[U-Boot] [PATCH] cmd/usb_mass_storage.c: Rework ums_init() ret logic slightly
Marek Vasut
marex at denx.de
Wed Apr 20 17:46:53 CEST 2016
On 04/20/2016 05:01 PM, Tom Rini wrote:
> Previously, ret could be used uninitialized if
> blk_get_device_part_str() failed. Default to ret being set to -1 so
> that we always return an err up if we have a problem and then invert the
> logic on testing ums_count as when that is non-zero is the time we can
> return 0.
>
> Cc: John Tobias <john.tobias.ph at gmail.com>
> Cc: Marek Vasut <marex at denx.de>
> Signed-off-by: Tom Rini <trini at konsulko.com>
> ---
> cmd/usb_mass_storage.c | 9 ++-------
> 1 file changed, 2 insertions(+), 7 deletions(-)
>
> diff --git a/cmd/usb_mass_storage.c b/cmd/usb_mass_storage.c
> index ac53a73..b03d567 100644
> --- a/cmd/usb_mass_storage.c
> +++ b/cmd/usb_mass_storage.c
> @@ -56,7 +56,7 @@ static int ums_init(const char *devtype, const char *devnums_part_str)
> struct blk_desc *block_dev;
> disk_partition_t info;
> int partnum;
> - int ret;
> + int ret = -1;
> struct ums *ums_new;
>
> s = strdup(devnums_part_str);
> @@ -86,13 +86,11 @@ static int ums_init(const char *devtype, const char *devnums_part_str)
>
> /* f_mass_storage.c assumes SECTOR_SIZE sectors */
> if (block_dev->blksz != SECTOR_SIZE) {
You can also drop the {} braces now.
Otherwise,
Acked-by: Marek Vasut <marex at denx.de>
> - ret = -1;
> goto cleanup;
> }
>
> ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
> if (!ums_new) {
> - ret = -1;
> goto cleanup;
> }
> ums = ums_new;
> @@ -111,7 +109,6 @@ static int ums_init(const char *devtype, const char *devnums_part_str)
>
> name = malloc(UMS_NAME_LEN);
> if (!name) {
> - ret = -1;
> goto cleanup;
> }
> snprintf(name, UMS_NAME_LEN, "UMS disk %d", ums_count);
> @@ -127,9 +124,7 @@ static int ums_init(const char *devtype, const char *devnums_part_str)
> ums_count++;
> }
>
> - if (!ums_count)
> - ret = -1;
> - else
> + if (ums_count)
> ret = 0;
>
> cleanup:
>
--
Best regards,
Marek Vasut
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