Hi, > Am 19.06.2018 um 19:22 schrieb Andreas Kemnade <[email protected]>: > > On Tue, 19 Jun 2018 11:38:26 +0200 > "H. Nikolaus Schaller" <[email protected]> wrote: > >> Hi, >> we did hunt a while for a big bug in the kernel. >> It was a little flaky and random but the main >> symptom was a kernel NULL pointer panic in >> strcmp(). >> >> The result was that the GTA04 (and also the Pyra) >> did not continue to boot properly. Sometimes it >> came to a login: but then several drivers were >> missing. >> >> After hunting down the bug it was not a device >> driver but a race and dangling pointer problem >> in the pincontrol subsystem. >> >> Now we got some patches from the maintainer and >> the problem seems to have disappeared. >> >> Well, has it or hasn't is? > > compiled dca26f608a765008b869991bf29fa241769599fb + my compile fix > > result: strcmp problem again. > [ 7.335571] [<c074abc0>] (strcmp) from [<c04266bc>] > (pinctrl_generic_add_group+0x50/0xc4) > [ 7.344116] [<c04266bc>] (pinctrl_generic_add_group) from [<c042b920>] > (pcs_dt_node_to_map+0x484/0x820) > [ 7.353912] [<c042b920>] (pcs_dt_node_to_map) from [<c04298f4>] > (pinctrl_dt_to_map+0x220/0x2bc) > [ 7.363006] [<c04298f4>] (pinctrl_dt_to_map) from [<c04269c4>] > (create_pinctrl+0x5c/0x318)
Hm... I did a quick boot - and on first boot I also got a strcmp(NULL). From the SD card which I had used for extensive testing yesterday. What the hell is going on here? Well, there is one difference. I removed the /etc/modprobe.d/blacklist.conf so that some blacklisted drivers are loaded now (omap3isp for example) and the load sequence and probe deferral may have changed. BR, Nikolaus
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