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From: Peter Mamonov <pmamonov@gmail.com>
To: barebox@lists.infradead.org
Cc: Peter Mamonov <pmamonov@gmail.com>
Subject: [RFC v2 2/3] WIP: usb: ehci-hcd: use non-interruptible version of mdelay()
Date: Fri, 11 Sep 2015 20:27:55 +0300	[thread overview]
Message-ID: <1441992476-11703-3-git-send-email-pmamonov@gmail.com> (raw)
In-Reply-To: <1441992476-11703-1-git-send-email-pmamonov@gmail.com>

Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
---
 drivers/usb/host/ehci-hcd.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index c9bf703..3d89ec5 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -133,6 +133,14 @@ static struct descriptor {
 	},
 };
 
+static inline void mdelay_ni(unsigned long msecs)
+{
+	uint64_t start = get_time_ns();
+
+	while (!is_timeout_non_interruptible(start, msecs * MSECOND))
+		;
+}
+
 #define ehci_is_TDI()	(ehci->flags & EHCI_HAS_TT)
 
 static int handshake(uint32_t *ptr, uint32_t mask, uint32_t done, int usec)
@@ -673,7 +681,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 				 * root
 				 */
 				ehci_powerup_fixup(ehci);
-				mdelay(50);
+				mdelay_ni(50);
 				ehci->portreset |= 1 << port;
 				/* terminate the reset */
 				ehci_writel(status_reg, reg & ~EHCI_PS_PR);
@@ -736,7 +744,7 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 		goto unknown;
 	}
 
-	mdelay(1);
+	mdelay_ni(1);
 	len = min3(srclen, (int)le16_to_cpu(req->length), length);
 	if (srcptr != NULL && len > 0)
 		memcpy(buffer, srcptr, len);
-- 
2.1.4


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  parent reply	other threads:[~2015-09-11 17:26 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-11 17:27 [RFC v2 0/3] WIP: add usb keyboard driver Peter Mamonov
2015-09-11 17:27 ` [RFC v2 1/3] usb: ehci-hcd: port periodic transactions implementation from the u-boot Peter Mamonov
2015-09-14  6:21   ` Sascha Hauer
2015-09-11 17:27 ` Peter Mamonov [this message]
2015-09-14  6:27   ` [RFC v2 2/3] WIP: usb: ehci-hcd: use non-interruptible version of mdelay() Sascha Hauer
2015-09-11 17:27 ` [RFC v2 3/3] input: port usb keyboard driver from the u-boot Peter Mamonov

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