linux-kernel - [PATCH 06/19] thunderbolt: Wait a bit longer for ICM to authenticate the active NVM

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Message-Id: <20180319162703.5331-7-mika.westerberg@linux.intel.com>
Date:   Mon, 19 Mar 2018 19:26:50 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <yehezkel.bernat@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 06/19] thunderbolt: Wait a bit longer for ICM to authenticate the active NVM

Sometimes during cold boot ICM has not yet authenticated the active NVM
image leading to timeout and failing the driver probe. Allow ICM to take
some more time and increase the timeout to 3 seconds before we give up.

While there fix icm_firmware_init() to return the real error code
without overwriting it with -ENODEV.

Fixes: f67cf491175a ("thunderbolt: Add support for Internal Connection Manager (ICM)")
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: stable@...r.kernel.org
---
 drivers/thunderbolt/icm.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c
index 1183321586c5..611d28e8e5f2 100644
--- a/drivers/thunderbolt/icm.c
+++ b/drivers/thunderbolt/icm.c
@@ -736,14 +736,14 @@ static bool icm_ar_is_supported(struct tb *tb)
 static int icm_ar_get_mode(struct tb *tb)
 {
 	struct tb_nhi *nhi = tb->nhi;
-	int retries = 5;
+	int retries = 60;
 	u32 val;
 
 	do {
 		val = ioread32(nhi->iobase + REG_FW_STS);
 		if (val & REG_FW_STS_NVM_AUTH_DONE)
 			break;
-		msleep(30);
+		msleep(50);
 	} while (--retries);
 
 	if (!retries) {
@@ -1063,6 +1063,9 @@ static int icm_firmware_init(struct tb *tb)
 			break;
 
 		default:
+			if (ret < 0)
+				return ret;
+
 			tb_err(tb, "ICM firmware is in wrong mode: %u\n", ret);
 			return -ENODEV;
 		}
-- 
2.16.2