mtd: rawnand: gpmi: don't leak PM reference in error path

stable inclusion
from stable-v5.10.102
commit a4eeeaca50199e3f19eb13ac3b7e0bbb93e22de4
bugzilla: https://gitee.com/openeuler/kernel/issues/I567K6

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a4eeeaca50199e3f19eb13ac3b7e0bbb93e22de4

--------------------------------

commit 9161f365 upstream.

If gpmi_nfc_apply_timings() fails, the PM runtime usage counter must be
dropped.
Reported-by: NPavel Machek <pavel@denx.de>
Fixes: f53d4c10 ("mtd: rawnand: gpmi: Add ERR007117 protection for nfc_apply_timings")
Signed-off-by: NChristian Eggers <ceggers@arri.de>
Cc: stable@vger.kernel.org
Signed-off-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220125081619.6286-1-ceggers@arri.deSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYu Liao <liaoyu15@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c

@@ -2291,7 +2291,7 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
 		this->hw.must_apply_timings = false;
 		ret = gpmi_nfc_apply_timings(this);
 		if (ret)
-			return ret;
+			goto out_pm;
 	}
 
 	dev_dbg(this->dev, "%s: %d instructions\n", __func__, op->ninstrs);
@@ -2420,6 +2420,7 @@ static int gpmi_nfc_exec_op(struct nand_chip *chip,
 
 	this->bch = false;
 
+out_pm:
 	pm_runtime_mark_last_busy(this->dev);
 	pm_runtime_put_autosuspend(this->dev);