s390/dasd: Return BLK_STS_INVAL for EINVAL from do_dasd_request

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commit 8f4ed0ce48 upstream.

Currently, if CCW request creation fails with -EINVAL, the DASD driver
returns BLK_STS_IOERR to the block layer.

This can happen, for example, when a user-space application such as QEMU
passes a misaligned buffer, but the original cause of the error is
masked as a generic I/O error.

This patch changes the behavior so that -EINVAL is returned as
BLK_STS_INVAL, allowing user space to properly detect alignment issues
instead of interpreting them as I/O errors.

Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Cc: stable@vger.kernel.org #6.11+
Signed-off-by: Jaehoon Kim <jhkim@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Jaehoon Kim 2025-09-25 17:47:07 +02:00 • committed by Greg Kroah-Hartman

parent 4e6f98bf23

commit f84f57b777

1 changed files with 7 additions and 5 deletions

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drivers/s390/block/dasd.c

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