Currently we have no way to assign tty->port while performing tty
installation. There are two ways to provide the link tty_struct =>
tty_port. Either by calling tty_port_install from tty->ops->install or
tty_port_register_device called instead of tty_register_device when
the device is being set up after connected.
In this patch we modify most of the drivers to do the latter. When the
drivers use tty_register_device and we have tty_port already, we
switch to tty_port_register_device. So we have the tty_struct =>
tty_port link for free for those.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use the ANSI/VITA 4.0-1995 (S2011) naming convention for the mezzanine or
daughter boards. They are called IP modules in the Standard.
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Initialize the device when registering it. Sometimes the user access to it
and the device is in an unknown state, so it could fail.
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
After opening and closing the file /dev/ipoctal.X.Y.Z for the second time, it
gives a kernel oops due to a dereference of a NULL pointer.
The problem was that tty->driver_data was not properly initialized when
accessing the file for the second time.
Reported-by: Alberto Garcia Gonzalez <agarcia@igalia.com>
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The IRQ vector should be saved in MEM space base address according to the
datasheet.
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the rest of the code, the data is protected with spin_lock_irqsave().
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The buffer[][] field was replaced by tty_port->xmit_buf field but there was
some places that "buffer" was still accessed, giving a kernel oops because
it was uninitialized.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As we have already got rid of sysfs files in the tpci200 driver, it is needed
to delete that mention in the TODO file.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As there is no pr_* function used here, pr_fmt is not needed.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use DEFINE_PCI_DEVICE_TABLE() to create the device table and add
MODULE_DEVICE_TABLE() to export it.
Signed-off-by: Miguel Gómez <magomez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the error_flag field from the ipoctal structure, as the error code
is handled through the tty abstraction. Remove the values definition as well.
Signed-off-by: Miguel Gómez <magomez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The configuration of the communication channel is handled by the tty
abstraction, so the ipoctal_config structure has become useless and it's
only used to store values that are never accesed. Remove it.
Signed-off-by: Miguel Gómez <magomez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the gotos when handling error conditions, as the code gets clearer
and the gotos are not really avoiding code replication.
Signed-off-by: Miguel Gómez <magomez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the "out" label from tpci200_request_irq(), as it can directly return
the error code instead of jumping.
Signed-off-by: Miguel Gómez <magomez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the "out" label from tpci200_slot_map_space(), as it can directly return
the error code instead of jumping.
Signed-off-by: Miguel Gómez <magomez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When uninstalling a device, the call to the ipack_bus_ops remove() frees
resources in the ipack device driver but without unregistering the device.
It generates a kernel oops when somebody wants to unregister the device.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tpci200->info is used later when uninstalling the module. As there is another
kfree in the proper place, this patch removes the wrong one.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When uninstalling a device, there is a loop of calls that produces, at the end,
two calls to __ipoctal_remove() function with the same ipack_device argument.
The first time works fine, but the second will fail in tty_unregister_driver()
To avoid this situation, the call to __ipoctal_remove() it is done only from the
ipack bus driver and not from the ipack device driver.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When a bus driver calls ipack_driver_register(), it should manages the returning
NULL value to undo all the operations it did before this call, and print the
corresponding trace.
It is not a task for the ipack driver to call the remove() function here.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use idr interface to give the bus number. That way, we remove the
limitation of 64 buses.
The mutex is removed because the ida interface uses spinlocks inside, so it is
not needed an extra lock.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When ipack_device_register() is called, the variable
tpci200->slots[dev->slot].dev has not assigned a value and it gives an error
when the mezzanine driver is reading a register from the board for the match()
function, as all the I/O functions call check_slot().
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This field is not needed at all, as the IRQ is registered for the carrier not
for the mezzanine.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To avoid a dereference of a NULL pointer, the availability of the function is
checked before its use.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tpci200_slot_map_space() should return 0 if the operation was properly
done. If not, the caller will think that something wrong happened.
This patch establish the returned value to 0. It is overwritten in case of
error.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tpci200_slot_unmap_space() should return 0 if the operation was properly done. If
not, the caller will think that something wrong happened.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It should return the same value given by the match function of the ipack_driver
that has been called.
Returning 0 here, means that the match has failed and it could be succeed.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To perform the installation of a mezzanine it was needed to write on these
files, now it is not needed at all as the device model is properly implemented.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Removed TPCI200_SHORTNAME. For the pr_* the name of the module is already
included due to pr_fmt declaration.
In other cases, KBUILD_MODNAME is used instead.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Removed board_name and bus_name fields from struct ipack_device that are
completely useless.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
It adds and removes some fields in the struct ipack_device and
ipack_bus_device to make it cleaner.
The API has change to group all the operations on these structures inside
of the ipack driver.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change the licence to explicitly GPLv2 to avoid possible conflicts in the
future.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change the licence to explicitly GPLv2 to avoid possible conflicts in the
future.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change the licence to explicitly GPLv2 to avoid possible conflicts in the
future.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Added myself in the TODO file.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Maintain the proper order of definitions in Kconfig following the time order of
the commits.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We free "dev" then dereference it on the next line.
Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jiri Slaby