Message ID | 20170608002447.47580-4-s-anna@ti.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
On 6/7/2017 5:24 PM, Suman Anna wrote: > From: "Andrew F. Davis" <afd@ti.com> > > The DSPs are expected to be in reset when the driver probes a device. > If the DSPs are out of reset in probe, the system may crash when the > firmware is being loaded. So, add a check to make sure the DSP resets > are asserted, and if not, throw a eye-catchy warning and assert the > resets specifically. > > Signed-off-by: Andrew F. Davis <afd@ti.com> > [s-anna@ti.com: replace warning with a WARN] > Signed-off-by: Suman Anna <s-anna@ti.com> > --- Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
diff --git a/drivers/remoteproc/keystone_remoteproc.c b/drivers/remoteproc/keystone_remoteproc.c index 6e09ef76f7c7..5f776bfd674a 100644 --- a/drivers/remoteproc/keystone_remoteproc.c +++ b/drivers/remoteproc/keystone_remoteproc.c @@ -456,6 +456,16 @@ static int keystone_rproc_probe(struct platform_device *pdev) if (of_reserved_mem_device_init(dev)) dev_warn(dev, "device does not have specific CMA pool\n"); + /* ensure the DSP is in reset before loading firmware */ + ret = reset_control_status(ksproc->reset); + if (ret < 0) { + dev_err(dev, "failed to get reset status, status = %d\n", ret); + goto release_mem; + } else if (ret == 0) { + WARN(1, "device is not in reset\n"); + keystone_rproc_dsp_reset(ksproc); + } + ret = rproc_add(rproc); if (ret) { dev_err(dev, "failed to add register device with remoteproc core, status = %d\n",