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misc: sram: fix resource leaks in probe error path 

commit f294d00961 upstream.

Make sure to disable clocks and deregister any exported partitions
before returning on late probe errors.

Note that since commit ee895ccdf7 ("misc: sram: fix enabled clock leak
on error path"), partitions are deliberately exported before enabling
the clock so we stick to that logic here. A follow up patch will address
this.

Cc: stable <stable@vger.kernel.org>     # 4.9
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Johan Hovold 2018-07-03 12:05:47 +02:00 committed by Greg Kroah-Hartman
parent 3620bc1ceb
commit 31e4f8ba01
1 changed files with 8 additions and 1 deletions
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9
drivers/misc/sram.c
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@ -407,13 +407,20 @@ static int sram_probe(struct platform_device *pdev)
if (init_func) {
ret = init_func();
if (ret)
return ret;
goto err_disable_clk;
}
dev_dbg(sram->dev, "SRAM pool: %zu KiB @ 0x%p\n",
gen_pool_size(sram->pool) / 1024, sram->virt_base);
return 0;
err_disable_clk:
if (sram->clk)
clk_disable_unprepare(sram->clk);
sram_free_partitions(sram);
return ret;
}
static int sram_remove(struct platform_device *pdev)