| Patrick Williams | 2194f50 | 2022-10-16 14:26:09 -0500 | [diff] [blame^] | 1 | Upstream-Status: Inappropriate[Temporary bugfix] |
| 2 | Signed-off-by: Emekcan Aras <emekcan.aras@arm.com> |
| 3 | |
| 4 | From f1a869ea986305a6fb20f3c770c11778a898b86d Mon Sep 17 00:00:00 2001 |
| 5 | From: Emekcan <emekcan.aras@arm.com> |
| 6 | Date: Thu, 13 Oct 2022 20:53:42 +0100 |
| 7 | Subject: [PATCH] Adds workaround for cs1k specific bug |
| 8 | |
| 9 | Adds a temporary workaround to solve a possible |
| 10 | race-conditioning issue in the tee driver |
| 11 | for corstone1000. |
| 12 | |
| 13 | Signed-off-by: Emekcan Aras <emekcan.aras@arm.com> |
| 14 | --- |
| 15 | drivers/firmware/arm_ffa/driver.c | 3 ++- |
| 16 | 1 file changed, 2 insertions(+), 1 deletion(-) |
| 17 | |
| 18 | diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c |
| 19 | index ec731e9e942b..2a3ef649935e 100644 |
| 20 | --- a/drivers/firmware/arm_ffa/driver.c |
| 21 | +++ b/drivers/firmware/arm_ffa/driver.c |
| 22 | @@ -32,6 +32,7 @@ |
| 23 | #include <linux/scatterlist.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/uuid.h> |
| 26 | +#include <linux/delay.h> |
| 27 | |
| 28 | #include "common.h" |
| 29 | |
| 30 | @@ -344,7 +345,7 @@ static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool mode_32bit, |
| 31 | { |
| 32 | u32 req_id, resp_id, src_dst_ids = PACK_TARGET_INFO(src_id, dst_id); |
| 33 | ffa_value_t ret; |
| 34 | - |
| 35 | + msleep(1); |
| 36 | if (mode_32bit) { |
| 37 | req_id = FFA_MSG_SEND_DIRECT_REQ; |
| 38 | resp_id = FFA_MSG_SEND_DIRECT_RESP; |
| 39 | -- |
| 40 | 2.17.1 |
| 41 | |