On 19/08/2014 17:54, Stefan Agner wrote: > The status register 1 (S1) is not writeable, hence we should not > write it. In order to clear the RDRF flag we only need to read > the data register. > > Also, when stressing U-Boot a lot with serial input, an overflow can > occur which asserts the S1_OR flag (while not asserting the S1_RDRF > flag). To clear this flag we again just need to read the data > register, hence add this flag to the abort conditions for the while > loop. > > Insert a compiler barrier to make sure reading the data register > gets executed after reading the status register. > > Signed-off-by: Stefan Agner <ste...@agner.ch> > ---
Applied to u-boot-imx, thanks! Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
