[PATCH] ata: ahci_brcm: fix reset refcount leak in brcm_ahci_resume()

[Wentao Liang]

When brcm_ahci_resume() succeeds with reset_control_reset(), any
subsequent failure in ahci_platform_enable_clks(),
ahci_platform_enable_regulators(), ahci_platform_enable_phys(),
or ahci_platform_resume_host() leaves the shared reset line's
triggered_count incremented by one. On the next attempt to reset
the hardware, atomic_inc_return() sees a count greater than one
and the reset is silently skipped, potentially causing data
corruption or device malfunction.

Add a reset_control_rearm() call in the common error path after
brcm_sata_phys_disable() and ahci_platform_disable_regulators()
to properly balance the triggered_count, matching what the probe
error path already does.

Fixes: c0cdf2ac4b5b ("ata: ahci_brcm: Fix AHCI resources management")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/ata/ahci_brcm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 29be74fedcf0..38c63d73d210 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -415,6 +415,7 @@ static int __maybe_unused brcm_ahci_resume(struct device *dev)
 out_disable_phys:
 	brcm_sata_phys_disable(priv);
 	ahci_platform_disable_regulators(hpriv);
+	reset_control_rearm(priv->rcdev_rescal);
 out_disable_clks:
 	ahci_platform_disable_clks(hpriv);
 	return ret;
-- 
2.34.1