| Message ID | 20230726134140.7180-3-quic_nitirawa@quicinc.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Fix hibern8 enter failure during host reset | expand |
On Wed, Jul 26, 2023 at 07:11:40PM +0530, Nitin Rawat wrote: > Commit <52a518019ca1> (Fix missing clk change notification) added UFS > clock scaling notification to ufshcd_host_reset_and_restore. This > invokes hibern8 enter and exit on qualcomm platform which fails because > controller is in reset state. > > Fix this by checking the Host controller state before sending > hibern8 command. > > __ufshcd_wl_resume() > ufshcd_reset_and_restore() > ufshcd_host_reset_and_restore() > ufshcd_scale_clks() > ufshcd_vops_clk_scale_notify() > ufs_qcom_clk_scale_notify() > ufshcd_uic_hibern8_enter() > > Fixes: 52a518019ca1 ("scsi: ufs: core: Fix missing clk change notification on host reset") > Nit: No need of a newline here. > Co-developed-by: Manish Pandey <quic_mapa@quicinc.com> > Signed-off-by: Manish Pandey <quic_mapa@quicinc.com> > Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> Acked-by: Manivannan Sadhasivam <mani@kernel.org> - Mani > --- > drivers/ufs/host/ufs-qcom.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c > index 8d6fd4c3324f..95412e98a598 100644 > --- a/drivers/ufs/host/ufs-qcom.c > +++ b/drivers/ufs/host/ufs-qcom.c > @@ -1254,6 +1254,10 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, > struct ufs_pa_layer_attr *dev_req_params = &host->dev_req_params; > int err = 0; > > + /* check the host controller state before sending hibern8 cmd */ > + if (!ufshcd_is_hba_active(hba)) > + return 0; > + > if (status == PRE_CHANGE) { > err = ufshcd_uic_hibern8_enter(hba); > if (err) > -- > 2.17.1 >
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 8d6fd4c3324f..95412e98a598 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1254,6 +1254,10 @@ static int ufs_qcom_clk_scale_notify(struct ufs_hba *hba, struct ufs_pa_layer_attr *dev_req_params = &host->dev_req_params; int err = 0; + /* check the host controller state before sending hibern8 cmd */ + if (!ufshcd_is_hba_active(hba)) + return 0; + if (status == PRE_CHANGE) { err = ufshcd_uic_hibern8_enter(hba); if (err)
Commit <52a518019ca1> (Fix missing clk change notification) added UFS clock scaling notification to ufshcd_host_reset_and_restore. This invokes hibern8 enter and exit on qualcomm platform which fails because controller is in reset state. Fix this by checking the Host controller state before sending hibern8 command. __ufshcd_wl_resume() ufshcd_reset_and_restore() ufshcd_host_reset_and_restore() ufshcd_scale_clks() ufshcd_vops_clk_scale_notify() ufs_qcom_clk_scale_notify() ufshcd_uic_hibern8_enter() Fixes: 52a518019ca1 ("scsi: ufs: core: Fix missing clk change notification on host reset") Co-developed-by: Manish Pandey <quic_mapa@quicinc.com> Signed-off-by: Manish Pandey <quic_mapa@quicinc.com> Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> --- drivers/ufs/host/ufs-qcom.c | 4 ++++ 1 file changed, 4 insertions(+) -- 2.17.1