[PATCH v2 15/17] crypto: qce: Defer probing if BAM dma is not yet initialized
STALE1962d
From: Bhupesh Sharma <hidden>
Date: 2021-05-05 21:40:11
Also in:
linux-arm-msm, linux-clk, linux-crypto, linux-devicetree, lkml
Subsystem:
arm/qualcomm mailing list, crypto api, dma generic offload engine subsystem, qualcomm crypto drivers, the rest · Maintainers:
Herbert Xu, "David S. Miller", Vinod Koul, Bartosz Golaszewski, Linus Torvalds
Revision v2 of 3 in this series.
Revisions (3)
- v2 current
- v3 [diff vs current]
- v4 [diff vs current]
Since the Qualcomm qce crypto driver needs the BAM dma driver to be setup first (to allow crypto operations), it makes sense to defer the qce crypto driver probing in case the BAM dma driver is not yet probed. This fixes the qce probe failure issues when both qce and BMA dma are compiled as static part of the kernel. Cc: Thara Gopinath <redacted> Cc: Bjorn Andersson <redacted> Cc: Rob Herring <robh+dt@kernel.org> Cc: Andy Gross <agross@kernel.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: David S. Miller <davem@davemloft.net> Cc: Stephen Boyd <sboyd@kernel.org> Cc: Michael Turquette <redacted> Cc: Vinod Koul <vkoul@kernel.org> Cc: dmaengine@vger.kernel.org Cc: linux-clk@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: bhupesh.linux@gmail.com Signed-off-by: Bhupesh Sharma <redacted> --- drivers/crypto/qce/core.c | 4 ++++ drivers/dma/qcom/bam_dma.c | 7 +++++++ 2 files changed, 11 insertions(+)
diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
index 9a7d7ef94687..3e742e9911fa 100644
--- a/drivers/crypto/qce/core.c
+++ b/drivers/crypto/qce/core.c@@ -15,6 +15,7 @@ #include <linux/types.h> #include <crypto/algapi.h> #include <crypto/internal/hash.h> +#include <soc/qcom/bam_dma.h> #include "core.h" #include "cipher.h"
@@ -201,6 +202,9 @@ static int qce_crypto_probe(struct platform_device *pdev) of_match_device(qce_crypto_of_match, &pdev->dev); int ret; + /* qce driver requires BAM dma driver to be setup first */ + if (!bam_is_probed()) + return -EPROBE_DEFER; qce = devm_kzalloc(dev, sizeof(*qce), GFP_KERNEL); if (!qce)
diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index 2bc3b7c7ee5a..c854fcc82dbf 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c@@ -935,6 +935,12 @@ static void bam_channel_init(struct bam_device *bdev, struct bam_chan *bchan, INIT_LIST_HEAD(&bchan->desc_list); } +bool bam_is_probed(void) +{ + return bam_probed; +} +EXPORT_SYMBOL_GPL(bam_is_probed); + static const struct of_device_id bam_of_match[] = { { .compatible = "qcom,bam-v1.3.0", .data = &bam_v1_3_reg_info }, { .compatible = "qcom,bam-v1.4.0", .data = &bam_v1_4_reg_info },
@@ -1084,6 +1090,7 @@ static int bam_dma_probe(struct platform_device *pdev) if (ret) goto err_unregister_dma; + bam_probed = true; if (!bdev->bamclk) { pm_runtime_disable(&pdev->dev); return 0;
--
2.30.2