s390/tape: Move idal allocation to core functions

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Currently tapechar_check_idalbuffer() is part of tape_char.c and is used
to ensure the idal buffer is big enough for the requested I/O and
reallocates a new one if required. The same is done in tape_std.c when a
fixed block size is set using the mtsetblk command. This is essentially
duplicate code.

The allocation of the buffer that is required for I/O can be considered
core functionality. Move the idal buffer allocation to tape_core.c,
make it generally available, and reduce code duplication.

Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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This commit is contained in:

Jan Höppner 2025-10-16 09:47:16 +02:00 • committed by Heiko Carstens

parent e039400f75

commit a5e2ca22c1

4 changed files with 35 additions and 47 deletions

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1

drivers/s390/char/tape.h

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31

drivers/s390/char/tape_char.c

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28

drivers/s390/char/tape_core.c

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22

drivers/s390/char/tape_std.c

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