[PATCH] fw_env: keep calling read() until whole flash block is read

[Tom Rini]

On Wed, Dec 13, 2023 at 01:13:54PM +0100, Rafał Miłecki wrote:

> From: Rafał Miłecki <rafal at milecki.pl>
> 
> It's totally valid for read() to provide less bytes than requested
> maximum. It may happen if there is no more data available yet or source
> pushes data in small chunks.
> 
> This actually happens when trying to read env data from NVMEM device.
> Kernel may provide NVMEM content in page size parts (like 4096 B).
> 
> This fixes warnings like:
> Warning on /sys/bus/nvmem/devices/u-boot-env0/nvmem: Attempted to read 16384 bytes but got 4096
> Warning on /sys/bus/nvmem/devices/u-boot-env0/nvmem: Attempted to read 12288 bytes but got 4096
> Warning on /sys/bus/nvmem/devices/u-boot-env0/nvmem: Attempted to read 8192 bytes but got 4096
> 
> Since the main loop in flash_read_buf() is used to read blocks this
> patch adds a new nested one.
> 
> Signed-off-by: Rafał Miłecki <rafal at milecki.pl>

Applied to u-boot/next, thanks!

-- 
Tom
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