From 266feefeb9ea2d846ac82eb6db1a54b230364ba4 Mon Sep 17 00:00:00 2001 From: Zhao Yakui Date: Tue, 26 Aug 2008 13:57:34 +0800 Subject: [PATCH] ACPI: Avoid bogus timeout about SMbus check MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit In the function of wait_transaction_complete when the timeout happens, OS will try to check the status of SMbus again. If the status is what OS expected, it will be regarded as the bogus timeout. Otherwise it will be treated as ETIME. http://bugzilla.kernel.org/show_bug.cgi?id=10483 Signed-off-by: Zhao Yakui tested-by : Oldřich Jedlička < Signed-off-by: Andi Kleen --- drivers/acpi/sbshc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c index bcf2c70fca87..a4e3767b8c64 100644 --- a/drivers/acpi/sbshc.c +++ b/drivers/acpi/sbshc.c @@ -107,6 +107,13 @@ static int wait_transaction_complete(struct acpi_smb_hc *hc, int timeout) if (wait_event_timeout(hc->wait, smb_check_done(hc), msecs_to_jiffies(timeout))) return 0; + /* + * After the timeout happens, OS will try to check the status of SMbus. + * If the status is what OS expected, it will be regarded as the bogus + * timeout. + */ + if (smb_check_done(hc)) + return 0; else return -ETIME; } -- 2.20.1