Re: [PATCH 2/2] scsi: ufs: Use the resource-managed function to add devfreq device

From: Subhash Jadavani
Date: Wed Oct 26 2016 - 13:23:15 EST


On 2016-10-26 00:38, Chanwoo Choi wrote:
This patch uses the resource-managed to add the devfreq device.
This function will make it easy to handle the devfreq device.

- struct devfreq *devm_devfreq_add_device(struct device *dev,
struct devfreq_dev_profile *profile,
const char *governor_name,
void *data);
Cc: Vinayak Holikatti <vinholikatti@xxxxxxxxx>
Cc: James E.J. Bottomley <jejb@xxxxxxxxxxxxxxxxxx>
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index f08d41a2d70b..e639071fd3a1 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6198,8 +6198,6 @@ void ufshcd_remove(struct ufs_hba *hba)
scsi_host_put(hba->host);

ufshcd_exit_clk_gating(hba);
- if (ufshcd_is_clkscaling_enabled(hba))
- devfreq_remove_device(hba->devfreq);
ufshcd_hba_exit(hba);
}
EXPORT_SYMBOL_GPL(ufshcd_remove);
@@ -6495,7 +6493,7 @@ int ufshcd_init(struct ufs_hba *hba, void
__iomem *mmio_base, unsigned int irq)
}

if (ufshcd_is_clkscaling_enabled(hba)) {
- hba->devfreq = devfreq_add_device(dev, &ufs_devfreq_profile,
+ hba->devfreq = devm_devfreq_add_device(dev, &ufs_devfreq_profile,
"simple_ondemand", NULL);
if (IS_ERR(hba->devfreq)) {
dev_err(hba->dev, "Unable to register with devfreq %ld\n",

This change looks good to me but this will have merge conflicts if this gets in after my patch series " [PATCH v1 00/11] scsi: ufs: bug fixes patch series #1" (due to "[PATCH v1 06/11] scsi: ufs: suspend clock scaling for failed runtime_resume"). so if you can, please pull in my patch series and rebase your change on top of it and send it out again.

Thanks,
Subhash

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