c8f10638
Patch-mainline: v5.17-rc4
References: bsc#1206451

For default mechanism, product would use default MRU 3500 if
they didn't define it. But for Cinterion MV31-W, there is a known
issue which MRU 3500 would lead to data connection lost.
So we align it with Qualcomm default MRU settings.

Link: https://lore.kernel.org/r/20220119102519.5342-1-slark_xiao@163.com
[mani: Modified the commit message to reflect Cinterion MV31-W and CCed stable]
Fixes: 87693e092bd0 ("bus: mhi: pci_generic: Add Cinterion MV31-W PCIe to MHI")
Cc: stable@vger.kernel.org # v5.14 +
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Slark Xiao <slark_xiao@163.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220205135731.157871-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/bus/mhi/pci_generic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index 74e8fc342cfd..b79895810c52 100644
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -402,6 +402,7 @@ static const struct mhi_pci_dev_info mhi_mv31_info = {
 	.config = &modem_mv31_config,
 	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
 	.dma_data_width = 32,
+	.mru_default = 32768,
 };
 
 static const struct mhi_channel_config mhi_sierra_em919x_channels[] = {
-- 
2.35.3