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usb: fixes for v3.6-rc1 

Here are three fixes for v3.6-rc1. All on the MUSB driver and
 quite obvious. First there's a Kconfig change which was missed
 earlier, then there is a fix for the usage of the resource name
 and lastly a fix for pm_runtime usage and device initialization.
 
 The last fix is rather critical as it can end up in situations
 where we try to access device's register with clocks disabled,
 which will cause a Data Abort exception (on ARM).
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Merge tag 'fixes-for-v3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

usb: fixes for v3.6-rc1

Here are three fixes for v3.6-rc1. All on the MUSB driver and
quite obvious. First there's a Kconfig change which was missed
earlier, then there is a fix for the usage of the resource name
and lastly a fix for pm_runtime usage and device initialization.

The last fix is rather critical as it can end up in situations
where we try to access device's register with clocks disabled,
which will cause a Data Abort exception (on ARM).
This commit is contained in:
Greg Kroah-Hartman 2012-08-07 17:07:35 -07:00
parent 0d7614f09c 0e38c4ed83
commit 010ccce0fa
2 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/musb/Kconfig
View File

@ -8,7 +8,7 @@ config USB_MUSB_HDRC
tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
depends on USB && USB_GADGET
select NOP_USB_XCEIV if (ARCH_DAVINCI || MACH_OMAP3EVM || BLACKFIN)
select NOP_USB_XCEIV if (SOC_OMAPTI81XX || SOC_OMAPAM33XX)
select NOP_USB_XCEIV if (SOC_TI81XX || SOC_AM33XX)
select TWL4030_USB if MACH_OMAP_3430SDP
select TWL6030_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
select USB_OTG_UTILS
@ -57,7 +57,7 @@ config USB_MUSB_AM35X
config USB_MUSB_DSPS
tristate "TI DSPS platforms"
depends on SOC_OMAPTI81XX || SOC_OMAPAM33XX
depends on SOC_TI81XX || SOC_AM33XX
config USB_MUSB_BLACKFIN
tristate "Blackfin"

19
drivers/usb/musb/musb_dsps.c
View File

@ -479,9 +479,9 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
ret = -ENODEV;
goto err0;
}
strcpy((u8 *)res->name, "mc");
res->parent = NULL;
resources[1] = *res;
resources[1].name = "mc";
/* allocate the child platform device */
musb = platform_device_alloc("musb-hdrc", -1);
@ -566,27 +566,28 @@ static int __devinit dsps_probe(struct platform_device *pdev)
}
platform_set_drvdata(pdev, glue);
/* create the child platform device for first instances of musb */
ret = dsps_create_musb_pdev(glue, 0);
if (ret != 0) {
dev_err(&pdev->dev, "failed to create child pdev\n");
goto err2;
}
/* enable the usbss clocks */
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0) {
dev_err(&pdev->dev, "pm_runtime_get_sync FAILED");
goto err2;
}
/* create the child platform device for first instances of musb */
ret = dsps_create_musb_pdev(glue, 0);
if (ret != 0) {
dev_err(&pdev->dev, "failed to create child pdev\n");
goto err3;
}
return 0;
err3:
pm_runtime_disable(&pdev->dev);
pm_runtime_put(&pdev->dev);
err2:
pm_runtime_disable(&pdev->dev);
kfree(glue->wrp);
err1:
kfree(glue);