From: yangkai <yangkai@ubuntu-fs>
Date: Tue, 12 Jul 2011 06:29:42 +0000 (+0800)
Subject: modify a long time delay in irq disable when host enum
X-Git-Tag: firefly_0821_release~10136^2~15
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=eff4ff41bd3898d1f2067b6085b1d4da8f41b55c;p=firefly-linux-kernel-4.4.55.git

modify a long time delay in irq disable when host enum
---

diff --git a/drivers/usb/dwc_otg/dwc_otg_hcd.c b/drivers/usb/dwc_otg/dwc_otg_hcd.c
index 8ae2f504de2d..85752070ca36 100755
--- a/drivers/usb/dwc_otg/dwc_otg_hcd.c
+++ b/drivers/usb/dwc_otg/dwc_otg_hcd.c
@@ -625,7 +625,7 @@ static void reset_tasklet_func (unsigned long data)
 	dwc_otg_hcd_t *dwc_otg_hcd = (dwc_otg_hcd_t*)data;
 	dwc_otg_core_if_t *core_if = dwc_otg_hcd->core_if;
 	hprt0_data_t hprt0;
-
+    
 	DWC_DEBUGPL(DBG_HCDV, "USB RESET tasklet called\n");
 
 	hprt0.d32 = dwc_otg_read_hprt0 (core_if);
@@ -2522,8 +2522,13 @@ int dwc_otg_hcd_hub_control(struct usb_hcd *_hcd,
                                 hprt0.b.prtrst = 1;
                                 dwc_write_reg32(core_if->host_if->hprt0, hprt0.d32);
                         }
+            spin_unlock_irqrestore(&dwc_otg_hcd->global_lock, flags);
 			/* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
-			MDELAY (60);
+			// kever @rk 20110712
+			// can not use mdelay(60) while irq disable
+			//MDELAY (60);
+			msleep(60);
+            spin_lock_irqsave(&dwc_otg_hcd->global_lock, flags);
 			hprt0.b.prtrst = 0;
 			dwc_write_reg32(core_if->host_if->hprt0, hprt0.d32);
 			break;