linux-kernel - [PATCH] gnss: sirf: fix activation retry handling

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Date:   Wed,  5 Dec 2018 11:21:49 +0100
From:   Johan Hovold <johan@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Andreas Kemnade <andreas@...nade.info>,
        Johan Hovold <johan@...nel.org>,
        stable <stable@...r.kernel.org>
Subject: [PATCH] gnss: sirf: fix activation retry handling

Fix activation helper which would return -ETIMEDOUT even if the last
retry attempt was successful.

Also change the semantics of the retries variable so that it actually
holds the number of retries (rather than tries).

Fixes: d2efbbd18b1e ("gnss: add driver for sirfstar-based receivers")
Cc: stable <stable@...r.kernel.org>	# 4.19
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/gnss/sirf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gnss/sirf.c b/drivers/gnss/sirf.c
index 71d014edd167..2c22836d3ffd 100644
--- a/drivers/gnss/sirf.c
+++ b/drivers/gnss/sirf.c
@@ -168,7 +168,7 @@ static int sirf_set_active(struct sirf_data *data, bool active)
 	else
 		timeout = SIRF_HIBERNATE_TIMEOUT;
 
-	while (retries-- > 0) {
+	do {
 		sirf_pulse_on_off(data);
 		ret = sirf_wait_for_power_state(data, active, timeout);
 		if (ret < 0) {
@@ -179,9 +179,9 @@ static int sirf_set_active(struct sirf_data *data, bool active)
 		}
 
 		break;
-	}
+	} while (retries--);
 
-	if (retries == 0)
+	if (retries < 0)
 		return -ETIMEDOUT;
 
 	return 0;
-- 
2.19.2