From patchwork Sun Dec 1 17:11:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 846720 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 11EF233086; Sun, 1 Dec 2024 17:13:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733073186; cv=none; b=VqSUMIJ5h3TecHfoRhdcHvFdxeV8Ex52ZQoMk5vfe2OhmDErJKP/NOlcilrCJwBAYcC45/bFBKPRwE9A287e4C9C0gdi9uPLJgy+DiDJxW0o5FPKz5EQLC24dm4C89ocJDQxfdfiVGc7+TBBfplPLtsksjieRQCoiEGJE6j7WK8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733073186; c=relaxed/simple; bh=GZDgvFf8CNnTdTo8PVgG8C+++QBsDRSWVueYPc3D//E=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ue4bPpFJJOcxOdFixzGU7A1bE19hUl22GbISp+85d1RV+y6Ar3oljdfR1kD37opOWheyIrq2sA1NM4vrNA3pbomZVLoOOHcSU+nzeKIG6NZW3iD0GSXWd+TOwBPFPYf2zPh05UphkGNRtxo6cxQTPdSoC14Bc1bGArVTmBi2ulo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fWFaYR+s; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fWFaYR+s" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 744F5C4CECF; Sun, 1 Dec 2024 17:13:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733073185; bh=GZDgvFf8CNnTdTo8PVgG8C+++QBsDRSWVueYPc3D//E=; h=From:To:Cc:Subject:Date:From; b=fWFaYR+sxGBYWi1/CBZ8WeE6RzEWvB8c5iWhh0Zj7utud9CgyCZuCq0YWaVoRdmyP rSJmCtgMxuHVMyTNtX3A1KMdFMyn/HJeWljpPbRjr3wABrfwfMZQZdebBiY5OwRR1b 77lZrkUanr2znZlNGCFO5GrXR7ZlzG+VnLrCMaXf/+1l9s7mnMPhbkx4LciL4WzKJi L6zCdfdfT1HA4JAjkxzfT2ZauVYIoxf8eX4i44WgOerK+GR8+0vWA40wFmXjt0Na3+ KQSdXQR1xcp1IIMH0fatTlqbcxuaOlj+9utTyt16jppC0uJJj6Ei4x2Rd7PjNp4eil xk2GUjDZBD8uA== Received: from johan by xi.lan with local (Exim 4.97.1) (envelope-from ) id 1tHnVF-000000008Fi-01Bf; Sun, 01 Dec 2024 18:13:01 +0100 From: Johan Hovold To: Manivannan Sadhasivam Cc: mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , Mayank Rana Subject: [PATCH] bus: mhi: host: pci_generic: fix MHI BAR mapping Date: Sun, 1 Dec 2024 18:11:20 +0100 Message-ID: <20241201171120.31616-1-johan+linaro@kernel.org> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 A recent change converting the MHI pci_generic driver to use pcim_iomap_region() failed to update the BAR parameter which is an index rather than a mask. This specifically broke the modem on machines like the Lenovo ThinkPad X13s and x1e80100 CRD: mhi-pci-generic 0004:01:00.0: failed to map pci region: -22 mhi-pci-generic 0004:01:00.0: probe with driver mhi-pci-generic failed with error -22 Fixes: bd23e836423e ("bus: mhi: host: pci_generic: Use pcim_iomap_region() to request and map MHI BAR") Cc: Manivannan Sadhasivam Cc: Mayank Rana Signed-off-by: Johan Hovold --- The offending patch was marked as "Compile tested only", but that just makes you wonder *why* the patch was never tested... https://lore.kernel.org/all/20241004023351.6946-1-manivannan.sadhasivam@linaro.org/ Johan #regzbot introduced: bd23e836423e drivers/bus/mhi/host/pci_generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c index 07645ce2119a..56ba4192c89c 100644 --- a/drivers/bus/mhi/host/pci_generic.c +++ b/drivers/bus/mhi/host/pci_generic.c @@ -917,7 +917,7 @@ static int mhi_pci_claim(struct mhi_controller *mhi_cntrl, return err; } - mhi_cntrl->regs = pcim_iomap_region(pdev, 1 << bar_num, pci_name(pdev)); + mhi_cntrl->regs = pcim_iomap_region(pdev, bar_num, pci_name(pdev)); if (IS_ERR(mhi_cntrl->regs)) { err = PTR_ERR(mhi_cntrl->regs); dev_err(&pdev->dev, "failed to map pci region: %d\n", err);