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mmc: meson-mx-sdio: check devm_kasprintf for failure 

devm_kasprintf() may return NULL on failure of internal allocation thus
the assignments to  init.name  are not safe if not checked. On error
meson_mx_mmc_register_clks() returns negative values so -ENOMEM in the
(unlikely) failure case of devm_kasprintf() should be fine here.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: ed80a13bb4 ("mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs")
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Nicholas Mc Guire 2018-11-22 10:35:19 +01:00 committed by Ulf Hansson
parent 48e304cc19
commit b0d06f1cb0
1 changed files with 6 additions and 0 deletions
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6
drivers/mmc/host/meson-mx-sdio.c
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@ -596,6 +596,9 @@ static int meson_mx_mmc_register_clks(struct meson_mx_mmc_host *host)
init.name = devm_kasprintf(host->controller_dev, GFP_KERNEL,
"%s#fixed_factor",
dev_name(host->controller_dev));
if (!init.name)
return -ENOMEM;
init.ops = &clk_fixed_factor_ops;
init.flags = 0;
init.parent_names = &clk_fixed_factor_parent;
@ -612,6 +615,9 @@ static int meson_mx_mmc_register_clks(struct meson_mx_mmc_host *host)
clk_div_parent = __clk_get_name(host->fixed_factor_clk);
init.name = devm_kasprintf(host->controller_dev, GFP_KERNEL,
"%s#div", dev_name(host->controller_dev));
if (!init.name)
return -ENOMEM;
init.ops = &clk_divider_ops;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = &clk_div_parent;