From d5b9653dd2bb7a2b1c8cc783c5d3b607bbb6b271 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 3 Jul 2018 12:05:48 +0200 Subject: [PATCH] misc: sram: enable clock before registering regions Make sure to enable the clock before registering regions and exporting partitions to user space at which point we must be prepared for I/O. Fixes: ee895ccdf776 ("misc: sram: fix enabled clock leak on error path") Signed-off-by: Johan Hovold Reviewed-by: Vladimir Zapolskiy Signed-off-by: Greg Kroah-Hartman --- drivers/misc/sram.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c index 679647713e36..74b183baf044 100644 --- a/drivers/misc/sram.c +++ b/drivers/misc/sram.c @@ -391,23 +391,23 @@ static int sram_probe(struct platform_device *pdev) if (IS_ERR(sram->pool)) return PTR_ERR(sram->pool); - ret = sram_reserve_regions(sram, res); - if (ret) - return ret; - sram->clk = devm_clk_get(sram->dev, NULL); if (IS_ERR(sram->clk)) sram->clk = NULL; else clk_prepare_enable(sram->clk); + ret = sram_reserve_regions(sram, res); + if (ret) + goto err_disable_clk; + platform_set_drvdata(pdev, sram); init_func = of_device_get_match_data(&pdev->dev); if (init_func) { ret = init_func(); if (ret) - goto err_disable_clk; + goto err_free_partitions; } dev_dbg(sram->dev, "SRAM pool: %zu KiB @ 0x%p\n", @@ -415,10 +415,11 @@ static int sram_probe(struct platform_device *pdev) return 0; +err_free_partitions: + sram_free_partitions(sram); err_disable_clk: if (sram->clk) clk_disable_unprepare(sram->clk); - sram_free_partitions(sram); return ret; }