kernel/git/stable/linux.git/drivers/s390/char, branch linux-3.15.y

s390/sclp_cmd: replace PTR_RET with PTR_ERR_OR_ZERO

2014-04-11T11:53:42+00:00

PTR_RET is deprecated. Do not recommend its usage anymore. Use PTR_ERR_OR_ZERO instead. Signed-off-by: Duan Jiong Signed-off-by: Martin Schwidefsky

s390/sclp: replace PTR_RET with PTR_ERR_OR_ZERO

2014-04-11T11:53:40+00:00

PTR_RET is deprecated. Do not recommend its usage anymore. Use PTR_ERR_OR_ZERO instead. Signed-off-by: Duan Jiong Signed-off-by: Martin Schwidefsky

s390/sclp_vt220: Fix kernel panic due to early terminal input

2014-04-11T11:53:38+00:00

A kernel panic might occur when there is terminal input available via the SCLP VT220 interface at an early time during the boot process. The processing of terminal input requires prior initialization which is done via an early_initcall function (init_workqueues) while the SCLP VT220 driver registers for terminal input during a console_initcall function (sclp_vt220_con_init). When there is terminal input available via the SCLP interface between console_initcall and early_initcall, a null pointer dereference occurs (system_wq is null). Fix this problem by moving the registration for terminal input to a device_initcall function (sclp_vt220_tty_init). Reported-by: Christian Borntraeger Tested-by: Christian Borntraeger Signed-off-by: Peter Oberparleiter Signed-off-by: Martin Schwidefsky

s390/irq: Use defines for external interruption codes

2014-04-03T12:30:52+00:00

Use the new defines for external interruption codes to get rid of "magic" numbers in the s390 source code. And while we're at it, also rename the (un-)register_external_interrupt function to something shorter so that this patch does not exceed the 80 columns all over the place. Signed-off-by: Thomas Huth Signed-off-by: Martin Schwidefsky

s390/sclp: add timeout for queued requests

2014-04-01T11:25:26+00:00

This patch adds a timeout option for queued requests and introduces sclp_sync_request_timeout() to use this timer. With this, blocking the system too long, e.g. during an SE reboot, can be avoided in critical situations like CPU and memory hotplug. Since there is no way to cancel a running request, this timeout only applies to queued requests that have not yet been started. Reviewed-by: Peter Oberparleiter Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky

s390/tape: Add missing destroy_timer_on_stack()

2014-04-01T07:23:37+00:00

Otherwise we leak a tracking object when DEBUG_OBJECTS is enabled. Signed-off-by: Thomas Gleixner Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/tape: Use del_timer_sync()

2014-04-01T07:23:36+00:00

del_timer() does not wait for a possible running callback to complete. So the call side might free request and the associated objects while on another cpu the timer handler runs. Signed-off-by: Thomas Gleixner Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

s390/3270: fix crash with multiple reset device requests

2014-04-01T07:23:36+00:00

If the 3270 device is detached the initial reset device request will stays pending until the device is operational. A second reset device call will reuse the same request structure which will cause an oops. Add a check to see if the reset device request is already pending and do nothing in this case. Signed-off-by: Martin Schwidefsky

s390/con3270: optionally disable auto update

2014-03-26T09:55:33+00:00

This patch adds a parameter 'auto_update' to the con3270 driver, causing the 'auto_update' feature to be disabled if unset. The 'auto_update' feature will cause the con3270 driver to switch to the console view whenever new system messages are displayed, which makes working on the 3270 terminal awkward. Signed-off-by: Martin Schwidefsky

s390/smp: limit number of cpus in possible cpu mask

2014-03-17T14:53:06+00:00

Limit the number of bits to the maximum number of cpus a machine can have. possible_cpu_mask typically will have more bits set than a machine may physically have. This results in wasted memory during per-cpu memory allocations, if the possible mask contains more cpus than physically possible for a given configuration. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky