[PATCH] mtd: spi-nor: fix flash probing

[Tudor Ambarus]

On 9/9/24 8:28 AM, Michael Walle wrote:
> Fix flash probing by name. Flash entries without a name are allowed
> since commit 15eb8303bb42 ("mtd: spi-nor: mark the flash name as
> obsolete"). But it was just until recently that a flash entry without a
> name was actually introduced. This triggers a bug in the legacy probe by
> name path. Skip entries without a name to fix it.
> 
> Fixes: 2095e7da8049 ("mtd: spi-nor: spansion: Add support for S28HS256T")
> Reported-by: Jon Hunter <jonathanh at nvidia.com>
> Closes: https://lore.kernel.org/r/66c8ebb0-1324-4ad9-9926-8d4eb7e1e63a@nvidia.com/
> Tested-by: Jon Hunter <jonathanh at nvidia.com>
> Signed-off-by: Michael Walle <mwalle at kernel.org>

Reviewed-by: Tudor Ambarus <tudor.ambarus at linaro.org>

> ---
>  drivers/mtd/spi-nor/core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> index d8e551fd2e2a..101ee5b0ddeb 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -3281,7 +3281,8 @@ static const struct flash_info *spi_nor_match_name(struct spi_nor *nor,
>  
>  	for (i = 0; i < ARRAY_SIZE(manufacturers); i++) {
>  		for (j = 0; j < manufacturers[i]->nparts; j++) {
> -			if (!strcmp(name, manufacturers[i]->parts[j].name)) {
> +			if (manufacturers[i]->parts[j].name &&
> +			    !strcmp(name, manufacturers[i]->parts[j].name)) {
>  				nor->manufacturer = manufacturers[i];
>  				return &manufacturers[i]->parts[j];
>  			}