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mailbox: zynqmp-ipi: Remove dev.parent check in zynqmp_ipi_free_mboxes

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[ Upstream commit 019e3f4550 ]

The ipi_mbox->dev.parent check is unreliable proxy for registration
status as it fails to protect against probe failures that occur after
the parent is assigned but before device_register() completes.

device_is_registered() is the canonical and robust method to verify the
registration status.

Remove ipi_mbox->dev.parent check in zynqmp_ipi_free_mboxes().

Fixes: 4981b82ba2 ("mailbox: ZynqMP IPI mailbox controller")
Signed-off-by: Harini T <harini.t@amd.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Harini T
2025-09-29 13:07:21 +05:30
committed by Greg Kroah-Hartman
parent ddd9c81a1b
commit 91bbee4e6d
1 changed files with 2 additions and 4 deletions
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6
drivers/mailbox/zynqmp-ipi-mailbox.c
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@@ -893,10 +893,8 @@ static void zynqmp_ipi_free_mboxes(struct zynqmp_ipi_pdata *pdata)
i = pdata->num_mboxes;
for (; i >= 0; i--) {
ipi_mbox = &pdata->ipi_mboxes[i];
if (ipi_mbox->dev.parent) {
if (device_is_registered(&ipi_mbox->dev))
device_unregister(&ipi_mbox->dev);
}
if (device_is_registered(&ipi_mbox->dev))
device_unregister(&ipi_mbox->dev);
}
}