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s390/dasd: remove superfluous virt_to_phys() conversion

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Only the last 12 bits of virtual / physical addresses are used when masking
with IDA_BLOCK_SIZE - 1. Given that the bits are the same regardless of
virtual or physical address, remove the virtual to physical address
conversion.

Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2024-03-07 13:28:10 +01:00
parent 8adc56b074
commit bdd0ab9750
1 changed files with 2 additions and 2 deletions
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4
drivers/s390/block/dasd_eckd.c
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@ -4259,7 +4259,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
* idaw ends
*/
if (!idaw_dst) {
if ((__u32)virt_to_phys(dst) & (IDA_BLOCK_SIZE - 1)) {
if ((unsigned long)(dst) & (IDA_BLOCK_SIZE - 1)) {
dasd_sfree_request(cqr, startdev);
return ERR_PTR(-ERANGE);
} else
@ -4279,7 +4279,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
* idal_create_words will handle cases where idaw_len
* is larger then IDA_BLOCK_SIZE
*/
if (!((__u32)virt_to_phys(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE - 1)))
if (!((unsigned long)(idaw_dst + idaw_len) & (IDA_BLOCK_SIZE - 1)))
end_idaw = 1;
/* We also need to end the idaw at track end */
if (!len_to_track_end) {