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mmc: Protect mmc_initialize from initialising mmc multiple times

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`mmc_initialize` might be called multiple times leading to the mmc-controllers
being initialised twice, and initialising the `mmc_devices` list head twice
which may lead to memory leaks.

Signed-off-by: Daniel Kochmański <dkochmanski@turtle-solutions.eu>
CC: Roy Spliet <r.spliet@ultimaker.com>
Cc: Ian Campbell <ijc@hellion.org.uk>
CC: Pantelis Antoniou <panto@antoniou-consulting.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Daniel Kochmański 2015-05-29 16:55:43 +02:00 committed by Hans de Goede
parent 413978d118
commit 1b26bab12e
1 changed files with 5 additions and 0 deletions
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5
drivers/mmc/mmc.c
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@ -1762,6 +1762,11 @@ static void do_preinit(void)
int mmc_initialize(bd_t *bis)
{
static int initialized = 0;
if (initialized) /* Avoid initializing mmc multiple times */
return 0;
initialized = 1;
INIT_LIST_HEAD (&mmc_devices);
cur_dev_num = 0;