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wimax/i2400m: make i2400m->bus_dev_{stop,start}() optional

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In coming commits, the i2400m SDIO driver will not use
i2400m->bus_dev_stop().

Thus changed to check before calling, as an empty stub has more
overhead than a call to check if the function pointer is non-NULL.

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
This commit is contained in:
Inaky Perez-Gonzalez 2009-10-08 12:33:50 +09:00
parent 4a78fd9a73
commit 097acbeff9
2 changed files with 16 additions and 12 deletions
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14
drivers/net/wimax/i2400m/driver.c
View File

@ -384,9 +384,11 @@ retry:
dev_err(dev, "cannot create workqueue\n");
goto error_create_workqueue;
}
result = i2400m->bus_dev_start(i2400m);
if (result < 0)
goto error_bus_dev_start;
if (i2400m->bus_dev_start) {
result = i2400m->bus_dev_start(i2400m);
if (result < 0)
goto error_bus_dev_start;
}
i2400m->ready = 1;
wmb(); /* see i2400m->ready's documentation */
/* process pending reports from the device */
@ -413,7 +415,8 @@ error_check_mac_addr:
wmb(); /* see i2400m->ready's documentation */
flush_workqueue(i2400m->work_queue);
error_fw_check:
i2400m->bus_dev_stop(i2400m);
if (i2400m->bus_dev_stop)
i2400m->bus_dev_stop(i2400m);
error_bus_dev_start:
destroy_workqueue(i2400m->work_queue);
error_create_workqueue:
@ -480,7 +483,8 @@ void __i2400m_dev_stop(struct i2400m *i2400m)
wmb(); /* see i2400m->ready's documentation */
flush_workqueue(i2400m->work_queue);
i2400m->bus_dev_stop(i2400m);
if (i2400m->bus_dev_stop)
i2400m->bus_dev_stop(i2400m);
destroy_workqueue(i2400m->work_queue);
i2400m_rx_release(i2400m);
i2400m_tx_release(i2400m);

14
drivers/net/wimax/i2400m/i2400m.h
View File

@ -245,19 +245,19 @@ struct i2400m_barker_db;
* all the host resources created to handle communication with
* the device.
*
* @bus_dev_start: [fill] Function called by the bus-generic code
* [i2400m_dev_start()] to setup the bus-specific communications
* to the the device. See LIFE CYCLE above.
* @bus_dev_start: [optional fill] Function called by the bus-generic
* code [i2400m_dev_start()] to do things needed to start the
* device. See LIFE CYCLE above.
*
* NOTE: Doesn't need to upload the firmware, as that is taken
* care of by the bus-generic code.
*
* @bus_dev_stop: [fill] Function called by the bus-generic code
* [i2400m_dev_stop()] to shutdown the bus-specific communications
* to the the device. See LIFE CYCLE above.
* @bus_dev_stop: [optional fill] Function called by the bus-generic
* code [i2400m_dev_stop()] to do things needed for stopping the
* device. See LIFE CYCLE above.
*
* This function does not need to reset the device, just tear down
* all the host resources created to handle communication with
* all the host resources created to handle communication with
* the device.
*
* @bus_tx_kick: [fill] Function called by the bus-generic code to let