From patchwork Wed Sep 25 16:00:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 13812300 Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93F7B134BD for ; Wed, 25 Sep 2024 16:00:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=85.214.62.61 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727280049; cv=none; b=SX6KmbtMKP17AbtFRb4CS1PGpfxx1Z372H+fvafEfZnal5FpKAPch9QqXe2JqADyOkneazuCaie/rFPmZ0+rnImXWLt4BlA4XS63bvBbxoTHa8jNU8k9IFU/lUW0kIlkIQmyd1RZAgOA/JgkgNdV0lkU/zzFuoHbuvYDJt7KvCY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727280049; c=relaxed/simple; bh=S7be5KN6UGGOf23Jltm5kL5ASOA+5n5j6TpUb0Rh4r8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=B/aK7VFSssCuaempgGIvZF30Q9x4PrrUQXH0nJ9BlNW3w/2FqoPkrP6EKmuSF8KueCfLfq9lEENZeKOmm73vzAN+o0s/LAF7fxm0ety6cwZvJX1P+VP72foSxrhuNZwcR3bv5JHNA5Hs3vWJ3GzpIji6muaI8Zc70hgiBRtIS60= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=denx.de; spf=pass smtp.mailfrom=denx.de; dkim=pass (2048-bit key) header.d=denx.de header.i=@denx.de header.b=Hfvng506; arc=none smtp.client-ip=85.214.62.61 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=denx.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=denx.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=denx.de header.i=@denx.de header.b="Hfvng506" Received: from tr.lan (ip-86-49-120-218.bb.vodafone.cz [86.49.120.218]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 09F0087E30; Wed, 25 Sep 2024 18:00:43 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1727280045; bh=WqvSyAtJdJLkJyg1eGohRVV8HBMvuaIpHViAOX2Hufw=; h=From:To:Cc:Subject:Date:From; b=Hfvng506APnt/IorzQSrKlFLcsd64/VsJJM3/jfX0X4g80/84RglqnGwzbIbymsCJ u2EVkWyKPGSqxobu64fK8kJkDU8DCKij9yYJevrCmmKZw3HnRqEhjygXMynQrLiIdt uOlwcDW8R7aFdLa5pMzyIJaKI48eL7YlqXdmNBu/rkxhClvh7+f2hfJHCiYnRocN1+ GuusVY/PuqJsXJew40jhTa9oZMqqW6xXMhG0EzWfHvczTWSRbxfUPCiBxIb+R+DzRL CUjfQ12Yfn3gdK4WC/uATT8p1EDxNld9vDltruyK/b44xNXLvHEfGzhQuYRdasWa3p 0DzHyyCZhOHRQ== From: Marek Vasut To: linux-arm-kernel@lists.infradead.org Cc: kernel@dh-electronics.com, Marek Vasut , AngeloGioacchino Del Regno , Arnd Bergmann , Fabio Estevam , Jeff Johnson , Neil Armstrong , Pengutronix Kernel Team , Saravana Kannan , Sascha Hauer , Shawn Guo , imx@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] soc: imx8m: Probe the SoC driver late Date: Wed, 25 Sep 2024 18:00:11 +0200 Message-ID: <20240925160026.84091-1-marex@denx.de> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean With driver_async_probe=* on kernel command line, the following trace is produced because on i.MX8M Plus hardware because the soc-imx8m.c driver calls of_clk_get_by_name() which returns -EPROBE_DEFER because the clock driver is not yet probed. This was not detected during regular testing without driver_async_probe. Attempt to fix it by probing the SoC driver late, but I don't think that is the correct approach here. " ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1 at drivers/soc/imx/soc-imx8m.c:115 imx8mm_soc_revision+0xdc/0x180 CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0-next-20240924-00002-g2062bb554dea #603 Hardware name: DH electronics i.MX8M Plus DHCOM Premium Developer Kit (3) (DT) pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : imx8mm_soc_revision+0xdc/0x180 lr : imx8mm_soc_revision+0xd0/0x180 sp : ffff8000821fbcc0 x29: ffff8000821fbce0 x28: 0000000000000000 x27: ffff800081810120 x26: ffff8000818a9970 x25: 0000000000000006 x24: 0000000000824311 x23: ffff8000817f42c8 x22: ffff0000df8be210 x21: fffffffffffffdfb x20: ffff800082780000 x19: 0000000000000001 x18: ffffffffffffffff x17: ffff800081fff418 x16: ffff8000823e1000 x15: ffff0000c03b65e8 x14: ffff0000c00051b0 x13: ffff800082790000 x12: 0000000000000801 x11: ffff80008278ffff x10: ffff80008209d3a6 x9 : ffff80008062e95c x8 : ffff8000821fb9a0 x7 : 0000000000000000 x6 : 00000000000080e3 x5 : ffff0000df8c03d8 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : fffffffffffffdfb x0 : fffffffffffffdfb Call trace: imx8mm_soc_revision+0xdc/0x180 imx8_soc_init+0xb0/0x1e0 do_one_initcall+0x94/0x1a8 kernel_init_freeable+0x240/0x2a8 kernel_init+0x28/0x140 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]--- SoC: i.MX8MP revision 1.1 " Signed-off-by: Marek Vasut --- Cc: AngeloGioacchino Del Regno Cc: Arnd Bergmann Cc: Fabio Estevam Cc: Jeff Johnson Cc: Neil Armstrong Cc: Pengutronix Kernel Team Cc: Saravana Kannan Cc: Sascha Hauer Cc: Shawn Guo Cc: imx@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org --- drivers/soc/imx/soc-imx8m.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/soc/imx/soc-imx8m.c b/drivers/soc/imx/soc-imx8m.c index fe111bae38c8e..04d6ab1073b25 100644 --- a/drivers/soc/imx/soc-imx8m.c +++ b/drivers/soc/imx/soc-imx8m.c @@ -251,6 +251,6 @@ static int __init imx8_soc_init(void) kfree(soc_dev_attr); return ret; } -device_initcall(imx8_soc_init); +late_initcall(imx8_soc_init); MODULE_DESCRIPTION("NXP i.MX8M SoC driver"); MODULE_LICENSE("GPL");