]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
serial: of-serial: Remove device_type = "serial" registration
authorMichal Simek <michal.simek@xilinx.com>
Tue, 14 Apr 2015 10:03:09 +0000 (12:03 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 28 Apr 2015 12:27:38 +0000 (14:27 +0200)
commit6befa9d883385c580369a2cc9e53fbf329771f6d
tree07fb89e45b32cfb2fd4dd513709dd5e353fc5d56
parent5c90c07b98c02198d9777a7c4f3047b0a94bf7ed
serial: of-serial: Remove device_type = "serial" registration

Do not probe all serial drivers by of_serial.c which are using
device_type = "serial"; property. Only drivers which have valid
compatible strings listed in the driver should be probed.

When PORT_UNKNOWN is setup probe will fail anyway.

Arnd quotation about driver historical background:
"when I wrote that driver initially, the idea was that it would
get used as a stub to hook up all other serial drivers but after
that, the common code learned to create platform devices from DT"

This patch fix the problem with on the system with xilinx_uartps and
16550a where of_serial failed to register for xilinx_uartps and because
of irq_dispose_mapping() removed irq_desc. Then when xilinx_uartps was asking
for irq with request_irq() EINVAL is returned.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
CC: <stable@vger.kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/of_serial.c