ide_{in|out|put_data() can be somewhat shortened by merging the paths doing
16-bit I/O...
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
This patch is atop of the latest pata-2.6 series...
drivers/ide/ide-io-std.c | 60 +++++++++++++++++++++--------------------------
1 files changed, 28 insertions(+), 32 deletions(-)
Index: linux-2.6/drivers/ide/ide-io-std.c
===================================================================
--- linux-2.6.orig/drivers/ide/ide-io-std.c
+++ linux-2.6/drivers/ide/ide-io-std.c
@@ -225,11 +225,10 @@ void ide_input_data(ide_drive_t *drive,
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);
@@ -238,27 +237,26 @@ void ide_input_data(ide_drive_t *drive,
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);
@@ -271,11 +269,10 @@ void ide_output_data(ide_drive_t *drive,
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);
@@ -284,27 +281,26 @@ void ide_output_data(ide_drive_t *drive,
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);
--
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