[PATCH 03/10] ide: destroy DMA mappings after ending DMA
From: Bartlomiej Zolnierkiewicz
Date: Fri Feb 20 2009 - 12:11:23 EST
From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: destroy DMA mappings after ending DMA
Move ide_destroy_dmatable() call out from ->dma_end method to
{ide_pc,cdrom_newpc,ide_dma}_intr(), ide_dma_timeout_retry()
and sgiioc4_resetproc().
This causes minor/safe behavior changes w.r.t.:
* cmd64x.c::cmd64{8,x}_dma_end()
* cs5536.c::cs5536_dma_end()
* icside.c::icside_dma_end()
* it821x.c::it821x_dma_end()
* scc_pata.c::__scc_dma_end()
* sl82c105.c::sl82c105_dma_end()
* tx4939ide.c::tx4939ide_dma_end()
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/au1xxx-ide.c | 2 --
drivers/ide/cmd64x.c | 2 --
drivers/ide/icside.c | 3 ---
drivers/ide/ide-atapi.c | 7 +++++--
drivers/ide/ide-cd.c | 1 +
drivers/ide/ide-dma-sff.c | 2 --
drivers/ide/ide-dma.c | 3 +++
drivers/ide/ns87415.c | 2 --
drivers/ide/pmac.c | 2 --
drivers/ide/sc1200.c | 1 -
drivers/ide/scc_pata.c | 2 --
drivers/ide/sgiioc4.c | 2 +-
drivers/ide/trm290.c | 3 +--
drivers/ide/tx4939ide.c | 4 +---
14 files changed, 12 insertions(+), 24 deletions(-)
Index: b/drivers/ide/au1xxx-ide.c
===================================================================
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -280,8 +280,6 @@ static int auide_build_dmatable(ide_driv
static int auide_dma_end(ide_drive_t *drive)
{
- ide_destroy_dmatable(drive);
-
return 0;
}
Index: b/drivers/ide/cmd64x.c
===================================================================
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -327,8 +327,6 @@ static int cmd646_1_dma_end(ide_drive_t
outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
/* clear the INTR & ERROR bits */
outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
- /* and free any DMA resources */
- ide_destroy_dmatable(drive);
/* verify good DMA status */
return (dma_stat & 7) != 4;
}
Index: b/drivers/ide/icside.c
===================================================================
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -291,9 +291,6 @@ static int icside_dma_end(ide_drive_t *d
disable_dma(ec->dma);
- /* Teardown mappings after DMA has completed. */
- ide_destroy_dmatable(drive);
-
return get_dma_residue(ec->dma) != 0;
}
Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -322,8 +322,11 @@ static ide_startstop_t ide_pc_intr(ide_d
stat = tp_ops->read_status(hwif);
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
- if (hwif->dma_ops->dma_end(drive) ||
- (drive->media == ide_tape && (stat & ATA_ERR))) {
+ int rc = hwif->dma_ops->dma_end(drive);
+
+ ide_destroy_dmatable(drive);
+
+ if (rc || (drive->media == ide_tape && (stat & ATA_ERR))) {
if (drive->media == ide_floppy)
printk(KERN_ERR "%s: DMA %s error\n",
drive->name, rq_data_dir(pc->rq)
Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -639,6 +639,7 @@ static ide_startstop_t cdrom_newpc_intr(
if (dma) {
drive->dma = 0;
dma_error = hwif->dma_ops->dma_end(drive);
+ ide_destroy_dmatable(drive);
if (dma_error) {
printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
write ? "write" : "read");
Index: b/drivers/ide/ide-dma-sff.c
===================================================================
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -310,8 +310,6 @@ int ide_dma_end(ide_drive_t *drive)
/* clear INTR & ERROR bits */
ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
- /* purge DMA mappings */
- ide_destroy_dmatable(drive);
wmb();
/* verify good DMA status */
Index: b/drivers/ide/ide-dma.c
===================================================================
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -92,6 +92,7 @@ ide_startstop_t ide_dma_intr(ide_drive_t
u8 stat = 0, dma_stat = 0;
dma_stat = hwif->dma_ops->dma_end(drive);
+ ide_destroy_dmatable(drive);
stat = hwif->tp_ops->read_status(hwif);
if (OK_STAT(stat, DRIVE_READY, drive->bad_wstat | ATA_DRQ)) {
@@ -475,6 +476,7 @@ ide_startstop_t ide_dma_timeout_retry(id
if (error < 0) {
printk(KERN_WARNING "%s: DMA timeout error\n", drive->name);
(void)dma_ops->dma_end(drive);
+ ide_destroy_dmatable(drive);
ret = ide_error(drive, "dma timeout error",
hwif->tp_ops->read_status(hwif));
} else {
@@ -486,6 +488,7 @@ ide_startstop_t ide_dma_timeout_retry(id
ide_dump_status(drive, "DMA timeout",
hwif->tp_ops->read_status(hwif));
(void)dma_ops->dma_end(drive);
+ ide_destroy_dmatable(drive);
}
}
Index: b/drivers/ide/ns87415.c
===================================================================
--- a/drivers/ide/ns87415.c
+++ b/drivers/ide/ns87415.c
@@ -210,8 +210,6 @@ static int ns87415_dma_end(ide_drive_t *
/* from ERRATA: clear the INTR & ERROR bits */
dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
outb(dma_cmd | 6, hwif->dma_base + ATA_DMA_CMD);
- /* and free any DMA resources */
- ide_destroy_dmatable(drive);
/* verify good DMA status */
return (dma_stat & 7) != 4;
}
Index: b/drivers/ide/pmac.c
===================================================================
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -1562,8 +1562,6 @@ pmac_ide_dma_end (ide_drive_t *drive)
dstat = readl(&dma->status);
writel(((RUN|WAKE|DEAD) << 16), &dma->control);
- ide_destroy_dmatable(drive);
-
/* verify good dma status. we don't check for ACTIVE beeing 0. We should...
* in theory, but with ATAPI decices doing buffer underruns, that would
* cause us to disable DMA, which isn't what we want
Index: b/drivers/ide/sc1200.c
===================================================================
--- a/drivers/ide/sc1200.c
+++ b/drivers/ide/sc1200.c
@@ -184,7 +184,6 @@ static int sc1200_dma_end(ide_drive_t *d
outb(inb(dma_base)&~1, dma_base); /* !! DO THIS HERE !! stop DMA */
drive->waiting_for_dma = 0;
- ide_destroy_dmatable(drive); /* purge DMA mappings */
return (dma_stat & 7) != 4; /* verify good DMA status */
}
Index: b/drivers/ide/scc_pata.c
===================================================================
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -365,8 +365,6 @@ static int __scc_dma_end(ide_drive_t *dr
dma_stat = scc_dma_sff_read_status(hwif);
/* clear the INTR & ERROR bits */
scc_ide_outb(dma_stat | 6, hwif->dma_base + 4);
- /* purge DMA mappings */
- ide_destroy_dmatable(drive);
/* verify good DMA status */
wmb();
return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
Index: b/drivers/ide/sgiioc4.c
===================================================================
--- a/drivers/ide/sgiioc4.c
+++ b/drivers/ide/sgiioc4.c
@@ -259,7 +259,6 @@ static int sgiioc4_dma_end(ide_drive_t *
}
drive->waiting_for_dma = 0;
- ide_destroy_dmatable(drive);
return dma_stat;
}
@@ -284,6 +283,7 @@ static void
sgiioc4_resetproc(ide_drive_t * drive)
{
sgiioc4_dma_end(drive);
+ ide_destroy_dmatable(drive);
sgiioc4_clearirq(drive);
}
Index: b/drivers/ide/trm290.c
===================================================================
--- a/drivers/ide/trm290.c
+++ b/drivers/ide/trm290.c
@@ -216,8 +216,7 @@ static int trm290_dma_end(ide_drive_t *d
u16 status;
drive->waiting_for_dma = 0;
- /* purge DMA mappings */
- ide_destroy_dmatable(drive);
+
status = inw(drive->hwif->dma_base + 2);
return status != 0x00ff;
Index: b/drivers/ide/tx4939ide.c
===================================================================
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -335,11 +335,9 @@ static int tx4939ide_dma_end(ide_drive_t
/* read and clear the INTR & ERROR bits */
dma_stat = tx4939ide_clear_dma_status(base);
- /* purge DMA mappings */
- ide_destroy_dmatable(drive);
- /* verify good DMA status */
wmb();
+ /* verify good DMA status */
if ((dma_stat & (ATA_DMA_INTR | ATA_DMA_ERR | ATA_DMA_ACTIVE)) == 0 &&
(ctl & (TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST)) ==
(TX4939IDE_INT_XFEREND | TX4939IDE_INT_HOST))
--
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