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dfu: dfu_sf: avoid double free of SPI device

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Multiple DFU entities may share the same SPI device. We must make sure that
the SPI device is only freed once.

When using the driver model it is not necessary to free the SPI device.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Heinrich Schuchardt 2021-03-18 07:46:07 +01:00
parent cbea241e93
commit 57cba225fa
1 changed files with 17 additions and 1 deletions
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18
drivers/dfu/dfu_sf.c
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@ -87,7 +87,23 @@ static unsigned int dfu_polltimeout_sf(struct dfu_entity *dfu)
static void dfu_free_entity_sf(struct dfu_entity *dfu)
{
spi_flash_free(dfu->data.sf.dev);
/*
* In the DM case it is not necessary to free the SPI device.
* For the non-DM case we must ensure that the the SPI device is only
* freed once.
*/
if (!CONFIG_IS_ENABLED(DM_SPI_FLASH)) {
struct spi_flash *dev = dfu->data.sf.dev;
if (!dev)
return;
dfu->data.sf.dev = NULL;
list_for_each_entry(dfu, &dfu_list, list) {
if (dfu->data.sf.dev == dev)
dfu->data.sf.dev = NULL;
}
spi_flash_free(dev);
}
}
static struct spi_flash *parse_dev(char *devstr)