6.12-stable review patch. If anyone has any objections, please let me know.
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From: Sudeep Holla sudeep.holla@arm.com
[ Upstream commit 2f622a8b0722d332a2a149794a3add47bc9bdcf3 ]
Currently it is assumed that the firmware doesn't present the host partition in the list of partitions presented as part of the response to PARTITION_INFO_GET from the firmware. However, there are few platforms that prefer to present the same in the list of partitions. It is not manadatory but not restricted as well.
So handle the same by making sure to check the presence of the host VM ID in the XArray partition information maintained/managed in the driver before attempting to add it.
Tested-by: Viresh Kumar viresh.kumar@linaro.org Message-Id: 20250217-ffa_updates-v3-7-bd1d9de615e7@arm.com Signed-off-by: Sudeep Holla sudeep.holla@arm.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/arm_ffa/driver.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c index 8dc8654f9f4b2..47751b2c057ae 100644 --- a/drivers/firmware/arm_ffa/driver.c +++ b/drivers/firmware/arm_ffa/driver.c @@ -1449,6 +1449,10 @@ static int ffa_setup_partitions(void)
kfree(pbuf);
+ /* Check if the host is already added as part of partition info */ + if (xa_load(&drv_info->partition_info, drv_info->vm_id)) + return 0; + /* Allocate for the host */ info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) {