From: Asutosh Das <quic_asutoshd@quicinc.com>
To: Bart Van Assche <bvanassche@acm.org>
Cc: <mani@kernel.org>, <quic_nguyenb@quicinc.com>,
<quic_xiaosenh@quicinc.com>, <quic_cang@quicinc.com>,
<quic_nitirawa@quicinc.com>, <quic_rampraka@quicinc.com>,
<quic_richardp@quicinc.com>, <stanley.chu@mediatek.com>,
<adrian.hunter@intel.com>, <avri.altman@wdc.com>,
<beanhuo@micron.com>, <martin.petersen@oracle.com>,
<linux-scsi@vger.kernel.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
open list <linux-kernel@vger.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH v1 03/16] ufs: core: Defer adding host to scsi if mcq is supported
Date: Tue, 4 Oct 2022 11:51:59 -0700 [thread overview]
Message-ID: <20221004185159.GB25671@asutoshd-linux1.qualcomm.com> (raw)
In-Reply-To: <4767355d-e7b0-d38b-88f3-c070ed0b5e5b@acm.org>
On Fri, Sep 30 2022 at 11:32 -0700, Bart Van Assche wrote:
>On 9/22/22 18:05, Asutosh Das wrote:
>>@@ -8218,6 +8219,14 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
>> ret = ufshcd_device_params_init(hba);
>> if (ret)
>> goto out;
>>+
>>+ if (is_mcq_supported(hba)) {
>>+ ret = scsi_add_host(host, hba->dev);
>>+ if (ret) {
>>+ dev_err(hba->dev, "scsi_add_host failed\n");
>>+ goto out;
>>+ }
>>+ }
>> }
>
>Calling scsi_add_host() from ufshcd_probe_hba() seems wrong to me
>since that function is not only called when probing a host controller
>but also when resetting a host controller. See also
>ufshcd_host_reset_and_restore().
>
The scsi_add_host() is only invoked from ufshcd_probe_hba() if init_dev_params
is true. That flag is false when ufshcd_probe_hba() is invoked from
ufshcd_host_reset_and_restore(). So scsi_add_host() won't be invoked from
ufshcd_host_reset_and_restore(). Even ufshcd_device_params_init() is invoked the
same way now.
>> ufshcd_tune_unipro_params(hba);
>>@@ -9764,10 +9773,12 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
>> hba->is_irq_enabled = true;
>> }
>>- err = scsi_add_host(host, hba->dev);
>>- if (err) {
>>- dev_err(hba->dev, "scsi_add_host failed\n");
>>- goto out_disable;
>>+ if (!is_mcq_supported(hba)) {
>>+ err = scsi_add_host(host, hba->dev);
>>+ if (err) {
>>+ dev_err(hba->dev, "scsi_add_host failed\n");
>>+ goto out_disable;
>>+ }
>> }
>> hba->tmf_tag_set = (struct blk_mq_tag_set) {
>
>Please make sure there is only a single scsi_add_host() call in the
>UFS host controller driver.
>
One way would be to move the scsi_add_host() to ufshcd_probe_hba().
PLMK if you think this is not OK.
>Thanks,
>
>Bart.
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next prev parent reply other threads:[~2022-10-04 18:53 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-23 1:05 [PATCH v1 00/16] Add Multi Circular Queue Support Asutosh Das
2022-09-23 1:05 ` [PATCH v1 01/16] ufs: core: Probe for ext_iid support Asutosh Das
2022-09-26 14:08 ` Manivannan Sadhasivam
2022-09-30 18:23 ` Bart Van Assche
2022-10-04 22:09 ` Asutosh Das
2022-09-23 1:05 ` [PATCH v1 02/16] ufs: core: Introduce Multi-circular queue capability Asutosh Das
2022-09-24 8:13 ` Avri Altman
2022-09-26 21:34 ` Asutosh Das
2022-09-26 14:27 ` Manivannan Sadhasivam
2022-09-23 1:05 ` [PATCH v1 03/16] ufs: core: Defer adding host to scsi if mcq is supported Asutosh Das
2022-09-30 18:32 ` Bart Van Assche
2022-10-04 18:51 ` Asutosh Das [this message]
2022-09-23 1:05 ` [PATCH v1 04/16] ufs: core: mcq: Introduce Multi Circular Queue Asutosh Das
2022-09-26 14:49 ` Manivannan Sadhasivam
2022-09-26 21:32 ` Asutosh Das
2022-09-30 18:37 ` Bart Van Assche
2022-09-23 1:05 ` [PATCH v1 05/16] ufs: core: mcq: Configure resource regions Asutosh Das
2022-09-26 15:07 ` Manivannan Sadhasivam
2022-09-30 18:42 ` Bart Van Assche
2022-09-23 1:05 ` [PATCH v1 06/16] ufs: core: mcq: Calculate queue depth Asutosh Das
2022-09-26 15:22 ` Manivannan Sadhasivam
2022-09-26 21:23 ` Asutosh Das
2022-09-23 1:05 ` [PATCH v1 07/16] ufs: core: mcq: Allocate memory for mcq mode Asutosh Das
2022-09-26 15:45 ` Manivannan Sadhasivam
2022-10-03 20:25 ` Asutosh Das
2022-09-23 1:05 ` [PATCH v1 08/16] ufs: core: mcq: Configure operation and runtime interface Asutosh Das
2022-09-23 1:05 ` [PATCH v1 09/16] ufs: core: mcq: Use shared tags for MCQ mode Asutosh Das
2022-09-23 1:05 ` [PATCH v1 10/16] ufs: core: Prepare ufshcd_send_command for mcq Asutosh Das
2022-09-23 1:05 ` [PATCH v1 11/16] ufs: core: mcq: Find hardware queue to queue request Asutosh Das
2022-09-23 1:05 ` [PATCH v1 12/16] ufs: core: Prepare for completion in mcq Asutosh Das
2022-09-30 20:43 ` Bart Van Assche
2022-09-23 1:05 ` [PATCH v1 13/16] ufs: mcq: Add completion support of a cqe Asutosh Das
2022-09-30 20:41 ` Bart Van Assche
2022-09-23 1:05 ` [PATCH v1 14/16] ufs: core: mcq: Add completion support in poll Asutosh Das
2022-09-23 1:05 ` [PATCH v1 15/16] ufs: core: mcq: Enable Multi Circular Queue Asutosh Das
2022-09-30 20:32 ` Bart Van Assche
2022-09-23 1:05 ` [PATCH v1 16/16] ufs: qcom-host: Enable multi circular queue capability Asutosh Das
2022-09-26 13:49 ` [PATCH v1 00/16] Add Multi Circular Queue Support Manivannan Sadhasivam
2022-09-26 18:55 ` Asutosh Das
2022-09-30 20:44 ` Bart Van Assche
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