Re: [PATCH] memstick/mspro_block: Convert to use sysfs_emit()/sysfs_emit_at() APIs

From: Ulf Hansson
Date: Fri Dec 09 2022 - 04:31:48 EST

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On Thu, 8 Dec 2022 at 04:38, <ye.xingchen@xxxxxxxxxx> wrote:
>
> From: ye xingchen <ye.xingchen@xxxxxxxxxx>
>
> Follow the advice of the Documentation/filesystems/sysfs.rst and show()
> should only use sysfs_emit() or sysfs_emit_at() when formatting the
> value to be returned to user space.
>
> Signed-off-by: ye xingchen <ye.xingchen@xxxxxxxxxx>

Applied for next, thanks!

Kind regards
Uffe

> ---
> drivers/memstick/core/mspro_block.c | 177 +++++++++++-----------------
> 1 file changed, 72 insertions(+), 105 deletions(-)
>
> diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
> index 61cf75d4a01e..5a69ed33999b 100644
> --- a/drivers/memstick/core/mspro_block.c
> +++ b/drivers/memstick/core/mspro_block.c
> @@ -260,8 +260,8 @@ static ssize_t mspro_block_attr_show_default(struct device *dev,
> buffer[rc++] = '\n';
> }
>
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "%02x ",
> - ((unsigned char *)s_attr->data)[cnt]);
> + rc += sysfs_emit_at(buffer, rc, "%02x ",
> + ((unsigned char *)s_attr->data)[cnt]);
> }
> return rc;
> }
> @@ -290,61 +290,43 @@ static ssize_t mspro_block_attr_show_sysinfo(struct device *dev,
> date_tz_f *= 15;
> }
>
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "class: %x\n",
> - x_sys->class);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block size: %x\n",
> - be16_to_cpu(x_sys->block_size));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "block count: %x\n",
> - be16_to_cpu(x_sys->block_count));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "user block count: %x\n",
> - be16_to_cpu(x_sys->user_block_count));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "page size: %x\n",
> - be16_to_cpu(x_sys->page_size));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly date: "
> - "GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
> - date_tz, date_tz_f,
> - be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
> - x_sys->assembly_date[3], x_sys->assembly_date[4],
> - x_sys->assembly_date[5], x_sys->assembly_date[6],
> - x_sys->assembly_date[7]);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "serial number: %x\n",
> - be32_to_cpu(x_sys->serial_number));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
> - "assembly maker code: %x\n",
> - x_sys->assembly_maker_code);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "assembly model code: "
> - "%02x%02x%02x\n", x_sys->assembly_model_code[0],
> - x_sys->assembly_model_code[1],
> - x_sys->assembly_model_code[2]);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory maker code: %x\n",
> - be16_to_cpu(x_sys->memory_maker_code));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "memory model code: %x\n",
> - be16_to_cpu(x_sys->memory_model_code));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vcc: %x\n",
> - x_sys->vcc);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "vpp: %x\n",
> - x_sys->vpp);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller number: %x\n",
> - be16_to_cpu(x_sys->controller_number));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
> - "controller function: %x\n",
> - be16_to_cpu(x_sys->controller_function));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
> - be16_to_cpu(x_sys->start_sector));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "unit size: %x\n",
> - be16_to_cpu(x_sys->unit_size));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sub class: %x\n",
> - x_sys->ms_sub_class);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "interface type: %x\n",
> - x_sys->interface_type);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "controller code: %x\n",
> - be16_to_cpu(x_sys->controller_code));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "format type: %x\n",
> - x_sys->format_type);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "device type: %x\n",
> - x_sys->device_type);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "mspro id: %s\n",
> - x_sys->mspro_id);
> + rc += sysfs_emit_at(buffer, rc, "class: %x\n", x_sys->class);
> + rc += sysfs_emit_at(buffer, rc, "block size: %x\n", be16_to_cpu(x_sys->block_size));
> + rc += sysfs_emit_at(buffer, rc, "block count: %x\n", be16_to_cpu(x_sys->block_count));
> + rc += sysfs_emit_at(buffer, rc, "user block count: %x\n",
> + be16_to_cpu(x_sys->user_block_count));
> + rc += sysfs_emit_at(buffer, rc, "page size: %x\n", be16_to_cpu(x_sys->page_size));
> + rc += sysfs_emit_at(buffer, rc, "assembly date: GMT%+d:%d %04u-%02u-%02u %02u:%02u:%02u\n",
> + date_tz, date_tz_f,
> + be16_to_cpup((__be16 *)&x_sys->assembly_date[1]),
> + x_sys->assembly_date[3], x_sys->assembly_date[4],
> + x_sys->assembly_date[5], x_sys->assembly_date[6],
> + x_sys->assembly_date[7]);
> + rc += sysfs_emit_at(buffer, rc, "serial number: %x\n", be32_to_cpu(x_sys->serial_number));
> + rc += sysfs_emit_at(buffer, rc, "assembly maker code: %x\n", x_sys->assembly_maker_code);
> + rc += sysfs_emit_at(buffer, rc, "assembly model code: %02x%02x%02x\n",
> + x_sys->assembly_model_code[0],
> + x_sys->assembly_model_code[1],
> + x_sys->assembly_model_code[2]);
> + rc += sysfs_emit_at(buffer, rc, "memory maker code: %x\n",
> + be16_to_cpu(x_sys->memory_maker_code));
> + rc += sysfs_emit_at(buffer, rc, "memory model code: %x\n",
> + be16_to_cpu(x_sys->memory_model_code));
> + rc += sysfs_emit_at(buffer, rc, "vcc: %x\n", x_sys->vcc);
> + rc += sysfs_emit_at(buffer, rc, "vpp: %x\n", x_sys->vpp);
> + rc += sysfs_emit_at(buffer, rc, "controller number: %x\n",
> + be16_to_cpu(x_sys->controller_number));
> + rc += sysfs_emit_at(buffer, rc, "controller function: %x\n",
> + be16_to_cpu(x_sys->controller_function));
> + rc += sysfs_emit_at(buffer, rc, "start sector: %x\n", be16_to_cpu(x_sys->start_sector));
> + rc += sysfs_emit_at(buffer, rc, "unit size: %x\n", be16_to_cpu(x_sys->unit_size));
> + rc += sysfs_emit_at(buffer, rc, "sub class: %x\n", x_sys->ms_sub_class);
> + rc += sysfs_emit_at(buffer, rc, "interface type: %x\n", x_sys->interface_type);
> + rc += sysfs_emit_at(buffer, rc, "controller code: %x\n",
> + be16_to_cpu(x_sys->controller_code));
> + rc += sysfs_emit_at(buffer, rc, "format type: %x\n", x_sys->format_type);
> + rc += sysfs_emit_at(buffer, rc, "device type: %x\n", x_sys->device_type);
> + rc += sysfs_emit_at(buffer, rc, "mspro id: %s\n", x_sys->mspro_id);
> return rc;
> }
>
> @@ -356,7 +338,7 @@ static ssize_t mspro_block_attr_show_modelname(struct device *dev,
> struct mspro_sys_attr,
> dev_attr);
>
> - return scnprintf(buffer, PAGE_SIZE, "%s", (char *)s_attr->data);
> + return sysfs_emit(buffer, "%s", (char *)s_attr->data);
> }
>
> static ssize_t mspro_block_attr_show_mbr(struct device *dev,
> @@ -369,27 +351,17 @@ static ssize_t mspro_block_attr_show_mbr(struct device *dev,
> struct mspro_mbr *x_mbr = x_attr->data;
> ssize_t rc = 0;
>
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "boot partition: %x\n",
> - x_mbr->boot_partition);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start head: %x\n",
> - x_mbr->start_head);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sector: %x\n",
> - x_mbr->start_sector);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cylinder: %x\n",
> - x_mbr->start_cylinder);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "partition type: %x\n",
> - x_mbr->partition_type);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end head: %x\n",
> - x_mbr->end_head);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end sector: %x\n",
> - x_mbr->end_sector);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "end cylinder: %x\n",
> - x_mbr->end_cylinder);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start sectors: %x\n",
> - x_mbr->start_sectors);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc,
> - "sectors per partition: %x\n",
> - x_mbr->sectors_per_partition);
> + rc += sysfs_emit_at(buffer, rc, "boot partition: %x\n", x_mbr->boot_partition);
> + rc += sysfs_emit_at(buffer, rc, "start head: %x\n", x_mbr->start_head);
> + rc += sysfs_emit_at(buffer, rc, "start sector: %x\n", x_mbr->start_sector);
> + rc += sysfs_emit_at(buffer, rc, "start cylinder: %x\n", x_mbr->start_cylinder);
> + rc += sysfs_emit_at(buffer, rc, "partition type: %x\n", x_mbr->partition_type);
> + rc += sysfs_emit_at(buffer, rc, "end head: %x\n", x_mbr->end_head);
> + rc += sysfs_emit_at(buffer, rc, "end sector: %x\n", x_mbr->end_sector);
> + rc += sysfs_emit_at(buffer, rc, "end cylinder: %x\n", x_mbr->end_cylinder);
> + rc += sysfs_emit_at(buffer, rc, "start sectors: %x\n", x_mbr->start_sectors);
> + rc += sysfs_emit_at(buffer, rc, "sectors per partition: %x\n",
> + x_mbr->sectors_per_partition);
> return rc;
> }
>
> @@ -409,22 +381,19 @@ static ssize_t mspro_block_attr_show_specfile(struct device *dev,
> memcpy(ext, x_spfile->ext, 3);
> ext[3] = 0;
>
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
> - x_spfile->attr);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
> - x_spfile->time >> 11,
> - (x_spfile->time >> 5) & 0x3f,
> - (x_spfile->time & 0x1f) * 2);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
> - (x_spfile->date >> 9) + 1980,
> - (x_spfile->date >> 5) & 0xf,
> - x_spfile->date & 0x1f);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
> - x_spfile->cluster);
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
> - x_spfile->size);
> + rc += sysfs_emit_at(buffer, rc, "name: %s\n", name);
> + rc += sysfs_emit_at(buffer, rc, "ext: %s\n", ext);
> + rc += sysfs_emit_at(buffer, rc, "attribute: %x\n", x_spfile->attr);
> + rc += sysfs_emit_at(buffer, rc, "time: %d:%d:%d\n",
> + x_spfile->time >> 11,
> + (x_spfile->time >> 5) & 0x3f,
> + (x_spfile->time & 0x1f) * 2);
> + rc += sysfs_emit_at(buffer, rc, "date: %d-%d-%d\n",
> + (x_spfile->date >> 9) + 1980,
> + (x_spfile->date >> 5) & 0xf,
> + x_spfile->date & 0x1f);
> + rc += sysfs_emit_at(buffer, rc, "start cluster: %x\n", x_spfile->cluster);
> + rc += sysfs_emit_at(buffer, rc, "size: %x\n", x_spfile->size);
> return rc;
> }
>
> @@ -438,16 +407,14 @@ static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
> struct mspro_devinfo *x_devinfo = x_attr->data;
> ssize_t rc = 0;
>
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "cylinders: %x\n",
> - be16_to_cpu(x_devinfo->cylinders));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "heads: %x\n",
> - be16_to_cpu(x_devinfo->heads));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per track: %x\n",
> - be16_to_cpu(x_devinfo->bytes_per_track));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "bytes per sector: %x\n",
> - be16_to_cpu(x_devinfo->bytes_per_sector));
> - rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "sectors per track: %x\n",
> - be16_to_cpu(x_devinfo->sectors_per_track));
> + rc += sysfs_emit_at(buffer, rc, "cylinders: %x\n", be16_to_cpu(x_devinfo->cylinders));
> + rc += sysfs_emit_at(buffer, rc, "heads: %x\n", be16_to_cpu(x_devinfo->heads));
> + rc += sysfs_emit_at(buffer, rc, "bytes per track: %x\n",
> + be16_to_cpu(x_devinfo->bytes_per_track));
> + rc += sysfs_emit_at(buffer, rc, "bytes per sector: %x\n",
> + be16_to_cpu(x_devinfo->bytes_per_sector));
> + rc += sysfs_emit_at(buffer, rc, "sectors per track: %x\n",
> + be16_to_cpu(x_devinfo->sectors_per_track));
> return rc;
> }
>
> --
> 2.25.1

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