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ARM: omap: move dma channel allocation into plat-omap code 

This really needs to be there, because otherwise the plat-omap code can
kfree() this data structure, and then re-use the pointer later.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2013-11-08 18:10:42 +00:00
parent 0ef64986d6
commit 9834f81314
4 changed files with 10 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
arch/arm/mach-omap1/dma.c
View File

@ -325,17 +325,6 @@ static int __init omap1_system_dma_init(void)
d->dev_caps |= CLEAR_CSR_ON_READ;
d->dev_caps |= IS_WORD_16;
d->chan = kzalloc(sizeof(struct omap_dma_lch) *
(d->lch_count), GFP_KERNEL);
if (!d->chan) {
dev_err(&pdev->dev,
"%s: Memory allocation failed for d->chan!\n",
__func__);
ret = -ENOMEM;
goto exit_release_d;
}
if (cpu_is_omap15xx())
d->chan_count = 9;
else if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
@ -359,14 +348,14 @@ static int __init omap1_system_dma_init(void)
if (ret) {
dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
__func__, pdev->name, pdev->id);
goto exit_release_chan;
goto exit_release_d;
}
ret = platform_device_add(pdev);
if (ret) {
dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
__func__, pdev->name, pdev->id);
goto exit_release_chan;
goto exit_release_d;
}
dma_pdev = platform_device_register_full(&omap_dma_dev_info);
@ -379,8 +368,6 @@ static int __init omap1_system_dma_init(void)
exit_release_pdev:
platform_device_del(pdev);
exit_release_chan:
kfree(d->chan);
exit_release_d:
kfree(d);
exit_release_p:

7
arch/arm/mach-omap2/dma.c
View File

@ -251,13 +251,6 @@ static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
}
d = oh->dev_attr;
d->chan = kzalloc(sizeof(struct omap_dma_lch) *
(d->lch_count), GFP_KERNEL);
if (!d->chan) {
dev_err(&pdev->dev, "%s: kzalloc fail\n", __func__);
return -ENOMEM;
}
if (cpu_is_omap34xx() && (omap_type() != OMAP2_DEVICE_TYPE_GP))
d->dev_caps |= HS_CHANNELS_RESERVED;

11
arch/arm/plat-omap/dma.c
View File

@ -2030,9 +2030,16 @@ static int omap_system_dma_probe(struct platform_device *pdev)
dma_lch_count = d->lch_count;
dma_chan_count = dma_lch_count;
dma_chan = d->chan;
enable_1510_mode = d->dev_caps & ENABLE_1510_MODE;
dma_chan = devm_kcalloc(&pdev->dev, dma_lch_count,
sizeof(struct omap_dma_lch), GFP_KERNEL);
if (!dma_chan) {
dev_err(&pdev->dev, "%s: kzalloc fail\n", __func__);
return -ENOMEM;
}
if (dma_omap2plus()) {
dma_linked_lch = kzalloc(sizeof(struct dma_link_info) *
dma_lch_count, GFP_KERNEL);
@ -2117,7 +2124,6 @@ exit_dma_irq_fail:
}
exit_dma_lch_fail:
kfree(dma_chan);
return ret;
}
@ -2137,7 +2143,6 @@ static int omap_system_dma_remove(struct platform_device *pdev)
free_irq(dma_irq, (void *)(irq_rel + 1));
}
}
kfree(dma_chan);
return 0;
}

1
include/linux/omap-dma.h
View File

@ -268,7 +268,6 @@ struct omap_dma_dev_attr {
u32 dev_caps;
u16 lch_count;
u16 chan_count;
struct omap_dma_lch *chan;
};
enum {