[PATCH v3 4.19.y-cip 10/17] spi: spi-mem: fix reference leak in spi_mem_access_start

Lad Prabhakar

From: Zhang Qilong <zhangqilong3@...>

commit c02bb16b0e826bf0e19aa42c3ae60ea339f32cf5 upstream.

pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to pm_runtime_put_noidle will result in
reference leak in spi_mem_access_start, so we should fix it.

Fixes: f86c24f479530 ("spi: spi-mem: Split spi_mem_exec_op() code")
Signed-off-by: Zhang Qilong <zhangqilong3@...>
Link: https://lore.kernel.org/r/20201103140910.3482-1-zhangqilong3@huawei.com
Signed-off-by: Mark Brown <broonie@...>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...>
drivers/spi/spi-mem.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 0908f979f6a8..2607981d973d 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -228,6 +228,7 @@ static int spi_mem_access_start(struct spi_mem *mem)

ret = pm_runtime_get_sync(ctlr->dev.parent);
if (ret < 0) {
+ pm_runtime_put_noidle(ctlr->dev.parent);
dev_err(&ctlr->dev, "Failed to power device: %d\n",
return ret;

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