From 08ea2419b380b1b36ca4d8c99c24a9518eeff6cc Mon Sep 17 00:00:00 2001 From: Etienne Carriere Date: Thu, 8 Oct 2020 16:37:21 +0200 Subject: [PATCH] UPSTREAM: firmware: arm_scmi: Expand SMC/HVC message pool to more than one SMC/HVC can transmit only one message at the time as the shared memory needs to be protected and the calls are synchronous. However, in order to allow multiple threads to send SCMI messages simultaneously, we need a larger poll of memory. Let us just use value of 20 to keep it in sync mailbox transport implementation. Any other value must work perfectly. Link: https://lore.kernel.org/r/20201008143722.21888-4-etienne.carriere@linaro.org Fixes: 1dc6558062da ("firmware: arm_scmi: Add smc/hvc transport") Cc: Peng Fan Signed-off-by: Etienne Carriere [sudeep.holla: reworded the commit message to indicate the practicality] Signed-off-by: Sudeep Holla (cherry picked from commit 7adb2c8aaaa6a387af7140e57004beba2c04a4c6) Change-Id: I36bf5833a51c7e31f822a1eac504db28519219a3 Signed-off-by: XiaoDong Huang --- drivers/firmware/arm_scmi/smc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scmi/smc.c b/drivers/firmware/arm_scmi/smc.c index a1537d123e38..22f83af6853a 100644 --- a/drivers/firmware/arm_scmi/smc.c +++ b/drivers/firmware/arm_scmi/smc.c @@ -149,6 +149,6 @@ static struct scmi_transport_ops scmi_smc_ops = { const struct scmi_desc scmi_smc_desc = { .ops = &scmi_smc_ops, .max_rx_timeout_ms = 30, - .max_msg = 1, + .max_msg = 20, .max_msg_size = 128, };