diff options
| author | Laurentiu Tudor <laurentiu.tudor@nxp.com> | 2021-07-15 17:07:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-21 13:56:25 +0200 |
| commit | 39243fc1110caf1e76ea647059e061a021680dfd (patch) | |
| tree | 5d331e2faa24739d913f75344222727769f2b4d4 /drivers/bus | |
| parent | 8c97a4fc1b34856812b6775f1f1d46b3bf59bc9d (diff) | |
bus: fsl-mc: pause the MC firmware when unloading
Pause the MC firmware when unloading the driver so that it doesn't
crash in certain scenarios, such as kexec.
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Link: https://lore.kernel.org/r/20210715140718.8513-6-laurentiu.tudor@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-bus.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 41861ca5c8f1..e5b4830cf3c5 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -1207,6 +1207,16 @@ static int fsl_mc_bus_remove(struct platform_device *pdev) bus_unregister_notifier(&fsl_mc_bus_type, &fsl_mc_nb); + if (mc->fsl_mc_regs) { + /* + * Pause the MC firmware so that it doesn't crash in certain + * scenarios, such as kexec. + */ + writel(readl(mc->fsl_mc_regs + FSL_MC_GCR1) | + (GCR1_P1_STOP | GCR1_P2_STOP), + mc->fsl_mc_regs + FSL_MC_GCR1); + } + return 0; } |