[PATCH] x86: increase timeout for EHCI debug port reset completion in early printk

[PATCH] x86: increase timeout for EHCI debug port reset completion in early printk

[Jan Beulich]

On one of my systems, several thousand iterations are needed before
CMD_RESET can be observed clear after setting it. Using a much higher
value here obviously cannot hurt.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>

---
 arch/x86/kernel/early_printk.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.31-rc8/arch/x86/kernel/early_printk.c	2009-06-10 05:05:27.000000000 +0200
+++ 2.6.31-rc8-x86-earlyprintk-dbgp-reset/arch/x86/kernel/early_printk.c	2009-09-02 12:13:01.000000000 +0200
@@ -624,7 +624,7 @@ try_next_port:
 		return -1;
 	}
 
-	loop = 10;
+	loop = 100000;
 	/* Reset the EHCI controller */
 	cmd = readl(&ehci_regs->command);
 	cmd |= CMD_RESET;

[tip:x86/urgent] x86: Increase timeout for EHCI debug port reset completion in early printk

[tip-bot for Jan Beulich]

Commit-ID:  414128bd33fef3242747154dfa444970bc5caf4c
Gitweb:     http://git.kernel.org/tip/414128bd33fef3242747154dfa444970bc5caf4c
Author:     Jan Beulich <JBeulich@novell.com>
AuthorDate: Fri, 4 Sep 2009 09:13:49 +0100
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Sun, 20 Sep 2009 20:23:37 +0200

x86: Increase timeout for EHCI debug port reset completion in early printk

On one of my systems, several thousand iterations are needed before
CMD_RESET can be observed clear after setting it. Using a much
higher value here obviously cannot hurt.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
LKML-Reference: <4AA0E85D02000078000136F9@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
 arch/x86/kernel/early_printk.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index 335f049..b11cab3 100644
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -624,7 +624,7 @@ try_next_port:
 		return -1;
 	}
 
-	loop = 10;
+	loop = 100000;
 	/* Reset the EHCI controller */
 	cmd = readl(&ehci_regs->command);
 	cmd |= CMD_RESET;