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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-07-01 05:34:49 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-07-01 05:34:49 +0200 |
| commit | b223f4e215b32849b841e750e83a915b670070f5 (patch) | |
| tree | 75340f6305028de331a17255018869822b3886d2 /drivers/usb/host/ehci-hcd.c | |
| parent | Remove last traces of ->sync_page (diff) | |
| parent | vfs: clean up documentation (diff) | |
| download | linux-b223f4e215b32849b841e750e83a915b670070f5.tar.xz linux-b223f4e215b32849b841e750e83a915b670070f5.zip | |
Merge branch 'd_real' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs into work.misc
Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index ae1b6e69eb96..a962b89b65a6 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -368,6 +368,15 @@ static void ehci_shutdown(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); + /** + * Protect the system from crashing at system shutdown in cases where + * usb host is not added yet from OTG controller driver. + * As ehci_setup() not done yet, so stop accessing registers or + * variables initialized in ehci_setup() + */ + if (!ehci->sbrn) + return; + spin_lock_irq(&ehci->lock); ehci->shutdown = true; ehci->rh_state = EHCI_RH_STOPPING; |