linux-kernel - Re: [PATCH v4 2/2] eeprom: at24: use a common prefix for all symbols in at24.c

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Date:   Mon, 18 Dec 2017 18:45:21 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Joe Perches <joe@...ches.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Peter Rosin <peda@...ntia.se>,
        linux-i2c <linux-i2c@...r.kernel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: Re: [PATCH v4 2/2] eeprom: at24: use a common prefix for all symbols
 in at24.c

2017-12-13 11:56 GMT+01:00 Bartosz Golaszewski <brgl@...ev.pl>:
> There are a couple symbols defined in the driver source file which are
> missing the at24_ prefix. This patch fixes that.
>
> For module params: use module_param_named() in order to not break
> userspace.
>
> Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>
> ---
>  drivers/misc/eeprom/at24.c | 34 ++++++++++++++++++----------------
>  1 file changed, 18 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
> index 87b68ef07dfc..c1d2f7e76f92 100644
> --- a/drivers/misc/eeprom/at24.c
> +++ b/drivers/misc/eeprom/at24.c
> @@ -93,17 +93,17 @@ struct at24_data {
>   *
>   * This value is forced to be a power of two so that writes align on pages.
>   */
> -static unsigned int io_limit = 128;
> -module_param(io_limit, uint, 0);
> -MODULE_PARM_DESC(io_limit, "Maximum bytes per I/O (default 128)");
> +static unsigned int at24_io_limit = 128;
> +module_param_named(io_limit, at24_io_limit, uint, 0);
> +MODULE_PARM_DESC(at24_io_limit, "Maximum bytes per I/O (default 128)");
>
>  /*
>   * Specs often allow 5 msec for a page write, sometimes 20 msec;
>   * it's important to recover from write timeouts.
>   */
> -static unsigned int write_timeout = 25;
> -module_param(write_timeout, uint, 0);
> -MODULE_PARM_DESC(write_timeout, "Time (in ms) to try writes (default 25)");
> +static unsigned int at24_write_timeout = 25;
> +module_param_named(write_timeout, at24_write_timeout, uint, 0);
> +MODULE_PARM_DESC(at24_write_timeout, "Time (in ms) to try writes (default 25)");
>
>  #define AT24_SIZE_BYTELEN 5
>  #define AT24_SIZE_FLAGS 8
> @@ -126,8 +126,9 @@ MODULE_PARM_DESC(write_timeout, "Time (in ms) to try writes (default 25)");
>   * iteration of processing the request. Both should be unsigned integers
>   * holding at least 32 bits.
>   */
> -#define loop_until_timeout(tout, op_time)                              \
> -       for (tout = jiffies + msecs_to_jiffies(write_timeout), op_time = 0; \
> +#define at24_loop_until_timeout(tout, op_time)                         \
> +       for (tout = jiffies + msecs_to_jiffies(at24_write_timeout),     \
> +            op_time = 0;                                               \
>              op_time ? time_before(op_time, tout) : true;               \
>              usleep_range(1000, 1500), op_time = jiffies)
>
> @@ -290,13 +291,13 @@ static ssize_t at24_regmap_read(struct at24_data *at24, char *buf,
>         regmap = at24_client->regmap;
>         client = at24_client->client;
>
> -       if (count > io_limit)
> -               count = io_limit;
> +       if (count > at24_io_limit)
> +               count = at24_io_limit;
>
>         /* adjust offset for mac and serial read ops */
>         offset += at24->offset_adj;
>
> -       loop_until_timeout(timeout, read_time) {
> +       at24_loop_until_timeout(timeout, read_time) {
>                 ret = regmap_bulk_read(regmap, offset, buf, count);
>                 dev_dbg(&client->dev, "read %zu@%d --> %d (%ld)\n",
>                         count, offset, ret, jiffies);
> @@ -347,7 +348,7 @@ static ssize_t at24_regmap_write(struct at24_data *at24, const char *buf,
>         client = at24_client->client;
>         count = at24_adjust_write_count(at24, offset, count);
>
> -       loop_until_timeout(timeout, write_time) {
> +       at24_loop_until_timeout(timeout, write_time) {
>                 ret = regmap_bulk_write(regmap, offset, buf, count);
>                 dev_dbg(&client->dev, "write %zu@%d --> %d (%ld)\n",
>                         count, offset, ret, jiffies);
> @@ -613,7 +614,8 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
>
>         writable = !(chip.flags & AT24_FLAG_READONLY);
>         if (writable) {
> -               at24->write_max = min_t(unsigned int, chip.page_size, io_limit);
> +               at24->write_max = min_t(unsigned int,
> +                                       chip.page_size, at24_io_limit);
>                 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C) &&
>                     at24->write_max > I2C_SMBUS_BLOCK_MAX)
>                         at24->write_max = I2C_SMBUS_BLOCK_MAX;
> @@ -728,12 +730,12 @@ static struct i2c_driver at24_driver = {
>
>  static int __init at24_init(void)
>  {
> -       if (!io_limit) {
> -               pr_err("at24: io_limit must not be 0!\n");
> +       if (!at24_io_limit) {
> +               pr_err("at24: at24_io_limit must not be 0!\n");
>                 return -EINVAL;
>         }
>
> -       io_limit = rounddown_pow_of_two(io_limit);
> +       at24_io_limit = rounddown_pow_of_two(at24_io_limit);
>         return i2c_add_driver(&at24_driver);
>  }
>  module_init(at24_init);
> --
> 2.15.1
>

There were no more comments, so patch applied.