diff options
Diffstat (limited to 'drivers/ide/ide-io-std.c')
| -rw-r--r-- | drivers/ide/ide-io-std.c | 60 |
1 files changed, 28 insertions, 32 deletions
diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c index 31f5c5f4c093..96a537da8925 100644 --- a/drivers/ide/ide-io-std.c +++ b/drivers/ide/ide-io-std.c @@ -216,11 +216,10 @@ void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; unsigned long data_addr = io_ports->data_addr; + unsigned int words = (len + 1) >> 1; u8 io_32bit = drive->io_32bit; u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - len++; - if (io_32bit) { unsigned long uninitialized_var(flags); @@ -229,27 +228,26 @@ void ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, ata_vlb_sync(io_ports->nsect_addr); } + words >>= 1; if (mmio) - __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); + __ide_mm_insl((void __iomem *)data_addr, buf, words); else - insl(data_addr, buf, len / 4); + insl(data_addr, buf, words); if ((io_32bit & 2) && !mmio) local_irq_restore(flags); - if ((len & 3) >= 2) { - if (mmio) - __ide_mm_insw((void __iomem *)data_addr, - (u8 *)buf + (len & ~3), 1); - else - insw(data_addr, (u8 *)buf + (len & ~3), 1); - } - } else { - if (mmio) - __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); - else - insw(data_addr, buf, len / 2); + if (((len + 1) & 3) < 2) + return; + + buf += len & ~3; + words = 1; } + + if (mmio) + __ide_mm_insw((void __iomem *)data_addr, buf, words); + else + insw(data_addr, buf, words); } EXPORT_SYMBOL_GPL(ide_input_data); @@ -262,11 +260,10 @@ void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, ide_hwif_t *hwif = drive->hwif; struct ide_io_ports *io_ports = &hwif->io_ports; unsigned long data_addr = io_ports->data_addr; + unsigned int words = (len + 1) >> 1; u8 io_32bit = drive->io_32bit; u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; - len++; - if (io_32bit) { unsigned long uninitialized_var(flags); @@ -275,27 +272,26 @@ void ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd, void *buf, ata_vlb_sync(io_ports->nsect_addr); } + words >>= 1; if (mmio) - __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); + __ide_mm_outsl((void __iomem *)data_addr, buf, words); else - outsl(data_addr, buf, len / 4); + outsl(data_addr, buf, words); if ((io_32bit & 2) && !mmio) local_irq_restore(flags); - if ((len & 3) >= 2) { - if (mmio) - __ide_mm_outsw((void __iomem *)data_addr, - (u8 *)buf + (len & ~3), 1); - else - outsw(data_addr, (u8 *)buf + (len & ~3), 1); - } - } else { - if (mmio) - __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); - else - outsw(data_addr, buf, len / 2); + if (((len + 1) & 3) < 2) + return; + + buf += len & ~3; + words = 1; } + + if (mmio) + __ide_mm_outsw((void __iomem *)data_addr, buf, words); + else + outsw(data_addr, buf, words); } EXPORT_SYMBOL_GPL(ide_output_data); |