kernel/linux.git/drivers/tty/serial/uartlite.c, branch v4.4.239

serial: uartlite: fix exit path null pointer

2019-10-17T20:41:00+00:00

commit a553add0846f355a28ed4e81134012e4a1e280c2 upstream. Call uart_unregister_driver() conditionally instead of unconditionally, only if it has been previously registered. This uses driver.state, just as the sh-sci.c driver does. Fixes this null pointer dereference in tty_unregister_driver(), since the 'driver' argument is null: general protection fault: 0000 [#1] PREEMPT SMP KASAN PTI RIP: 0010:tty_unregister_driver+0x25/0x1d0 Fixes: 238b8721a554 ("[PATCH] serial uartlite driver") Signed-off-by: Randy Dunlap Cc: stable Cc: Peter Korsgaard Link: https://lore.kernel.org/r/9c8e6581-6fcc-a595-0897-4d90f5d710df@infradead.org Signed-off-by: Greg Kroah-Hartman

serial: xilinx: Use platform_get_irq to get irq description structure

2015-04-28T12:26:21+00:00

For systems with CONFIG_SERIAL_OF_PLATFORM=y and device_type = "serial"; property in DT of_serial.c driver maps and unmaps IRQ (because driver probe fails). Then a driver is called but irq mapping is not created that's why driver is failing again in again on request_irq(). Based on this use platform_get_irq() instead of platform_get_resource() which is doing irq_desc allocation and driver itself can request IRQ. Fix both xilinx serial drivers in the tree. Signed-off-by: Michal Simek CC: Signed-off-by: Greg Kroah-Hartman

tty: constify of_device_id array

2015-03-26T21:49:10+00:00

of_device_id is always used as const. (See driver.of_match_table and open firmware functions) Signed-off-by: Fabian Frederick Acked-by: Peter Korsgaard Acked-by: Timur Tabi Acked-by: Patrice Chotard Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Remove .owner field for driver

2014-09-08T23:09:13+00:00

There is no need to init .owner field. Based on the patch from Peter Griffin "mmc: remove .owner field for drivers using module_platform_driver" This patch removes the superflous .owner field for drivers which use the module_platform_driver API, as this is overriden in platform_driver_register anyway." Signed-off-by: Michal Simek Acked-by: Peter Korsgaard Signed-off-by: Greg Kroah-Hartman

serial: treewide: Remove empty implementations of enable_ms()

2014-07-10T00:29:38+00:00

Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Specify time for sending chars

2014-05-28T19:24:31+00:00

Xilinx MDM (Microblaze Debug Module) also contains uart interface via JTAG which is compatible with uartlite driver. This interface is really slow that's why timeout is setup to 1s. Make this time delay not to be cpu speed dependent. Signed-off-by: Michal Simek Acked-by: Peter Korsgaard Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Support uartlite on big and little endian systems

2013-02-13T16:38:45+00:00

Use big and little endian accessors function to reflect system configuration. Detection is done via control register in ulite_request_port. Tested on Microblaze LE, BE, PPC440 and Arm zynq. Signed-off-by: Michal Simek Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman

tty: serial: uartlite: Fix sparse and checkpatch warnings

2013-02-13T16:38:45+00:00

Clean coding style and sparse warnings. Signed-off-by: Michal Simek Signed-off-by: Greg Kroah-Hartman

TTY: switch tty_flip_buffer_push

2013-01-16T06:30:15+00:00

Now, we start converting tty buffer functions to actually use tty_port. This will allow us to get rid of the need of tty in many call sites. Only tty_port will needed and hence no more tty_port_tty_get in those paths. Now, the one where most of tty_port_tty_get gets removed: tty_flip_buffer_push. IOW we also closed all the races in drivers not using tty_port_tty_get at all yet. Also we move tty_flip_buffer_push declaration from include/linux/tty.h to include/linux/tty_flip.h to all others while we are changing it anyway. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman

TTY: switch tty_insert_flip_char

2013-01-16T06:21:36+00:00

Now, we start converting tty buffer functions to actually use tty_port. This will allow us to get rid of the need of tty in many call sites. Only tty_port will needed and hence no more tty_port_tty_get in those paths. tty_insert_flip_char is the next one to proceed. This one is used all over the code, so the patch is huge. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman