When the user of a shared GPIO managed by gpio-shared-proxy calls
gpiod_put() to release it, we never undo the potential "vote" for
driving the shared line "high". In the free() callback, check if this
proxy voted for "high" and - if so - decrease the number of votes.

Note that we don't set the value back to "low" when the last user
releases the line in line with most GPIO drivers that leave the value
"as-is" in GPIO free() path.

Fixes: e992d54c6f97 ("gpio: shared-proxy: implement the shared GPIO proxy driver")
Closes: https://sashiko.dev/#/patchset/20260513-gpio-shared-dynamic-voting-v1-1-8e1c49961b7d%40oss.qualcomm.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
Sashiko commented on this pre-existing issue under my patch changing the
voting heuristic.
---
 drivers/gpio/gpio-shared-proxy.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpio/gpio-shared-proxy.c b/drivers/gpio/gpio-shared-proxy.c
index 29d7d2e4dfc02c34fb3f2abc343ee30b61579b66..0194371254bef6b6225611017e882cea1a7b92e9 100644
--- a/drivers/gpio/gpio-shared-proxy.c
+++ b/drivers/gpio/gpio-shared-proxy.c
@@ -108,6 +108,11 @@ static void gpio_shared_proxy_free(struct gpio_chip *gc, unsigned int offset)
 
 	proxy->shared_desc->usecnt--;
 
+	if (proxy->voted_high) {
+		proxy->voted_high = false;
+		proxy->shared_desc->highcnt--;
+	}
+
 	dev_dbg(proxy->dev, "Shared GPIO freed, number of users: %u\n",
 		proxy->shared_desc->usecnt);
 }

---
base-commit: 687da68900cd1a46549f7d9430c7d40346cb86a0
change-id: 20260520-gpio-shared-free-vote-f62333ab4fff

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>