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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-05-02 14:53:29 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-05-04 16:29:53 +0200 |
| commit | 8340ab60b3624386eaa24fa21bdb4e6775066ccf (patch) | |
| tree | d0e7952f4a44d6733e448006f8a8fc442f1c08c5 /drivers/s390/char/raw3270.h | |
| parent | 2e63a3a66655d5fe5d85c090b009979870436c00 (diff) | |
| download | linux-8340ab60b3624386eaa24fa21bdb4e6775066ccf.tar.bz2 | |
s390/3270: avoid endless I/O loop with disconnected 3270 terminals
If a 3270 terminal is disconnected while the tty view is active
the 3270 driver goes into an endless loop of failed I/O requests
until the terminal is connected again.
Add code to the raw3270 interrupt handler to check for unit checks
due to failed I/O requests and put the device to sleep with the
RAW3270_FLAGS_BUSY flag until a unsolicited device end interrupt
indicates that the device can be used again. while we are at it
simplify the 3270 irq handling and remove unnecessary code.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/raw3270.h')
| -rw-r--r-- | drivers/s390/char/raw3270.h | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h index e1e41c2861fb..56519cbb165c 100644 --- a/drivers/s390/char/raw3270.h +++ b/drivers/s390/char/raw3270.h @@ -125,19 +125,13 @@ raw3270_request_final(struct raw3270_request *rq) void raw3270_buffer_address(struct raw3270 *, char *, unsigned short); -/* Return value of *intv (see raw3270_fn below) can be one of the following: */ -#define RAW3270_IO_DONE 0 /* request finished */ -#define RAW3270_IO_BUSY 1 /* request still active */ -#define RAW3270_IO_RETRY 2 /* retry current request */ -#define RAW3270_IO_STOP 3 /* kill current request */ - /* * Functions of a 3270 view. */ struct raw3270_fn { int (*activate)(struct raw3270_view *); void (*deactivate)(struct raw3270_view *); - int (*intv)(struct raw3270_view *, + void (*intv)(struct raw3270_view *, struct raw3270_request *, struct irb *); void (*release)(struct raw3270_view *); void (*free)(struct raw3270_view *); |