From: Loic Poulain <loic.poulain@linaro.org>
Date: Mon, 4 Jan 2021 16:14:51 +0000 (+0100)
Subject: mhi: pci-generic: Increase number of hardware events
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d9f23ea69d41d9749873381affe3c00bb1857019;p=linux.git

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 f5bee76ea0618..d3896ef13eee4 100644
--- 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,			\