From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Siddharth Gupta <sidgup@codeaurora.org>
Cc: agross@kernel.org, ohad@wizery.com, corbet@lwn.net,
linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, tsoni@codeaurora.org,
psodagud@codeaurora.org, rishabhb@codeaurora.org,
linux-doc@vger.kernel.org
Subject: Re: [PATCH v4 2/2] remoteproc: core: Register the character device interface
Date: Thu, 16 Jul 2020 22:49:02 -0700 [thread overview]
Message-ID: <20200717054902.GJ2922385@builder.lan> (raw)
In-Reply-To: <1594148870-27276-3-git-send-email-sidgup@codeaurora.org>
On Tue 07 Jul 12:07 PDT 2020, Siddharth Gupta wrote:
> Add the character device during rproc_add. This would create
> a character device node at /dev/remoteproc<index>. Userspace
> applications can interact with the remote processor using this
> interface.
>
> Signed-off-by: Rishabh Bhatnagar <rishabhb@codeaurora.org>
> Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
> ---
> drivers/remoteproc/remoteproc_core.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
> index 0f95e02..ec7fb49 100644
> --- a/drivers/remoteproc/remoteproc_core.c
> +++ b/drivers/remoteproc/remoteproc_core.c
> @@ -1966,6 +1966,13 @@ int rproc_add(struct rproc *rproc)
> struct device *dev = &rproc->dev;
> int ret;
>
> + /* add char device for this remoteproc */
> + ret = rproc_char_device_add(rproc);
> + if (ret) {
> + dev_err(dev, "Failed to add char dev for %s\n", rproc->name);
Please move this error message into rproc_char_device_add(), to make it
consistent with the other error handling in this function not printing.
Apart from that it looks good.
Regards,
Bjorn
> + return ret;
> + }
> +
> ret = device_add(dev);
> if (ret < 0)
> return ret;
> @@ -2241,6 +2248,7 @@ int rproc_del(struct rproc *rproc)
> mutex_unlock(&rproc->lock);
>
> rproc_delete_debug_dir(rproc);
> + rproc_char_device_remove(rproc);
>
> /* the rproc is downref'ed as soon as it's removed from the klist */
> mutex_lock(&rproc_list_mutex);
> @@ -2409,6 +2417,7 @@ static int __init remoteproc_init(void)
> {
> rproc_init_sysfs();
> rproc_init_debugfs();
> + rproc_init_cdev();
> rproc_init_panic();
>
> return 0;
> @@ -2420,6 +2429,7 @@ static void __exit remoteproc_exit(void)
> ida_destroy(&rproc_dev_index);
>
> rproc_exit_panic();
> + rproc_exit_cdev();
> rproc_exit_debugfs();
> rproc_exit_sysfs();
> }
> --
> Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
prev parent reply other threads:[~2020-07-17 5:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-07 19:07 [PATCH v4 0/2] Add character device interface to remoteproc Siddharth Gupta
2020-07-07 19:07 ` [PATCH v4 1/2] remoteproc: Add remoteproc character device interface Siddharth Gupta
2020-07-15 20:18 ` Mathieu Poirier
2020-07-15 21:51 ` Mathieu Poirier
[not found] ` <81d7514c-727e-b4dc-e4ac-74a25966ccaf@codeaurora.org>
2020-07-21 20:56 ` Bjorn Andersson
2020-07-22 17:18 ` Mathieu Poirier
2020-07-22 17:33 ` Siddharth Gupta
2020-07-22 18:01 ` Bjorn Andersson
2020-07-17 5:46 ` Bjorn Andersson
2020-07-20 16:44 ` Mathieu Poirier
2020-07-17 5:32 ` Bjorn Andersson
2020-07-07 19:07 ` [PATCH v4 2/2] remoteproc: core: Register the " Siddharth Gupta
2020-07-17 5:49 ` Bjorn Andersson [this message]
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