Can Guo adad2bc9f3 scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE ... [ Upstream commit 73cc291c27 ] If someone plays with the UFS clk scaling devfreq governor through sysfs, ufshcd_devfreq_scale may be called even when HBA is not runtime ACTIVE. This can lead to unexpected error. We cannot just protect it by calling pm_runtime_get_sync() because that may cause a race condition since HBA runtime suspend ops need to suspend clk scaling. To fix this call pm_runtime_get_noresume() and check HBA's runtime status. Only proceed if HBA is runtime ACTIVE, otherwise just bail. governor_store devfreq_performance_handler update_devfreq devfreq_set_target ufshcd_devfreq_target ufshcd_devfreq_scale Link: https://lore.kernel.org/r/1600758548-28576-1-git-send-email-cang@codeaurora.org Reviewed-by: Stanley Chu <stanley.chu@mediatek.com> Signed-off-by: Can Guo <cang@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-12-16 10:56:56 +01:00
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Kconfig	…
Makefile	…
cdns-pltfrm.c	…
tc-dwc-g210-pci.c	…
tc-dwc-g210-pltfrm.c	…
tc-dwc-g210.c	…
tc-dwc-g210.h	…
ufs-hisi.c	…
ufs-hisi.h	…
ufs-mediatek.c	…
ufs-mediatek.h	…
ufs-qcom.c	scsi: ufs: ufs-qcom: Fix race conditions caused by ufs_qcom_testbus_config()	2020-10-29 09:58:09 +01:00
ufs-qcom.h	…
ufs-sysfs.c	…
ufs-sysfs.h	…
ufs.h	…
ufs_bsg.c	…
ufs_bsg.h	…
ufs_quirks.h	…
ufshcd-dwc.c	…
ufshcd-dwc.h	…
ufshcd-pci.c	…
ufshcd-pltfrm.c	…
ufshcd-pltfrm.h	…
ufshcd.c	scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE	2020-12-16 10:56:56 +01:00
ufshcd.h	…
ufshci-dwc.h	…
ufshci.h	…
unipro.h	…