Thread (3 messages) 3 messages, 3 authors, 2025-03-17

Re: [PATCH v2] mmc: sdhci-brcmstb: add cqhci suspend/resume to PM ops

From: Ulf Hansson <hidden>
Date: 2025-03-17 10:51:56
Also in: linux-mmc, lkml, stable

On Tue, 11 Mar 2025 at 17:59, Kamal Dasu [off-list ref] wrote:
cqhci timeouts observed on brcmstb platforms during suspend:
  ...
  [  164.832853] mmc0: cqhci: timeout for tag 18
  ...

Adding cqhci_suspend()/resume() calls to disable cqe
in sdhci_brcmstb_suspend()/resume() respectively to fix
CQE timeouts seen on PM suspend.

Fixes: d46ba2d17f90 ("mmc: sdhci-brcmstb: Add support for Command Queuing (CQE)")
Cc: stable@vger.kernel.org
Signed-off-by: Kamal Dasu <kamal.dasu@broadcom.com>
Applied for fixes, thanks!

Kind regards
Uffe

quoted hunk ↗ jump to hunk
---
 drivers/mmc/host/sdhci-brcmstb.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c
index 0ef4d578ade8..48cdcba0f39c 100644
--- a/drivers/mmc/host/sdhci-brcmstb.c
+++ b/drivers/mmc/host/sdhci-brcmstb.c
@@ -503,8 +503,15 @@ static int sdhci_brcmstb_suspend(struct device *dev)
        struct sdhci_host *host = dev_get_drvdata(dev);
        struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
        struct sdhci_brcmstb_priv *priv = sdhci_pltfm_priv(pltfm_host);
+       int ret;

        clk_disable_unprepare(priv->base_clk);
+       if (host->mmc->caps2 & MMC_CAP2_CQE) {
+               ret = cqhci_suspend(host->mmc);
+               if (ret)
+                       return ret;
+       }
+
        return sdhci_pltfm_suspend(dev);
 }
@@ -529,6 +536,9 @@ static int sdhci_brcmstb_resume(struct device *dev)
                        ret = clk_set_rate(priv->base_clk, priv->base_freq_hz);
        }

+       if (host->mmc->caps2 & MMC_CAP2_CQE)
+               ret = cqhci_resume(host->mmc);
+
        return ret;
 }
 #endif
--
2.17.1
  
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