From: Slark Xiao slark_xiao@163.com

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.

Cc: stable@vger.kernel.org # v5.14 + Fixes: 87693e092bd0 ("bus: mhi: pci_generic: Add Cinterion MV31-W PCIe to MHI") Signed-off-by: Slark Xiao slark_xiao@163.com Reviewed-by: Manivannan Sadhasivam mani@kernel.org 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] Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org --- 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[] = {