From: Slark Xiao <slark_xiao@xxxxxxx> commit 05daa805a86c831ad9692f6f15e1b877c8f10638 upstream. 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@xxxxxxx [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@xxxxxxxxxxxxxxx # v5.14 + 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/20220205135731.157871-3-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 @@ -402,6 +402,7 @@ static const struct mhi_pci_dev_info mhi .config = &modem_mv31_config, .bar_num = MHI_PCI_DEFAULT_BAR_NUM, .dma_data_width = 32, + .mru_default = 32768, }; static const struct pci_device_id mhi_pci_id_table[] = {
