[U-Boot] [U-Boot, 1/2] tools: mkenvimage: Fix read() stdin error handling

[Tom Rini]

On Fri, Apr 20, 2018 at 03:29:30PM +0200, Alexander Dahl wrote:

> On success read() returns the number of bytes read or zero for EOF. On
> error -1 is returned and errno is set, so the right way to test if read
> had failed is to test the return value instead of errno.
> 
> Signed-off-by: Alexander Dahl <ada at thorsis.com>

Applied to u-boot/master, thanks!

-- 
Tom
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