diff --git a/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0006-Adds-workaround-for-cs1k-specific-bug.patch b/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0006-Adds-workaround-for-cs1k-specific-bug.patch new file mode 100644 index 00000000..5cd8e4b0 --- /dev/null +++ b/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0006-Adds-workaround-for-cs1k-specific-bug.patch @@ -0,0 +1,41 @@ +Upstream-Status: Inappropriate[Temporary bugfix] +Signed-off-by: Emekcan Aras + +From f1a869ea986305a6fb20f3c770c11778a898b86d Mon Sep 17 00:00:00 2001 +From: Emekcan +Date: Thu, 13 Oct 2022 20:53:42 +0100 +Subject: [PATCH] Adds workaround for cs1k specific bug + +Adds a temporary workaround to solve a possible +race-conditioning issue in the tee driver +for corstone1000. + +Signed-off-by: Emekcan Aras +--- + drivers/firmware/arm_ffa/driver.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c +index ec731e9e942b..2a3ef649935e 100644 +--- a/drivers/firmware/arm_ffa/driver.c ++++ b/drivers/firmware/arm_ffa/driver.c +@@ -32,6 +32,7 @@ + #include + #include + #include ++#include + + #include "common.h" + +@@ -344,7 +345,7 @@ static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool mode_32bit, + { + u32 req_id, resp_id, src_dst_ids = PACK_TARGET_INFO(src_id, dst_id); + ffa_value_t ret; +- ++ msleep(1); + if (mode_32bit) { + req_id = FFA_MSG_SEND_DIRECT_REQ; + resp_id = FFA_MSG_SEND_DIRECT_RESP; +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc b/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc index d0740bcd..34a40907 100644 --- a/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc +++ b/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc @@ -49,6 +49,7 @@ SRC_URI:append:corstone1000 = " \ file://0003-Add-rpmsg-driver-for-corstone1000.patch \ file://0004-rpmsg-arm-fix-return-value.patch \ file://0005-rpmsg-arm-update-chrdev-to-ctrldev-registration.patch \ + file://0006-Adds-workaround-for-cs1k-specific-bug.patch \ " SRC_URI:append:corstone1000 = " ${@bb.utils.contains('MACHINE_FEATURES', \