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optee: fix tee out of memory failure seen during kexec reboot 

The following out of memory errors are seen on kexec reboot
from the optee core.

[    0.368428] tee_bnxt_fw optee-clnt0: tee_shm_alloc failed
[    0.368461] tee_bnxt_fw: probe of optee-clnt0 failed with error -22

tee_shm_release() is not invoked on dma shm buffer.

Implement .shutdown() method to handle the release of the buffers
correctly.

More info:
https://github.com/OP-TEE/optee_os/issues/3637

Cc: stable@vger.kernel.org
Signed-off-by: Allen Pais <apais@linux.microsoft.com>
Reviewed-by: Tyler Hicks <tyhicks@linux.microsoft.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Allen Pais 2021-06-14 17:33:12 -05:00 committed by Jens Wiklander
parent adf752af45
commit f25889f931
1 changed files with 20 additions and 0 deletions
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20
drivers/tee/optee/core.c
View File

@ -573,6 +573,13 @@ static optee_invoke_fn *get_invoke_func(struct device *dev)
return ERR_PTR(-EINVAL);
}
/* optee_remove - Device Removal Routine
* @pdev: platform device information struct
*
* optee_remove is called by platform subsystem to alert the driver
* that it should release the device
*/
static int optee_remove(struct platform_device *pdev)
{
struct optee *optee = platform_get_drvdata(pdev);
@ -603,6 +610,18 @@ static int optee_remove(struct platform_device *pdev)
return 0;
}
/* optee_shutdown - Device Removal Routine
* @pdev: platform device information struct
*
* platform_shutdown is called by the platform subsystem to alert
* the driver that a shutdown, reboot, or kexec is happening and
* device must be disabled.
*/
static void optee_shutdown(struct platform_device *pdev)
{
optee_disable_shm_cache(platform_get_drvdata(pdev));
}
static int optee_probe(struct platform_device *pdev)
{
optee_invoke_fn *invoke_fn;
@ -739,6 +758,7 @@ MODULE_DEVICE_TABLE(of, optee_dt_match);
static struct platform_driver optee_driver = {
.probe = optee_probe,
.remove = optee_remove,
.shutdown = optee_shutdown,
.driver = {
.name = "optee",
.of_match_table = optee_dt_match,