From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sylvain Rochet Date: Mon, 26 Oct 2015 09:40:27 +0000 Subject: Re: Possible Regression due to c074fef5d36e ("of/platform: Defer probes of registered devices"). Message-Id: <20151026094027.GA25225@gradator.net> List-Id: References: <20151026032039.GA1950@verge.net.au> In-Reply-To: <20151026032039.GA1950@verge.net.au> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-arm-kernel@lists.infradead.org Hello Simon, On Mon, Oct 26, 2015 at 12:20:39PM +0900, Simon Horman wrote: > Hi, > > I have observed a possible regression in next-20151022 > due to c074fef5d36e ("of/platform: Defer probes of registered devices"). > > The problem manifests on the r8a7791 based koelsch board. > With the above patch present booting the board using the shmobile_defconfig > results in no console output. While after reverting the above patch > the boot proceeds all the way to user-space. > > With DEBUG_LL and EARLY_PRINTK enabled I was able to capture some console > output. I have included both that boot log, and a log of boot all the way to > userspace with the patch in question reverted. > > The problem does not seem to manifiest on other boards for other > Renesas ARM SoCs that I have access too. In particular the > r8a7790 based lager board; the r8a7790 and r8a7791 are both members > of the R-Car Gen2 family of SoCs. Atmel SoC hit this regresssion too, discussion about this issue is in the following thread: https://lkml.org/lkml/2015/10/16/733 Sylvain From mboxrd@z Thu Jan 1 00:00:00 1970 From: sylvain.rochet@finsecur.com (Sylvain Rochet) Date: Mon, 26 Oct 2015 10:40:27 +0100 Subject: Possible Regression due to c074fef5d36e ("of/platform: Defer probes of registered devices"). In-Reply-To: <20151026032039.GA1950@verge.net.au> References: <20151026032039.GA1950@verge.net.au> Message-ID: <20151026094027.GA25225@gradator.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello Simon, On Mon, Oct 26, 2015 at 12:20:39PM +0900, Simon Horman wrote: > Hi, > > I have observed a possible regression in next-20151022 > due to c074fef5d36e ("of/platform: Defer probes of registered devices"). > > The problem manifests on the r8a7791 based koelsch board. > With the above patch present booting the board using the shmobile_defconfig > results in no console output. While after reverting the above patch > the boot proceeds all the way to user-space. > > With DEBUG_LL and EARLY_PRINTK enabled I was able to capture some console > output. I have included both that boot log, and a log of boot all the way to > userspace with the patch in question reverted. > > The problem does not seem to manifiest on other boards for other > Renesas ARM SoCs that I have access too. In particular the > r8a7790 based lager board; the r8a7790 and r8a7791 are both members > of the R-Car Gen2 family of SoCs. Atmel SoC hit this regresssion too, discussion about this issue is in the following thread: https://lkml.org/lkml/2015/10/16/733 Sylvain