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| author | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2020-03-26 16:58:00 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-03-26 17:28:18 +0100 |
| commit | 33531001364d32a79b34da2dd4089715384d0968 (patch) | |
| tree | d56781320975c419832030408fb0c7a563aa352d /drivers/ata | |
| parent | sata_promise: use ata_cable_sata() (diff) | |
| download | linux-33531001364d32a79b34da2dd4089715384d0968.tar.xz linux-33531001364d32a79b34da2dd4089715384d0968.zip | |
ata: simplify ata_scsiop_inq_89()
Initialize rbuf[] directly instead of using ata_tf_to_fis(). This
results in simpler and smaller code. It also allows separating
ata_tf_to_fis() into SATA specific libata part in the future.
Code size savings on m68k arch using (modified) atari_defconfig:
text data bss dec hex filename
before:
20824 105 4096 25025 61c1 drivers/ata/libata-scsi.o
after:
20782 105 4096 24983 6197 drivers/ata/libata-scsi.o
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-scsi.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 005c6f2f7d21..0912acb82b80 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2357,10 +2357,6 @@ static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf) */ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) { - struct ata_taskfile tf; - - memset(&tf, 0, sizeof(tf)); - rbuf[1] = 0x89; /* our page code */ rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */ rbuf[3] = (0x238 & 0xff); @@ -2369,14 +2365,14 @@ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf) memcpy(&rbuf[16], "libata ", 16); memcpy(&rbuf[32], DRV_VERSION, 4); - /* we don't store the ATA device signature, so we fake it */ - - tf.command = ATA_DRDY; /* really, this is Status reg */ - tf.lbal = 0x1; - tf.nsect = 0x1; - - ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */ rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */ + rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */ + /* TODO: PMP? */ + + /* we don't store the ATA device signature, so we fake it */ + rbuf[38] = ATA_DRDY; /* really, this is Status reg */ + rbuf[40] = 0x1; + rbuf[48] = 0x1; rbuf[56] = ATA_CMD_ID_ATA; |