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greybus: don't assume subdevs are valid
Most of the disconnect routines for the "subdevs" of a module blindly assume that initialization of the subdev was successful. Fix this by checking for null pointers. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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8fd39e3dcb
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051fb04712
4 changed files with 9 additions and 1 deletions
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@ -135,6 +135,8 @@ void gb_battery_disconnect(struct gb_module *gmod)
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struct gb_battery *gb;
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gb = gmod->gb_battery;
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if (!gb)
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return;
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power_supply_unregister(&gb->bat);
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@ -92,6 +92,8 @@ void gb_gpio_disconnect(struct gb_module *gmod)
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int retval;
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gb_gpio_dev = gmod->gb_gpio_dev;
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if (!gb_gpio_dev)
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return;
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retval = gpiochip_remove(&gb_gpio_dev->chip);
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kfree(gb_gpio_dev);
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@ -121,6 +121,8 @@ void gb_i2c_disconnect(struct gb_module *gmod)
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struct gb_i2c_device *gb_i2c_dev;
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gb_i2c_dev = gmod->gb_i2c_dev;
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if (!gb_i2c_dev)
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return;
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i2c_del_adapter(gb_i2c_dev->adapter);
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kfree(gb_i2c_dev->adapter);
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kfree(gb_i2c_dev);
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@ -71,8 +71,10 @@ void gb_sdio_disconnect(struct gb_module *gmod)
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struct gb_sdio_host *host;
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host = gmod->gb_sdio_host;
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mmc = host->mmc;
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if (!host)
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return;
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mmc = host->mmc;
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mmc_remove_host(mmc);
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mmc_free_host(mmc);
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}
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