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hw/i2c/pmbus_device: Fix modifying QOM class internals from instance

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QOM object instance should not modify its class state (because
all other objects instanciated from this class get affected).

Instead of modifying the PMBusDeviceClass 'device_num_pages' field
the first time a instance is initialized (in pmbus_pages_alloc),
introduce a new pmbus_pages_num() helper which returns the page
number from the class without modifying the class state.

The code logic become slighly simplified.

Inspired-by: Bernhard Beschow <shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230523064408.57941-4-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2023-05-12 10:20:52 +02:00
parent 0773885236
commit f0e4588fd4
1 changed files with 10 additions and 7 deletions
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17
hw/i2c/pmbus_device.c
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@ -190,15 +190,18 @@ static void pmbus_quick_cmd(SMBusDevice *smd, uint8_t read)
}
}
static uint8_t pmbus_pages_num(PMBusDevice *pmdev)
{
const PMBusDeviceClass *k = PMBUS_DEVICE_GET_CLASS(pmdev);
/* some PMBus devices don't use the PAGE command, so they get 1 page */
return k->device_num_pages ? : 1;
}
static void pmbus_pages_alloc(PMBusDevice *pmdev)
{
/* some PMBus devices don't use the PAGE command, so they get 1 page */
PMBusDeviceClass *k = PMBUS_DEVICE_GET_CLASS(pmdev);
if (k->device_num_pages == 0) {
k->device_num_pages = 1;
}
pmdev->num_pages = k->device_num_pages;
pmdev->pages = g_new0(PMBusPage, k->device_num_pages);
pmdev->num_pages = pmbus_pages_num(pmdev);
pmdev->pages = g_new0(PMBusPage, pmdev->num_pages);
}
void pmbus_check_limits(PMBusDevice *pmdev)