mhi: pci-generic: Increase number of hardware events

If the IPA (IP hardware accelerator) is starved of event ring elements,
the modem is crashing (SDX55). That can be prevented by setting a
larger number of events (i.e 2 x number of channel ring elements).

Tested with FN980m module.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index f5bee76..d3896ef 100644 (file)
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -91,7 +91,7 @@ struct mhi_pci_dev_info {
 
 #define MHI_EVENT_CONFIG_HW_DATA(ev_ring, ch_num) \
        {                                       \
-               .num_elements = 128,            \
+               .num_elements = 256,            \
                .irq_moderation_ms = 5,         \
                .irq = (ev_ring) + 1,           \
                .priority = 1,                  \