linux-kernel - [PATCH 5.15 161/172] bus: mhi: pci_generic: Add mru

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Date:   Mon, 14 Feb 2022 10:26:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Manivannan Sadhasivam <mani@...nel.org>,
        Slark Xiao <slark_xiao@....com>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 5.15 161/172] bus: mhi: pci_generic: Add mru_default for Foxconn SDX55

From: Slark Xiao <slark_xiao@....com>

commit a0572cea8866230ac13da6358c88075f89e99b20 upstream.

For default mechanism, product would use default MRU 3500 if
they didn't define it. But for Foxconn SDX55, 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/20220119101213.5008-1-slark_xiao@163.com
[mani: Added pci_generic prefix to subject and CCed stable]
Fixes: aac426562f56 ("bus: mhi: pci_generic: Introduce Foxconn T99W175 support")
Cc: stable@...r.kernel.org # v5.12+
Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>
Signed-off-by: Slark Xiao <slark_xiao@....com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Link: https://lore.kernel.org/r/20220205135731.157871-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/bus/mhi/pci_generic.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -366,6 +366,7 @@ static const struct mhi_pci_dev_info mhi
 	.config = &modem_foxconn_sdx55_config,
 	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
 	.dma_data_width = 32,
+	.mru_default = 32768,
 	.sideband_wake = false,
 };