4.14-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
[ Upstream commit d5b9653dd2bb7a2b1c8cc783c5d3b607bbb6b271 ]
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 johan@kernel.org Reviewed-by: Vladimir Zapolskiy vladimir_zapolskiy@mentor.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/misc/sram.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)
--- a/drivers/misc/sram.c +++ b/drivers/misc/sram.c @@ -391,23 +391,23 @@ static int sram_probe(struct platform_de 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_de
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; }