Messages in this thread Patch in this message | | | From | MD Danish Anwar <> | Subject | [PATCH v7 3/5] remoteproc: pru: Make sysfs entries read-only for PRU client driven boots | Date | Mon, 31 Oct 2022 13:07:59 +0530 |
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From: Suman Anna <s-anna@ti.com>
The PRU remoteproc driver is not configured for 'auto-boot' by default, and allows to be booted either by in-kernel PRU client drivers or by userspace using the generic remoteproc sysfs interfaces. The sysfs interfaces should not be permitted to change the remoteproc firmwares or states when a PRU is being managed by an in-kernel client driver. Use the newly introduced remoteproc generic 'sysfs_read_only' flag to provide these restrictions by setting and clearing it appropriately during the PRU acquire and release steps.
Signed-off-by: Suman Anna <s-anna@ti.com> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> Signed-off-by: Puranjay Mohan <p-mohan@ti.com> --- drivers/remoteproc/pru_rproc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c index 9ba73cfc29e2..14eb27bb5f3f 100644 --- a/drivers/remoteproc/pru_rproc.c +++ b/drivers/remoteproc/pru_rproc.c @@ -230,6 +230,7 @@ struct rproc *pru_rproc_get(struct device_node *np, int index, } pru->client_np = np; + rproc->sysfs_read_only = true; mutex_unlock(&pru->lock); @@ -268,6 +269,7 @@ void pru_rproc_put(struct rproc *rproc) } pru->client_np = NULL; + rproc->sysfs_read_only = false; mutex_unlock(&pru->lock); rproc_put(rproc); -- 2.25.1
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