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firmware: arm_ffa: Tear down driver during shutdown

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The platform core invokes a driver's shutdown callback, rather than its
remove callback, while preparing devices for a normal kexec. Without a
shutdown callback, the FF-A driver leaves notifications, partition devices,
and the RX/TX mapping active before the replacement kernel is booted.

Use ffa_remove() for shutdown so the existing cleanup runs before a normal
kexec and other orderly system shutdowns.

Reported-by: Nat Gurumoorthy <natg@google.com>
Closes: https://lore.kernel.org/all/20260729162731.1383875-1-natg@google.com/
Reported-by: Carol L Soto <csoto@nvidia.com>
Closes: https://lore.kernel.org/all/20260818224404.3694580-1-csoto@nvidia.com
Reported-by: Maxi Saparov <masaparov@coreweave.com>
Closes: https://lore.kernel.org/all/20260826222337.73480-1-maxi.saparov@gmail.com
Link: https://patch.msgid.link/20260901131112.3437516-1-sudeep.holla@kernel.org
Tested-by: Carol L Soto <csoto@nvidia.com>
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
This commit is contained in:
Sudeep Holla 2026-09-01 14:11:12 +01:00
parent cee9395acd
commit 3bb3e80faf
1 changed files with 1 additions and 0 deletions
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1
drivers/firmware/arm_ffa/driver.c
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@ -2225,6 +2225,7 @@ static void ffa_remove(struct platform_device *pdev)
static struct platform_driver ffa_driver = {
.probe = ffa_probe,
.remove = ffa_remove,
.shutdown = ffa_remove,
.driver = {
.name = FFA_PLATFORM_NAME,
},