From: David Lechner <david@lechnology.com>
To: William Breathitt Gray <vilhelm.gray@gmail.com>, jic23@kernel.org
Cc: kamel.bouhara@bootlin.com, gwendal@chromium.org,
alexandre.belloni@bootlin.com, linux-iio@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org, syednwaris@gmail.com,
patrick.havelange@essensium.com, fabrice.gasnier@st.com,
mcoquelin.stm32@gmail.com, alexandre.torgue@st.com
Subject: Re: [PATCH v5 1/5] counter: Internalize sysfs interface code
Date: Wed, 14 Oct 2020 20:38:40 -0500 [thread overview]
Message-ID: <17c22445-d523-07f8-d1ff-59e8dbc73cc8@lechnology.com> (raw)
In-Reply-To: <e38f6dc3a08bf2510034334262776a6ed1df8b89.1601170670.git.vilhelm.gray@gmail.com>
On 9/26/20 9:18 PM, William Breathitt Gray wrote:
> +static ssize_t counter_comp_u8_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t len)
> +{
> + const struct counter_attribute *const a = to_counter_attribute(attr);
> + struct counter_device *const counter = dev_get_drvdata(dev);
> + struct counter_count *const count = a->parent;
> + struct counter_synapse *const synapse = a->comp.priv;
> + const struct counter_available *const avail = a->comp.priv;
> + int err;
> + bool bool_data;
> + u8 data;
> +
> + switch (a->comp.type) {
> + case COUNTER_COMP_BOOL:
> + err = kstrtobool(buf, &bool_data);
> + data = bool_data;
> + break;
> + case COUNTER_COMP_FUNCTION:
> + err = find_in_string_array(&data, count->functions_list,
> + count->num_functions, buf,
> + counter_function_str);
> + break;
> + case COUNTER_COMP_SYNAPSE_ACTION:
> + err = find_in_string_array(&data, synapse->actions_list,
> + synapse->num_actions, buf,
> + counter_synapse_action_str);
> + break;
> + case COUNTER_COMP_ENUM:
> + err = __sysfs_match_string(avail->strs, avail->num_items, buf);
> + data = err;
> + break;
> + case COUNTER_COMP_COUNT_MODE:
> + err = find_in_string_array(&data, avail->enums,
> + avail->num_items, buf,
> + counter_count_mode_str);
> + break;
> + default:
> + err = kstrtou8(buf, 0, &data);
> + break;
> + }
In this function, return values are not always errors. So it would make
sense to call the err variable ret instead and check for ret < 0 below.
Setting enums to a value with index > 0 fails currently because of this.
> + if (err)
> + return err;
> +
> + switch (a->scope) {
> + case COUNTER_SCOPE_DEVICE:
> + err = a->comp.device_u8_write(counter, data);
> + break;
> + case COUNTER_SCOPE_SIGNAL:
> + err = a->comp.signal_u8_write(counter, a->parent, data);
> + break;
> + case COUNTER_SCOPE_COUNT:
> + if (a->comp.type == COUNTER_COMP_SYNAPSE_ACTION)
> + err = a->comp.action_write(counter, count, synapse,
> + data);
> + else
> + err = a->comp.count_u8_write(counter, count, data);
> + break;
> + }
> + if (err)
> + return err;
> +
> + return len;
> +}
next prev parent reply other threads:[~2020-10-15 1:38 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-27 2:18 [PATCH v5 0/5] Introduce the Counter character device interface William Breathitt Gray
2020-09-27 2:18 ` [PATCH v5 1/5] counter: Internalize sysfs interface code William Breathitt Gray
2020-10-13 2:15 ` David Lechner
2020-10-18 14:49 ` William Breathitt Gray
2020-10-20 15:38 ` David Lechner
2020-10-23 13:12 ` William Breathitt Gray
2020-10-15 1:38 ` David Lechner [this message]
2020-10-18 17:00 ` William Breathitt Gray
2020-09-27 2:18 ` [PATCH v5 2/5] docs: counter: Update to reflect sysfs internalization William Breathitt Gray
2020-09-27 2:18 ` [PATCH v5 3/5] counter: Add character device interface William Breathitt Gray
2020-10-14 1:40 ` David Lechner
2020-10-18 16:49 ` William Breathitt Gray
2020-10-20 15:53 ` David Lechner
2020-10-25 12:55 ` William Breathitt Gray
2020-10-25 16:36 ` David Lechner
2020-10-14 17:43 ` David Lechner
2020-10-14 19:05 ` William Breathitt Gray
2020-10-14 22:32 ` David Lechner
2020-10-14 22:40 ` David Lechner
2020-10-18 16:58 ` William Breathitt Gray
2020-10-20 16:06 ` David Lechner
2020-10-25 13:18 ` William Breathitt Gray
2020-10-25 16:34 ` David Lechner
2020-10-25 17:53 ` William Breathitt Gray
2020-09-27 2:18 ` [PATCH v5 4/5] docs: counter: Document " William Breathitt Gray
2020-10-08 8:09 ` Pavel Machek
2020-10-08 12:28 ` William Breathitt Gray
2020-10-12 17:04 ` David Lechner
2020-10-13 18:58 ` William Breathitt Gray
2020-10-13 19:08 ` David Lechner
2020-10-13 19:27 ` William Breathitt Gray
2020-09-27 2:18 ` [PATCH v5 5/5] counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8 William Breathitt Gray
2020-10-14 0:13 ` David Lechner
2020-10-18 14:50 ` William Breathitt Gray
2020-10-13 0:35 ` [PATCH v5 0/5] Introduce the Counter character device interface David Lechner
2020-10-18 14:14 ` William Breathitt Gray
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