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s390/tape: Remove extra CCW allocation for error recovery 

The Read Opposite error recovery code required 2 extra CCWs to be
allocated in order to transform the request. As this error recovery code
for both 34xx and 3590 was removed the additional allocation isn't
required anymore. Reduce it to two.

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>
This commit is contained in:
Jan Höppner 2025-10-16 09:47:14 +02:00 committed by Heiko Carstens
parent a984d71277
commit 83cff1b124
1 changed files with 1 additions and 5 deletions
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6
drivers/s390/char/tape_std.c
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@ -645,11 +645,7 @@ tape_std_read_block(struct tape_device *device)
{
struct tape_request *request;
/*
* We have to alloc 4 ccws in order to be able to transform request
* into a read backward request in error case.
*/
request = tape_alloc_request(4, 0);
request = tape_alloc_request(2, 0);
if (IS_ERR(request)) {
DBF_EXCEPTION(6, "xrbl fail");
return request;