From: Slark Xiao <slark_xiao@xxxxxxx> 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@xxxxxxx [mani: Added pci_generic prefix to subject and CCed stable] Fixes: aac426562f56 ("bus: mhi: pci_generic: Introduce Foxconn T99W175 support") Cc: stable@xxxxxxxxxxxxxxx # v5.12+ Reviewed-by: Manivannan Sadhasivam <mani@xxxxxxxxxx> Signed-off-by: Slark Xiao <slark_xiao@xxxxxxx> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220205135731.157871-2-manivannan.sadhasivam@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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, };
