Messages in this thread Patch in this message | | | From | Subhash Jadavani <> | Subject | [PATCH v1 2/4] scsi: ufs-qcom: add probe_defer in case phy driver not probed yet | Date | Mon, 5 Dec 2016 19:25:15 -0800 |
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From: Yaniv Gardi <ygardi@codeaurora.org>
In case UFS driver is probed before the phy driver does, the UFS driver should return a PROBE_DEFER code.
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> --- drivers/scsi/ufs/ufs-qcom.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c index aa43bfe..ff61461 100644 --- a/drivers/scsi/ufs/ufs-qcom.c +++ b/drivers/scsi/ufs/ufs-qcom.c @@ -1194,7 +1194,16 @@ static int ufs_qcom_init(struct ufs_hba *hba) */ host->generic_phy = devm_phy_get(dev, "ufsphy"); - if (IS_ERR(host->generic_phy)) { + if (host->generic_phy == ERR_PTR(-EPROBE_DEFER)) { + /* + * UFS driver might be probed before the phy driver does. + * In that case we would like to return EPROBE_DEFER code. + */ + err = -EPROBE_DEFER; + dev_warn(dev, "%s: required phy device. hasn't probed yet. err = %d\n", + __func__, err); + goto out_variant_clear; + } else if (IS_ERR(host->generic_phy)) { err = PTR_ERR(host->generic_phy); dev_err(dev, "%s: PHY get failed %d\n", __func__, err); goto out_variant_clear; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
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