genirq/msi: Take the per-device MSI lock before validating the control structure
BugLink: https://bugs.launchpad.net/bugs/2011425
commit
0af2795f936f1ea1f9f1497447145dfcc7ed2823 upstream.
Calling msi_ctrl_valid() ultimately results in calling
msi_get_device_domain(), which requires holding the device MSI lock.
However, in msi_domain_populate_irqs() the lock is taken right after having
called msi_ctrl_valid(), which is just a tad too late.
Take the lock before invoking msi_ctrl_valid().
Fixes: 40742716f294 ("genirq/msi: Make msi_add_simple_msi_descs() device domain aware")
Reported-by: "Russell King (Oracle)" <linux@armlinux.org.uk>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/Y/Opu6ETe3ZzZ/8E@shell.armlinux.org.uk
Link: https://lore.kernel.org/r/20230220190101.314446-1-maz@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>