[U-Boot] [PATCH v2] mmc: fsl_esdhc: Avoid infinite loop in esdhc_send_cmd_common()

[Fabio Estevam]

Hi Tom/Stefano,

On Sat, Dec 8, 2018 at 12:58 PM Fabio Estevam <festevam at gmail.com> wrote:
>
> Hi Jaehoon,
>
> On Mon, Nov 19, 2018 at 10:31 AM Fabio Estevam <festevam at gmail.com> wrote:
> >
> > The following hang is observed on a Hummingboard 2 MicroSOM
> > i2eX iMX6D - rev 1.3 with no eMMC populated on board:
> >
> > U-Boot SPL 2018.11+gf6206f8587 (Nov 16 2018 - 00:56:34 +0000)
> > Trying to boot from MMC1
> >
> > U-Boot 2018.11+gf6206f8587 (Nov 16 2018 - 00:56:34 +0000)
> >
> > CPU:   Freescale i.MX6D rev1.5 996 MHz (running at 792 MHz)
> > CPU:   Extended Commercial temperature grade (-20C to 105C) at 33C
> > Reset cause: POR
> > Board: MX6 HummingBoard2
> > DRAM:  1 GiB
> > MMC:   FSL_SDHC: 0, FSL_SDHC: 1
> > Loading Environment from MMC... *** Warning - bad CRC, using default environment
> >
> > No panel detected: default to HDMI
> > Display: HDMI (1024x768)
> > In:    serial
> > Out:   serial
> > Err:   serial
> > ---> hangs
> >
> > which is caused by the following infinite loop inside esdhc_send_cmd_common()
> >
> >         while (!(esdhc_read32(&regs->irqstat) & flags))
> >                 ;
> >
> > Instead of looping forever, provide an exit path so that a timeout
> > error can be propagated in the case irqstat does not report
> > any interrupts, which may happen when no eMMC is populated on
> > board.
> >
> > Reported-by: Ricardo Salveti <rsalveti at rsalveti.net>
> > Signed-off-by: Fabio Estevam <festevam at gmail.com>
>
> Could this one be applied to 2019.01?

I haven't heard back from Jaehoon.

Can we have this one applied for 2019.01 in order to fix a regression?

Thanks