From: Heiko Carstens <hca@linux.ibm.com>
Date: Tue, 21 Oct 2025 08:26:26 +0000 (+0200)
Subject: Merge branch 'tape-block-sizes'
X-Git-Tag: v6.19-rc1~206^2~35
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e09c0a03eb9a2710e42d2291751ed27e1b14f76;p=thirdparty%2Flinux.git

Merge branch 'tape-block-sizes'

Jan Höppner says:

====================

The tape device driver is limited to a block size of 65535 bytes since a
single CCW can only transfer up to 64K-1 bytes (The count field is a
16bit value). This series introduces data chaining for all read/write
functions to support block sizes larger than 65535.

The tape device type 3490 (emulated) and 3590/3592 can handle up to
256K. [1]

[1] https://www.ibm.com/docs/en/zos/3.1.0?topic=blksize-system-determined-block-size

====================

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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5e09c0a03eb9a2710e42d2291751ed27e1b14f76